CN117578387A - Control circuit of multiple input power supply and switching power supply equipment - Google Patents
Control circuit of multiple input power supply and switching power supply equipment Download PDFInfo
- Publication number
- CN117578387A CN117578387A CN202311416784.1A CN202311416784A CN117578387A CN 117578387 A CN117578387 A CN 117578387A CN 202311416784 A CN202311416784 A CN 202311416784A CN 117578387 A CN117578387 A CN 117578387A
- Authority
- CN
- China
- Prior art keywords
- power supply
- signal
- control circuit
- input
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 claims abstract description 126
- 239000003990 capacitor Substances 0.000 claims description 46
- 230000003068 static effect Effects 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/08—Three-wire systems; Systems having more than three wires
- H02J1/084—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The present invention relates to the field of electronic technologies, and in particular, to a control circuit for a multiple input power supply and a switching power supply device. According to the control circuit of the multi-input power supply, the first monitoring circuit is used for monitoring the first power supply signal and inputting the first monitoring signal to the first AND gate, if the first monitoring circuit monitors the first power supply signal, the first monitoring signal output by the first monitoring circuit is a low-level signal, the second control signal output by the first AND gate is a turn-off signal, and the second power supply control circuit cannot supply power to a load; if the first monitoring circuit does not monitor the first power supply signal, the first monitoring signal is a high-level signal, and if the second power supply signal is a high-level signal, namely the second control signal output by the first AND gate is a conducting signal, the second power supply control circuit supplies power to the load by using the second power supply. The invention optimizes the circuit, ensures the power supply sequence, improves the power supply conversion efficiency, reduces the static power consumption and ensures the stability and the reliability of the product.
Description
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to a control circuit for a multiple input power supply and a switching power supply device.
Background
At present, in order to meet the power supply requirement of a load, a switch power supply adopts a multi-input power supply mode to supply power, and three power supply modes of AC-DC power supply, external vehicle-mounted direct current power supply and built-in lithium battery power supply are mainly adopted for a communication vehicle system.
In the prior art, the switching of the power supply mode is finished by utilizing the unidirectional conductivity of the diode, and the circuit is simple in design, but cannot accurately predict and control the product, so that the product lacks stability and reliability.
Disclosure of Invention
The embodiment of the invention provides a control circuit of a multi-input power supply and switching power supply equipment, which are used for solving the problems that products cannot be accurately predicted and controlled in a traditional power supply switching mode, and the products lack stability and reliability.
In a first aspect, the present invention provides a control circuit for a multiple input power supply, comprising;
a first power supply control circuit (1) and a second power supply control circuit (2);
the input end of the first power supply control circuit (1) is connected with a first power supply, and the first power supply control circuit (1) is used for supplying power to the load (3) by using the first power supply;
The second power supply control circuit (2) comprises a first monitoring circuit (21), a first AND gate (22) and a second power supply control circuit (23);
the input end of the first monitoring circuit (21) is connected with the first power supply, and the output end of the first monitoring circuit (21) is used for outputting a first monitoring signal;
the first input end of the first AND gate (22) is connected with the output end of the first monitoring circuit (21), the second input end of the first AND gate (22) is used for inputting a second power supply signal, the output end of the first AND gate (22) is connected with the control end of the second power supply control circuit (23), and the first AND gate (22) is used for outputting a second control signal according to the first monitoring signal and the second power supply signal;
the input end of the second power supply control circuit (23) is connected with a second power supply, and the second power supply control circuit (23) is used for controlling a second power supply signal input into the load (3) according to the second control signal.
In an embodiment, the control circuit of the multiple input power supply further comprises a third power supply control circuit (4), and the third power supply control circuit (4) comprises a second monitoring circuit (41), a second and gate (42) and a third power supply control circuit (43);
The first input end of the second monitoring circuit (41) is connected with a first power supply, the second input end of the second monitoring circuit (41) is connected with a second power supply, and the output end of the second monitoring circuit (41) is used for outputting a second monitoring signal;
the first input end of the second AND gate (42) is connected with the output end of the second monitoring circuit (41), the second input end of the second AND gate (42) is used for inputting a third power supply signal, the output end of the second AND gate (42) is connected with the control end of the third power supply control circuit (43), and the second AND gate (42) is used for outputting a third control signal according to the second monitoring signal and the third power supply signal;
the input end of the third power supply control circuit (43) is connected with a third power supply, the output end of the third power supply control circuit (43) is used for being connected with a load (3), and the third power supply control circuit (43) is used for controlling a third power supply signal input into the load (3) according to the third control signal.
In one embodiment, the first power supply control circuit (1) includes: a first power supply input circuit (11) and a first power supply control circuit (12);
the input end of the first power supply input circuit (11) is used for inputting a first power supply signal, the output end of the first power supply input circuit (11) is connected with the control end of the first power supply control circuit (12), and the first power supply input circuit (11) is used for outputting a first control signal according to the first power supply signal;
The input end of the first power supply control circuit (12) is connected with a first power supply, the output end of the first power supply control circuit (12) is used for being connected with a load (3), and the first power supply control circuit (12) is used for controlling a first power supply signal input into the load (3) according to the first control signal.
In one embodiment, the control circuit of the multi-input power supply further comprises a key control circuit (5), a key monitoring circuit (6) and a processor (7);
the input end of the key control circuit (5) is respectively connected with a first power supply, a second power supply and a third power supply, the third input end of the key control circuit (5) is connected with the third power supply, keys are arranged in the key control circuit (5) in series, and the keys are used for controlling the output end of the key control circuit (5) to output key control signals;
the input end of the key monitoring circuit (6) is connected with the output end of the key control circuit (5), and the key monitoring circuit (6) is used for outputting a key monitoring signal according to the key control signal;
the input end of the processor (7) is connected with the output end of the key monitoring circuit (6), and the processor (7) is used for controlling a first power supply enabling signal, a second power supply enabling signal and a third power supply enabling signal which are output by the output end according to the key monitoring signal.
In one embodiment, the first power input circuit (11) includes: the first or gate, first resistance, second resistance, the one end of first resistance is used for inputting the button control signal, the other end of first resistance is connected the first input of first or gate, the one end of second resistance is used for inputting first power enable signal, the other end of second resistance is connected the second input of first or gate, the output of first or gate is connected the control end of first power control circuit (12), the fourth power is connected to the power end of first or gate, the ground connection of first or gate, first or gate is used for according to button control signal first power enable signal output first control signal.
In one embodiment, the first power supply control circuit (12) includes: the first switch tube, the second switch tube, the first capacitor, the second capacitor, the third resistor, the fourth resistor, the fifth resistor and the sixth resistor;
one end of the third resistor is connected with the output end of the first power input circuit (11), the other end of the third resistor is connected with one end of the fourth resistor, the other end of the fourth resistor is grounded, the first capacitor is connected with the fourth resistor in parallel, one end of the fourth resistor is connected with the control end of the second switch tube, the input end of the second switch tube is grounded, the output end of the second switch tube is connected with one end of the fifth resistor, the other end of the fifth resistor is connected with the control end of the first switch tube, the input end of the first switch tube is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with the control end of the first switch tube, the input end of the first switch tube is connected with the first power supply, the output end of the first switch tube is used for being connected with a load (3), one end of the second capacitor is connected with the first power supply, and the other end of the second capacitor is grounded.
In one embodiment, the first power supply control circuit (12) further includes: the high-voltage power supply comprises a first diode, a first fuse, a third capacitor and a fourth capacitor, wherein one end of the first fuse is connected with a first power supply, the other end of the first fuse is connected with the input end of a first switch tube, the output end of the first switch tube is connected with the input end of the first diode, the output end of the first diode is used for being connected with a load (3), one end of the third capacitor is connected with the output end of the first switch tube, the other end of the third capacitor is grounded, one end of the fourth capacitor is connected with the output end of the first diode, and the other end of the fourth capacitor is grounded.
In one embodiment, the first monitoring circuit (21) comprises: the switching device comprises a third switching tube, a seventh resistor, an eighth resistor, a ninth resistor and a fifth capacitor, wherein one end of the seventh resistor is connected with a first power supply, the other end of the seventh resistor is connected with one end of the eighth resistor, the other end of the eighth resistor is grounded, the fifth capacitor is connected with the eighth resistor in parallel, one end of the eighth resistor is connected with a control end of the third switching tube, the output end of the third switching tube is grounded, the input end of the third switching tube is connected with one end of the ninth resistor, the other end of the ninth resistor is connected with a fourth power supply, and one end of the ninth resistor is connected with a first input end of a first AND gate (22).
In one embodiment, the second monitoring circuit (41) includes: the power supply comprises a second or gate, a sixth switch tube, a tenth capacitor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor and an eighteenth resistor, wherein one end of the fourteenth resistor is connected with a first power supply, the other end of the fourteenth resistor is connected with a first input end of the second or gate, one end of the fifteenth resistor is connected with a second input end of the second or gate, the output end of the second or gate is connected with one end of the sixteenth resistor, the power supply end of the second or gate is connected with a fourth power supply, the ground of the second or gate is grounded, the other end of the sixteenth resistor is connected with one end of the seventeenth resistor, the other end of the seventeenth resistor is grounded, the tenth capacitor is connected with the seventeenth resistor in parallel, the other end of the seventeenth resistor is connected with a control end of the sixth switch tube, the output end of the sixth switch tube is grounded, the input end of the sixth switch tube is connected with one end of the eighteenth resistor, the other eighteenth resistor is grounded, and the other eighteenth resistor is connected with the first power supply (42).
In a second aspect, the present invention provides a switching power supply apparatus comprising a control circuit of a multiple input power supply as described in the first aspect and modifications thereto.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
the control circuit of the multi-input power supply is characterized in that a first monitoring circuit, a first AND gate and a second power supply control circuit are arranged in a second power supply control circuit, a first monitoring circuit is used for monitoring a first power supply signal and inputting a first monitoring signal to the first AND gate, if the first monitoring circuit monitors the first power supply signal, the first monitoring signal output by the first monitoring circuit is a low-level signal, a second control signal output by the first AND gate is a turn-off signal, and the second power supply control circuit cannot supply power to a load; if the first monitoring circuit does not monitor the first power supply signal, the first monitoring signal is a high-level signal, and if the second power supply signal is a high-level signal, the second control signal output by the first AND gate is a conducting signal, and the second power supply control circuit supplies power to the load by using the second power supply. The invention optimizes the circuit, ensures the power supply sequence, improves the power supply conversion efficiency, reduces the static power consumption and ensures the stability and the reliability of the product.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a control circuit for a multi-input power supply according to an embodiment of the present invention;
FIG. 2 is a schematic block diagram of a control circuit for a multi-input power supply according to an embodiment of the present invention;
FIG. 3 is a schematic block diagram of a first power supply control circuit according to an embodiment of the present invention;
FIG. 4 is a schematic block diagram of a control circuit of a multi-input power supply according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of circuit connection of a first power input circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of circuit connection of a first power control circuit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of circuit connection of a second power control circuit according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of circuit connection of a third power control circuit according to an embodiment of the present invention;
FIG. 9 is a schematic circuit diagram of a first monitoring circuit according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of circuit connection of a second monitoring circuit according to an embodiment of the present invention;
wherein 1, a first power supply control circuit, 2, a second power supply control circuit, 3, a load, 4, a third power supply control circuit, 5, a key control circuit, 6, a key monitoring circuit, 7, a processor, 11, a first power input circuit, 12, a first power control circuit, 21, a first monitoring circuit, 22, a first and gate, 23, a second power control circuit, 41, a second monitoring circuit, 42, a second and gate, 43, and a third power control circuit.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the following description, for the purpose of providing a thorough understanding of the present invention, detailed structures and steps are presented in order to illustrate the technical solution presented by the present invention. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.
Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In one embodiment, as shown in fig. 1, a schematic block diagram of a control circuit of a multi-input power supply is provided, including: a first power supply control circuit 1 and a second power supply control circuit 2;
the input end of the first power supply control circuit 1 is connected with a first power supply, and the first power supply control circuit 1 is used for supplying power to the load 3 by using the first power supply;
the second power supply control circuit 2 comprises a first monitoring circuit 21, a first AND gate 22 and a second power supply control circuit 23;
the input end of the first monitoring circuit 21 is connected with a first power supply, and the output end of the first monitoring circuit 21 is used for outputting a first monitoring signal;
the first input end of the first and gate 22 is connected to the output end of the first monitoring circuit 21, the second input end of the first and gate 22 is used for inputting a second power supply signal, the output end of the first and gate 22 is connected to the control end of the second power supply control circuit 23, and the first and gate 22 is used for outputting a second control signal according to the first monitoring signal and the second power supply signal;
the input end of the second power supply control circuit 23 is connected to a second power supply, and the second power supply control circuit 23 is used for controlling a second power supply signal input to the load 3 according to the second control signal.
The second input end of the first and gate 22 may be directly connected to a second power supply, where the second power supply signal is a second power supply signal; the second input end of the first and gate 22 may be connected to a switch or a button, the other end of the switch or the button is connected to a second power supply, the power supply of the load 3 is controlled by the button or the switch, when the switch is turned off, or the button is not pressed, the second power supply signal is a low level signal, at this time, no matter whether the first monitoring circuit 21 monitors the first power supply signal, the output end of the first and gate 22 outputs the low level signal, and the second power supply control circuit 23 is in an off state and does not supply power to the load 3; when the button is pressed or the switch is closed, the second power supply signal is a high level signal, and if the first monitoring circuit 21 does not monitor the first power supply signal at this time, the output end of the first and gate 22 outputs the high level signal.
The working process of the control circuit of the multi-input power supply is as follows: if the second power supply signal is a high level signal, the first power supply supplies power to the load 3 through the first power supply control circuit 1, the first monitoring circuit 21 in the second power supply control circuit 2 monitors the first power supply signal, when the first monitoring circuit 21 monitors the first power supply signal, a low level signal is output, the low level signal flows to the first and gate 22, at this time, one of two input ends of the first and gate 22 is a low level signal, and the other is a high level signal, at this time, the output end of the and gate outputs the low level signal, and the second power supply control circuit 23 is in an off state and cannot supply power to the load 3 according to the characteristics of the and gate components;
If the first monitoring circuit 21 does not monitor the first power signal, a high level signal is output, the high level signal flows to the first and gate 22, at this time, both input ends of the first and gate 22 are high level signals, and according to the characteristics of the and gate components, the output end of the and gate outputs the high level signal, the high level signal turns on the second power control circuit 23, the second power control circuit 23 supplies power to the load 3 by using the second power, and when the first monitoring circuit 21 does not monitor the first power signal, the second power signal is adopted to supply power to the load 3.
It can be understood that the first monitoring circuit 21 may identify the first power supply signal and output the first monitoring signal by using a relay, may identify the first power supply signal and output the first monitoring signal by using a switching tube, may identify the first power supply signal and output the first monitoring signal by using an optocoupler, may identify the first power supply signal by using a diode, and output the first monitoring signal by using a not gate;
the second power control circuit 23 may control the second power signal of the input load 3 by using the on and off of the switching tube, may control the second power signal of the input load 3 by using the on and off of the optocoupler, and may control the second power signal of the input load 3 by using the on and off of the relay.
As other embodiments, the first and gate 22 may be a combination of a nand gate and a nor gate, or an exclusive or gate and a nor gate.
In the control circuit of the multiple input power supply of the present embodiment, the first monitoring circuit 21 is used to monitor the first power supply signal, and input the first monitoring signal to the first and gate 22, if the first monitoring circuit 21 monitors the first power supply signal, the output first monitoring signal is a low level signal, the second control signal output by the first and gate 22 is a turn-off signal, and the second power supply control circuit 23 will not supply power to the load 3; if the first monitoring circuit 21 does not monitor the first power supply signal, the output first monitoring signal is a high level signal, and if the second power supply signal is a high level signal at this time, the second control signal output from the first and gate 22 is a conducting signal, and the second power supply control circuit 23 supplies power to the load 3 by using the second power supply. The invention optimizes the circuit, ensures the power supply sequence, improves the power supply conversion efficiency, reduces the static power consumption and ensures the stability and the reliability of the product.
In an embodiment, as shown in fig. 2, a schematic block diagram of a control circuit of a multiple input power supply is provided, and on the basis of the control circuit of the multiple input power supply shown in fig. 1, the control circuit of the multiple input power supply further includes a third power supply control circuit 4, where the third power supply control circuit 4 includes a second monitor circuit 41, a second and gate 42, and a third power supply control circuit 43;
The first input end of the second monitoring circuit 41 is connected with a first power supply, the second input end of the second monitoring circuit 41 is connected with a second power supply, and the output end of the second monitoring circuit 41 is used for outputting a second monitoring signal;
the first input end of the second and gate 42 is connected to the output end of the second monitoring circuit 41, the second input end of the second and gate 42 is used for inputting a third power supply signal, the output end of the second and gate 42 is connected to the control end of the third power supply control circuit 43, and the second and gate 42 is used for outputting a third control signal according to the second monitoring signal and the third power supply signal;
an input end of the third power supply control circuit 43 is connected to a third power supply, an output end of the third power supply control circuit 43 is used for being connected to the load 3, and the third power supply control circuit 43 is used for controlling a third power supply signal input to the load 3 according to the third control signal.
The second input end of the second and gate 42 may be directly connected to a third power supply, where the third power supply signal is a third power supply signal; the second input end of the second and gate 42 may be connected to a switch or a button, the other end of the switch or the button is connected to a third power supply, the power supply of the load 3 is controlled by the button or the switch, when the switch is turned off, or the button is not pressed, the third power supply signal is a low level signal, at this time, no matter whether the second monitoring circuit 41 monitors the first power supply signal and the second power supply signal, the output end of the second and gate 42 outputs the low level signal, and the third power supply control circuit 43 is in an off state and does not supply power to the load 3; when the button is pressed or the switch is closed, the third power supply signal is a high level signal, and if the second monitoring circuit 41 does not monitor the first power supply signal or the second power supply signal at this time, the output terminal of the second and gate 42 outputs the high level signal.
The working process of the control circuit of the multi-input power supply is as follows: if the third power supply signal is a high level signal, the second monitoring circuit 41 monitors the first power supply signal output by the first power supply and the second power supply signal output by the second power supply, when the first power supply signal is monitored or the second power supply signal is monitored, a low level signal is output, the low level signal flows to the second and gate 42, the second input end of the second and gate 42 inputs the third power supply signal, at this time, one of the two input ends of the second and gate 42 is the low level signal, the other is the high level signal, and according to the characteristics of the and gate components, the output end of the and gate outputs the low level signal at this time, and the third power supply control circuit 43 is in an off state and does not supply power to the load 3;
if the second monitoring circuit 41 does not monitor the first power signal and does not monitor the second power signal, a high level signal is output, the high level signal flows to the second and gate 42, at this time, both input ends of the second and gate 42 are high level signals, and according to the characteristics of the and gate components, at this time, the output end of the and gate outputs the high level signal, the high level signal turns on the third power control circuit 43, and the third power control circuit 43 uses the third power to supply power without the load 3.
It is to be understood that the second monitoring circuit 41 may identify the first power signal and the second power signal by using an or gate, output the second monitoring signal through an not gate, identify the first power signal and the second power signal by using two diodes, and output the second monitoring signal through an not gate, or identify the first power signal and the second power signal by using an or gate, output the second monitoring signal through an not gate, where the not gate may also be replaced by a switch tube, an optocoupler, or a relay.
As other embodiments, the second and gate 42 may be a combination of a nand gate and a nor gate, or an exclusive or gate and a nor gate.
The control circuit for multiple input power supplies of this embodiment prioritizes the power supplies, provides the third power supply for supplying power, and monitors the first power supply signal and the second power supply signal through the second monitoring circuit 41. When the first power supply signal and the second power supply signal are not monitored, the third power supply can be used for supplying power to the load 3. The stable power supply is ensured, and the static power consumption is reduced.
In one embodiment, as shown in fig. 3, a schematic block diagram of a first power supply control circuit 1 is provided, and based on the control circuit of the multi-input power supply shown in fig. 2,
The first power supply control circuit 1 includes: a first power supply input circuit 11, a first power supply control circuit 12;
the input end of the first power input circuit 11 is used for inputting a first power supply signal, the output end of the first power input circuit 11 is connected with the control end of the first power control circuit 12, and the first power input circuit 11 is used for outputting a first control signal according to the first power supply signal;
the input end of the first power supply control circuit 12 is connected with a first power supply, the output end of the first power supply control circuit 12 is used for being connected with the load 3, and the first power supply control circuit 12 is used for controlling a first power supply signal input into the load 3 according to the first control signal.
The input end of the first power supply input circuit 11 can be directly connected with a first power supply, the first power supply signal is a first power supply signal, the input end of the first power supply input circuit 11 can also be connected with a switch or a button, the other end of the switch or the button is connected with the first power supply, the power supply of the load 3 is controlled through the button or the switch, when the switch is disconnected or the button is not pressed, the first power supply signal is a low level signal, the first control signal output by the first power supply input circuit 11 is a low level signal, and the first power supply control circuit 12 is in an off state and does not supply power to the load 3; when the button is pressed or the switch is closed, the first power supply signal is a high level signal, and the first control signal output from the first power input circuit 11 is also a high level signal.
The working process of the control circuit of the multi-input power supply is as follows: if the first power supply signal is a high level signal, the first control signal output by the first power input circuit 11 is a high level signal, the first power control circuit 12 is turned on, and the first power supply is used for supplying power to the load 3; if the first power supply signal is a low level signal, the first control signal output from the first power input circuit 11 is a low level signal, and the first power control circuit 12 is in an off state, so that power is not supplied to the load 3.
It can be understood that the first power input circuit 11 may identify the first power supply control signal by using a diode and output the first control signal, or may identify by using a resistor or an inductor, or identify and output by using a switching tube, an optocoupler, or a relay.
The first power control circuit 12 may control the first power signal of the input load 3 by using the on and off of the switching tube, may control the first power signal of the input load 3 by using the on and off of the optocoupler, and may control the first power signal of the input load 3 by using the on and off of the relay.
In the control circuit for multiple input power supply of this embodiment, the first power supply input circuit 11 is provided to identify the first power supply signal and control the first power supply control circuit 12, so that the first power supply can be controlled by a button or a switch to supply power to the load 3, which can isolate the power supply and ensure the safety of the circuit and the load 3.
In an embodiment, as shown in fig. 4, a schematic block diagram of a control circuit of a multiple input power supply is provided, and the control circuit of the multiple input power supply further includes a key control circuit 5, a key monitor circuit 6, and a processor 7 based on the control circuit of the multiple input power supply shown in fig. 3;
the input end of the key control circuit 5 is respectively connected with a first power supply, a second power supply and a third power supply, keys are connected in series in the key control circuit 5, and the keys are used for controlling the output end of the key control circuit 5 to output key control signals;
the input end of the key monitoring circuit 6 is connected with the output end of the key control circuit 5, and the key monitoring circuit 6 is used for outputting a key monitoring signal according to the key control signal;
the input end of the processor 7 is connected with the output end of the key monitoring circuit 6, and the processor 7 is used for controlling the first power supply enabling signal, the second power supply enabling signal and the third power supply enabling signal output by the output end according to the key monitoring signal.
The processor 7 is part of the load 3, i.e. when the load 3 is powered up, the processor 7 starts to operate, in this embodiment, the key control signal may be used as a first power supply signal, the key control signal may be used as a second power supply signal, the key control signal may be used as a third power supply signal, the first power supply enable signal may be used as a first power supply signal, the second power supply enable signal may be used as a second power supply signal, and the third power supply enable signal may be used as a third power supply signal.
Preferably, the key control signal and the first power supply enable signal are used as first power supply signals, any one of the key control signal and the first power supply enable signal is a high-level signal, and the first power supply signals are high-level signals; the key control signal and the second power supply enabling signal are used as second power supply signals, any one of the key control signal and the second power supply enabling signal is a high-level signal, and the second power supply signal is a high-level signal; the key control signal and the third power supply enable signal are used as third power supply signals, any one of the key control signal and the third power supply enable signal is a high-level signal, and the third power supply signal is a high-level signal.
The working process of the control circuit of the multi-input power supply is as follows: when a key is pressed, the key control circuit 5 is conducted, signals output by one or more of the first power supply, the second power supply and the third power supply are used as key control signals and output through the output end of the key control circuit 5, after the key monitoring circuit 6 receives the key control signals, the key monitoring signals are output to the processor 7, at the moment, the key control signals are high-level signals, namely, the first power supply signal, the second power supply signal and the third power supply signal are high-level signals, if the first power supply is adopted to supply power to the load 3 at the moment, the first power supply control circuit 12 is conducted, the first power supply is used to supply power to the load 3, the processor 7 starts to work after the power on of the load 3 is completed, the processor 7 outputs a first power supply enabling signal according to the key monitoring signals, and when the key is released, the first power supply enabling signal is used as the first power supply signal to control the first power supply control circuit 12 to be continuously conducted, and the first power supply is continuously used to supply power to the load 3.
When the load 3 needs to be shut down, the key is pressed, the key monitoring circuit 6 detects the key change state and outputs a key monitoring signal to the processor 7, and after the processor 7 receives the key monitoring signal, the output of the first power supply enabling signal is stopped, and the first power supply control circuit 12 is shut down and does not supply power to the load 3.
In order to ensure that any one of the key control signal and the first power supply enabling signal is a high-level signal, the first power supply signal is a high-level signal; the input end of the first power input circuit 11 can be connected with two diodes, and the input ends of the diodes are respectively used for inputting a key control signal and a first power enable signal; the input end of the first power input circuit 11 may be connected to an or gate, the first input end of the or gate, the second input end of the or gate is used for inputting a key control signal and a first power enable signal, and similarly, the second input end of the first and gate 22 may be connected to two diodes or an or gate; a second input of the second and gate 42 may be connected to two diodes and may be connected to an or gate.
The control circuit of the multi-input power supply of the embodiment is provided with a key control circuit 5, a key monitoring circuit 6 and a processor 7, a system is started and stopped through keys in the key control circuit 5, the key monitoring circuit 6 monitors the key state and sends a monitored signal to the processor 7, the processor 7 can output or shut down a corresponding signal according to the key state, the circuit can be protected, and the load 3 can be continuously supplied with power after the keys are released through the signal output by the processor 7, so that the stability of the power supply is ensured, and the stability and the reliability of products are further ensured.
In one embodiment, as shown in fig. 5, a schematic circuit connection diagram of a first power input circuit 11 is provided, and the first power input circuit 11 includes: the first or gate U1, the first resistor R1, the second resistor R2, the one end of this first resistor R1 is used for inputting this key control signal, the other end of this first resistor R1 connects the first input terminal of this first or gate U1, the one end of this second resistor R2 is used for inputting this first power enable signal, the second input terminal of this first or gate U1 is connected to the other end of this second resistor R2, the control end of this first power control circuit 12 is connected to the output of this first or gate U1, the fourth power is connected to the power end of this first or gate U1, the ground connection of this first or gate U1, this first or gate U1 is used for according to this key control signal, this first power enable signal output first control signal.
The embodiment adopts the OR gate to take the key control signal and the first power supply enabling signal as the first power supply signal.
The working process of the control circuit of the multi-input power supply is as follows: when the first or gate U1 receives the key control signal or the first power enable signal, a high level signal is output to the first power control circuit 12.
The control circuit of the multi-input power supply of the embodiment adopts the OR gate key control signal and the first power supply enabling signal as the first power supply signal, and has the advantages of simple structure, low power consumption and higher reliability.
In one embodiment, as shown in fig. 6, a schematic circuit connection diagram of the first power supply control circuit 12 is provided, and on the basis of the control circuit of the multi-input power supply shown in fig. 4, the first power supply control circuit 12 includes: the first switching tube Q1, the second switching tube Q2, the first capacitor C1, the second capacitor C2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6;
one end of the third resistor R3 is connected to the output end of the first power input circuit 11, the other end of the third resistor R3 is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is grounded, the first capacitor C1 is connected in parallel with the fourth resistor R4, one end of the fourth resistor R4 is connected to the control end of the second switch tube Q2, the input end of the second switch tube Q2 is grounded, the output end of the second switch tube Q2 is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to the control end of the first switch tube Q1, the input end of the first switch tube Q1 is connected to one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected to the control end of the first switch tube Q1, the input end of the first switch tube is indirectly connected to the first power supply, the output end of the first switch tube Q1 is connected to the load 3, one end of the second capacitor C2 is connected to the other end of the second switch tube C2.
The working process of the control circuit of the multi-input power supply is as follows: the first control signal output by the first power supply is divided by the third resistor R3 and the fourth resistor R4, filtered by the first capacitor C1 and flows to the control end of the second switching tube Q2. If the first control signal is a low level signal, the second switching tube Q2 is turned off, the later-stage circuit is turned off, if the first control signal is a high level signal, the second switching tube Q2 is turned on, after the second switching tube Q2 is turned on, due to the voltage division of the fifth resistor R5 and the sixth resistor R6, the input of the grid electrode of the first switching tube Q1 is a low level signal, the first switching tube Q1 is turned on, and the first power supply signal flows to the load 3 through the first switching tube Q1.
As shown in fig. 7 and 8, the second power control circuit and the third power control circuit may be configured in the same manner as the first power control circuit, and the effect is the same as that of the first power control circuit, which is not described herein.
According to the control circuit of the multi-input power supply, the first power supply is controlled to supply power to the load 3 by adopting the on-off of the switching tube, the safety of the switching tube is high, the stability of the circuit can be ensured, the second capacitor C2 is utilized to filter the first power supply signal, and the stability and the reliability of the circuit are ensured.
In one embodiment, on the basis of the control circuit of the multi-input power supply shown in fig. 6, the first power supply control circuit (12) further includes: the first diode D1, the first fuse F1, the third capacitor C3, the fourth capacitor C4, one end of the first fuse F1 connects the first power, the other end of the first fuse F1 connects the input end of the first switch tube Q1, the output end of the first switch tube Q1 connects the input end of the first diode D1, the output end of the first diode D1 connects the load (3), one end of the third capacitor C3 connects the output end of the first switch tube Q1, the other end of the third capacitor C3 connects the output end of the first diode D1, the other end of the fourth capacitor C4 connects the ground.
The control circuit of the multi-input power supply of the embodiment. The circuit is protected by the first fuse F1, the load is protected by the first diode D1, and the third capacitor C3 and the fourth capacitor C4 are used for filtering signals, so that the stability and the reliability of the circuit are ensured.
In one embodiment, as shown in fig. 8, a schematic circuit connection diagram of a first monitoring circuit 21 is provided, and the first monitoring circuit 21 includes: the third switch tube Q3, the seventh resistance R7, the eighth resistance R8, the ninth resistance R9, the fifth capacitor C5, one end of the seventh resistance R7 connects the first power, another end of the seventh resistance R7 connects one end of the eighth resistance R8, another end of the eighth resistance R8 connects with the ground, the fifth capacitor C5 connects with the eighth resistance R8 in parallel, one end of the eighth resistance R8 connects the control end of the third switch tube Q3, the output end of the third switch tube Q3 connects with the ground, the input end of the third switch tube Q3 connects one end of the ninth resistance R9, another end of the ninth resistance R9 connects the fourth power, one end of the ninth resistance R9 connects the first input end of the first AND gate 22.
The working process of the control circuit of the multi-input power supply is as follows: if the load 3 is powered by the first power supply, the first power supply outputs a first power supply signal, the first power supply signal is divided by the seventh resistor R7 and the eighth resistor R8, the filtered first power supply signal flows to the third switching tube Q3 after being filtered by the fifth capacitor C5, the third switching tube Q3 is turned on, and the signal input to the first input end of the first and gate 22 is a low level signal; if the load 3 is not powered by the first power supply, the fourth power supply VCC flows through the ninth resistor R9 to the first input of the first and gate 22.
In the control circuit of the multi-input power supply of the embodiment, the switch tube is used for monitoring the first power supply signal, so that when the first power supply supplies power to the load 3, the second power supply control circuit 23 is turned off, the power supply stability is ensured, and the static power consumption is reduced. The switching tube has the advantages of high efficiency, high frequency, high reliability, low noise and the like, and can ensure the stability of a circuit.
In an embodiment, as shown in fig. 10, a schematic circuit connection diagram of a second monitoring circuit 41 is provided, and the second monitoring circuit 41 includes: the second or gate U2, the sixth switching tube Q6, the tenth electric capacity C10, the fourteenth electric resistance R14, the fifteenth electric resistance R15, the sixteenth electric resistance R16, the seventeenth electric resistance R17, the eighteenth electric resistance R18, one end of the fourteenth electric resistance R14 connects the first power, the other end of the fourteenth electric resistance R14 connects the first input end of the second or gate U2, one end of the fifteenth electric resistance R15 connects the second input end of the second or gate U2, the output end of the second or gate U2 connects one end of the sixteenth electric resistance R16, the power end of the second or gate U2 connects the fourth power, the ground terminal of the second or gate U2 connects one end of the seventeenth electric resistance R17, the other end of the seventeenth electric resistance R17 connects the ground terminal, the tenth electric capacity C10 connects the first input end of the seventeenth electric resistance R17 in parallel, the other end of the seventeenth electric resistance R17 connects the control end of the sixth switching tube Q6, the output end of the sixteenth switching tube Q6 connects the fourth power input end of the eighteenth electric resistance R18, the eighteenth electric resistance R18 connects the other end of the eighteenth electric resistance R18.
The working process of the control circuit of the multi-input power supply is as follows: if the load 3 is powered by the first power supply or is powered by the second power supply, the first power supply signal or the second power supply signal flows to the sixth switching tube Q6 through the second or gate U2, the sixth switching tube Q6 is turned on, the signal input to the first input end of the second and gate 42 is a low level signal, and if the load 3 is powered by neither the first power supply nor the second power supply, the fourth power supply flows to the first input end of the second and gate 42 through the eighteenth resistor R18.
In the control circuit of the multi-input power supply of the embodiment, the first power supply signal and the second power supply signal are monitored by combining the or gate and the switch tube, so that when the first power supply supplies power to the load 3 or when the second power supply supplies power to the load 3, the third power supply control circuit 43 is turned off, the stability of the power supply is ensured, and the static power consumption is reduced.
In an embodiment, a switching power supply device is provided, which comprises the control circuit of the multi-input power supply mentioned in any of the embodiments above. The switch power supply monitors a first power supply signal by using a first monitoring circuit 21 and inputs the first monitoring signal to a first and gate 22, if the first monitoring circuit 21 monitors the first power supply signal, the output first monitoring signal is a low level signal, the output second control signal of the first and gate 22 is a turn-off signal, and the second power supply control circuit 23 cannot supply power to the load 3; if the first monitoring circuit 21 does not monitor the first power supply signal, the output first monitoring signal is a high level signal, and if the second power supply signal is a high level signal, that is, the second control signal output by the first and gate 22 is a conducting signal, the second power supply control circuit 23 supplies power to the load 3 by using the second power supply. The invention optimizes the circuit, ensures the power supply sequence, improves the power supply conversion efficiency, reduces the static power consumption and ensures the stability and the reliability of the product.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. The control circuit of the multi-input power supply is characterized by comprising a first power supply control circuit (1) and a second power supply control circuit (2);
the input end of the first power supply control circuit (1) is connected with a first power supply, and the first power supply control circuit (1) is used for supplying power to the load (3) by using the first power supply;
the second power supply control circuit (2) comprises a first monitoring circuit (21), a first AND gate (22) and a second power supply control circuit (23);
the input end of the first monitoring circuit (21) is connected with the first power supply, and the output end of the first monitoring circuit (21) is used for outputting a first monitoring signal;
The first input end of the first AND gate (22) is connected with the output end of the first monitoring circuit (21), the second input end of the first AND gate (22) is used for inputting a second power supply signal, the output end of the first AND gate (22) is connected with the control end of the second power supply control circuit (23), and the first AND gate (22) is used for outputting a second control signal according to the first monitoring signal and the second power supply signal;
the input end of the second power supply control circuit (23) is connected with a second power supply, and the second power supply control circuit (23) is used for controlling a second power supply signal input into the load (3) according to the second control signal.
2. The control circuit for a multiple-input power supply according to claim 1, wherein,
the control circuit of the multi-input power supply further comprises a third power supply control circuit (4), wherein the third power supply control circuit (4) comprises a second monitoring circuit (41), a second AND gate (42) and a third power supply control circuit (43);
the first input end of the second monitoring circuit (41) is connected with a first power supply, the second input end of the second monitoring circuit (41) is connected with a second power supply, and the output end of the second monitoring circuit (41) is used for outputting a second monitoring signal;
The first input end of the second AND gate (42) is connected with the output end of the second monitoring circuit (41), the second input end of the second AND gate (42) is used for inputting a third power supply signal, the output end of the second AND gate (42) is connected with the control end of the third power supply control circuit (43), and the second AND gate (42) is used for outputting a third control signal according to the second monitoring signal and the third power supply signal;
the input end of the third power supply control circuit (43) is connected with a third power supply, the output end of the third power supply control circuit (43) is used for being connected with a load (3), and the third power supply control circuit (43) is used for controlling a third power supply signal input into the load (3) according to the third control signal.
3. A control circuit for a multiple-input power supply as claimed in claim 2, characterized in that,
the first power supply control circuit (1) includes: a first power supply input circuit (11) and a first power supply control circuit (12);
the input end of the first power supply input circuit (11) is used for inputting a first power supply signal, the output end of the first power supply input circuit (11) is connected with the control end of the first power supply control circuit (12), and the first power supply input circuit (11) is used for outputting a first control signal according to the first power supply signal;
The input end of the first power supply control circuit (12) is connected with a first power supply, the output end of the first power supply control circuit (12) is used for being connected with a load (3), and the first power supply control circuit (12) is used for controlling a first power supply signal input into the load (3) according to the first control signal.
4. A control circuit for a multiple-input power supply as claimed in claim 3, characterized in that,
the control circuit of the multi-input power supply further comprises a key control circuit (5), a key monitoring circuit (6) and a processor (7);
the input end of the key control circuit (5) is respectively connected with a first power supply, a second power supply and a third power supply, keys are connected in series in the key control circuit (5), and the keys are used for controlling the output end of the key control circuit (5) to output key control signals;
the input end of the key monitoring circuit (6) is connected with the output end of the key control circuit (5), and the key monitoring circuit (6) is used for outputting a key monitoring signal according to the key control signal;
the input end of the processor (7) is connected with the output end of the key monitoring circuit (6), and the processor (7) is used for controlling a first power supply enabling signal, a second power supply enabling signal and a third power supply enabling signal which are output by the output end according to the key monitoring signal.
5. The control circuit for a multiple-input power supply of claim 4, wherein,
the first power input circuit (11) includes: the first or gate, first resistance, second resistance, the one end of first resistance is used for inputting the button control signal, the other end of first resistance is connected the first input of first or gate, the one end of second resistance is used for inputting first power enable signal, the other end of second resistance is connected the second input of first or gate, the output of first or gate is connected the control end of first power control circuit (12), the fourth power is connected to the power end of first or gate, the ground connection of first or gate, first or gate is used for according to button control signal first power enable signal output first control signal.
6. The control circuit for a multiple-input power supply of claim 4, wherein,
the first power supply control circuit (12) includes: the first switch tube, the second switch tube, the first capacitor, the second capacitor, the third resistor, the fourth resistor, the fifth resistor and the sixth resistor;
one end of the third resistor is connected with the output end of the first power input circuit (11), the other end of the third resistor is connected with one end of the fourth resistor, the other end of the fourth resistor is grounded, the first capacitor is connected with the fourth resistor in parallel, one end of the fourth resistor is connected with the control end of the second switch tube, the input end of the second switch tube is grounded, the output end of the second switch tube is connected with one end of the fifth resistor, the other end of the fifth resistor is connected with the control end of the first switch tube, the input end of the first switch tube is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with the control end of the first switch tube, the input end of the first switch tube is connected with the first power supply, the output end of the first switch tube is used for being connected with a load (3), one end of the second capacitor is connected with the first power supply, and the other end of the second capacitor is grounded.
7. The control circuit for a multiple-input power supply of claim 6, wherein,
the first power supply control circuit (12) further includes: the high-voltage power supply comprises a first diode, a first fuse, a third capacitor and a fourth capacitor, wherein one end of the first fuse is connected with a first power supply, the other end of the first fuse is connected with the input end of a first switch tube, the output end of the first switch tube is connected with the input end of the first diode, the output end of the first diode is used for being connected with a load (3), one end of the third capacitor is connected with the output end of the first switch tube, the other end of the third capacitor is grounded, one end of the fourth capacitor is connected with the output end of the first diode, and the other end of the fourth capacitor is grounded.
8. The control circuit for a multiple-input power supply according to claim 1, wherein,
the first monitoring circuit (21) includes: the switching device comprises a third switching tube, a seventh resistor, an eighth resistor, a ninth resistor and a fifth capacitor, wherein one end of the seventh resistor is connected with a first power supply, the other end of the seventh resistor is connected with one end of the eighth resistor, the other end of the eighth resistor is grounded, the fifth capacitor is connected with the eighth resistor in parallel, one end of the eighth resistor is connected with a control end of the third switching tube, the output end of the third switching tube is grounded, the input end of the third switching tube is connected with one end of the ninth resistor, the other end of the ninth resistor is connected with a fourth power supply, and one end of the ninth resistor is connected with a first input end of a first AND gate (22).
9. A control circuit for a multiple-input power supply as claimed in claim 2, characterized in that,
the second monitoring circuit (41) includes: the power supply comprises a second or gate, a sixth switch tube, a tenth capacitor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor and an eighteenth resistor, wherein one end of the fourteenth resistor is connected with a first power supply, the other end of the fourteenth resistor is connected with a first input end of the second or gate, one end of the fifteenth resistor is connected with a second input end of the second or gate, the output end of the second or gate is connected with one end of the sixteenth resistor, the power supply end of the second or gate is connected with a fourth power supply, the ground of the second or gate is grounded, the other end of the sixteenth resistor is connected with one end of the seventeenth resistor, the other end of the seventeenth resistor is grounded, the tenth capacitor is connected with the seventeenth resistor in parallel, the other end of the seventeenth resistor is connected with a control end of the sixth switch tube, the output end of the sixth switch tube is grounded, the input end of the sixth switch tube is connected with one end of the eighteenth resistor, the other eighteenth resistor is grounded, and the other eighteenth resistor is connected with the first power supply (42).
10. A switching power supply device, characterized in that it comprises a control circuit of a multiple input power supply according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311416784.1A CN117578387B (en) | 2023-10-27 | 2023-10-27 | Control circuit of multiple input power supply and switching power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311416784.1A CN117578387B (en) | 2023-10-27 | 2023-10-27 | Control circuit of multiple input power supply and switching power supply equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117578387A true CN117578387A (en) | 2024-02-20 |
| CN117578387B CN117578387B (en) | 2024-08-09 |
Family
ID=89888963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311416784.1A Active CN117578387B (en) | 2023-10-27 | 2023-10-27 | Control circuit of multiple input power supply and switching power supply equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117578387B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5890780A (en) * | 1996-10-07 | 1999-04-06 | Nec Corporation | Power supply switching apparatus with protection function for supplying power to an electronic circuit via an external power source or an internal power supply source |
| CN104682541A (en) * | 2013-11-27 | 2015-06-03 | 深圳市海洋王照明工程有限公司 | Emergency lamp control circuit and emergency lamp control device |
| CN107294199A (en) * | 2017-06-27 | 2017-10-24 | 合肥尚硕新能源有限公司 | A kind of compound voltage detecting switching circuit of logic |
| CN107425506A (en) * | 2017-09-07 | 2017-12-01 | 浙江亿众机器人有限公司 | Multiple power supplies protection circuit |
| CN108988437A (en) * | 2018-08-27 | 2018-12-11 | 珠海格力电器股份有限公司 | Power supply trigger circuit |
| CN110943530A (en) * | 2019-12-16 | 2020-03-31 | 重庆西南集成电路设计有限责任公司 | Power supply switching circuit applied to multi-power supply |
| CN111463894A (en) * | 2020-04-27 | 2020-07-28 | 湖南三一智能控制设备有限公司 | Power supply switching circuit |
| CN115085357A (en) * | 2022-06-27 | 2022-09-20 | 北京京东乾石科技有限公司 | Power supply switching device and unmanned vehicle |
| CN115208166A (en) * | 2022-06-28 | 2022-10-18 | 深圳拓邦股份有限公司 | Multi-power supply control circuit and electrical equipment |
| CN218586940U (en) * | 2022-07-08 | 2023-03-07 | 施耐德电气工业公司 | Circuit for dual power supply system and dual power supply system |
-
2023
- 2023-10-27 CN CN202311416784.1A patent/CN117578387B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5890780A (en) * | 1996-10-07 | 1999-04-06 | Nec Corporation | Power supply switching apparatus with protection function for supplying power to an electronic circuit via an external power source or an internal power supply source |
| CN104682541A (en) * | 2013-11-27 | 2015-06-03 | 深圳市海洋王照明工程有限公司 | Emergency lamp control circuit and emergency lamp control device |
| CN107294199A (en) * | 2017-06-27 | 2017-10-24 | 合肥尚硕新能源有限公司 | A kind of compound voltage detecting switching circuit of logic |
| CN107425506A (en) * | 2017-09-07 | 2017-12-01 | 浙江亿众机器人有限公司 | Multiple power supplies protection circuit |
| CN108988437A (en) * | 2018-08-27 | 2018-12-11 | 珠海格力电器股份有限公司 | Power supply trigger circuit |
| CN110943530A (en) * | 2019-12-16 | 2020-03-31 | 重庆西南集成电路设计有限责任公司 | Power supply switching circuit applied to multi-power supply |
| CN111463894A (en) * | 2020-04-27 | 2020-07-28 | 湖南三一智能控制设备有限公司 | Power supply switching circuit |
| CN115085357A (en) * | 2022-06-27 | 2022-09-20 | 北京京东乾石科技有限公司 | Power supply switching device and unmanned vehicle |
| CN115208166A (en) * | 2022-06-28 | 2022-10-18 | 深圳拓邦股份有限公司 | Multi-power supply control circuit and electrical equipment |
| CN218586940U (en) * | 2022-07-08 | 2023-03-07 | 施耐德电气工业公司 | Circuit for dual power supply system and dual power supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117578387B (en) | 2024-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8456135B2 (en) | High voltage output monitoring device and system for a power battery | |
| WO2019114547A1 (en) | Expandable charging and battery replacing device, and charging and discharging unit thereof | |
| CN103219485B (en) | Battery unit and portable power source | |
| CN103296738B (en) | A kind of dual standby economizing type DC power-supply system | |
| CN117246178A (en) | DC charging pile power distribution one-in four-out switch module device and control method | |
| KR20240058910A (en) | Serial detection system for formation and capacity grading of lithium power batteries | |
| CN201656419U (en) | Power failure warning circuit of network terminal equipment | |
| CN114006433B (en) | Battery device | |
| CN205791785U (en) | Collection catalyst and converter are protected in the by-pass type Anti-electricity dazzling device of one | |
| CN203466839U (en) | Power failure alarm system of access network terminal equipment | |
| CN117578387B (en) | Control circuit of multiple input power supply and switching power supply equipment | |
| CN109428384A (en) | A kind of backup power supply system of AC power supply device, circuit board and standby method for electrically | |
| CN208797864U (en) | The AC-DC brushless motor drive circuit of duplicate protection lithium battery | |
| CN208156170U (en) | A kind of initiative alarming circuit of bus power source | |
| CN205753568U (en) | A kind of elevator five side's intercom system back-up source using ultracapacitor | |
| CN110748243B (en) | Dual drive smart door lock | |
| CN104362468A (en) | Power socket and monitoring device for same | |
| CN114655071A (en) | A kind of battery, battery control method and electric vehicle | |
| JP2013230037A (en) | Battery pack module | |
| CN112910052A (en) | Automatic dormancy protection control device of lithium cell group | |
| CN217642763U (en) | Discharge control circuit, battery management circuit and energy storage equipment | |
| CN218335382U (en) | Switch circuit, BMS system and electronic equipment | |
| CN220691373U (en) | Power supply control circuit and switching power supply | |
| CN221553070U (en) | Power management equipment, battery pack and electric equipment | |
| CN218456340U (en) | Power supply unit of high reliability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |