CN221408676U - Power supply switching circuit, power supply assembly and test equipment - Google Patents
Power supply switching circuit, power supply assembly and test equipment Download PDFInfo
- Publication number
- CN221408676U CN221408676U CN202323541598.9U CN202323541598U CN221408676U CN 221408676 U CN221408676 U CN 221408676U CN 202323541598 U CN202323541598 U CN 202323541598U CN 221408676 U CN221408676 U CN 221408676U
- Authority
- CN
- China
- Prior art keywords
- circuit
- power supply
- switch
- switching
- 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.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The application belongs to the technical field of semiconductor testing, and provides a power supply switching circuit, a power supply component and testing equipment, wherein a first switching circuit is connected between a first power supply and a power supply output port, a second switching circuit is connected between a second power supply and the power supply output port, and a level conversion circuit converts a control signal provided by a control signal port into a switch control signal; the first switch driving circuit controls the on-off state of the first switch circuit according to the switch control signal, the second switch driving circuit controls the on-off state of the first switch circuit according to the switch control signal, and the first switch circuit and the second switch circuit are not conducted simultaneously, so that two mutually exclusive power supplies are controlled through the control pin of the main control chip, and the problem that the current power supply switching scheme cannot realize power supply switching based on logic level is solved.
Description
Technical Field
The application belongs to the field of semiconductor testing, and particularly relates to a power supply switching circuit, a power supply assembly and testing equipment.
Background
The test coverage of functional modules of automatic test equipment (Automatic Test Equipment, ATE) is larger and larger, and the test needs to be satisfied with high voltage and low voltage, so that an ATE test board card can be designed with various types of power supplies from negative pressure to positive pressure and from low voltage to high voltage. Therefore, the efficient switching design of the power supply in the system is an important factor for testing the stability of the system, and the number of channels of the tester is increased, so that the number of requirements for the main control pins (IOs) is increased, and then a small amount of IO resources are necessary for the efficient switching design of the power supply.
However, the current main control chip generally needs to drive a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) through a power driving circuit to realize switching of power supply, and if the MOS transistor is driven by directly adopting the output logic level of the main control chip, the control is unstable.
Disclosure of utility model
The embodiment of the application provides a power supply switching circuit, a power supply component and test equipment, which can directly switch power supplies by outputting control signals from a main control chip.
An embodiment of the present application provides a power switching circuit, connected to a first power supply and a second power supply, for outputting the first power supply or the second power supply to a power output port, where the power switching circuit includes:
A control signal port for receiving a control signal;
The level conversion circuit is connected with the control signal port and used for converting the control signal into a switch control signal;
The first switch circuit is connected between the first power supply and the power supply output port;
The second switch circuit is connected between the second power supply and the power supply output port;
The first switch driving circuit is connected with the first switch circuit and the level conversion circuit and is used for receiving the switch control signal and switching on and off states of the first switch circuit according to the switch control signal;
the second switch driving circuit is connected with the second switch circuit and the level conversion circuit and is used for receiving the switch control signal and switching on and off states of the first switch circuit according to the switch control signal; wherein the first switch circuit and the second switch circuit are not turned on at the same time.
In one embodiment, the power switching circuit further comprises:
The first unidirectional conduction circuit is connected between the power output port and the first switch circuit and is used for preventing current of the power output port from flowing backwards to the first switch circuit.
In one embodiment, the power switching circuit further comprises:
And the second unidirectional conduction circuit is connected between the power output port and the second switch circuit and is used for preventing the current of the power output port from flowing backwards to the second switch circuit.
In one embodiment, the first switching circuit comprises a first resistor, a second resistor and a first switching tube;
The first end of the first resistor, the first end of the first switch tube are connected to the first power supply in a sharing mode, the second end of the first resistor, the first end of the second resistor and the control end of the first switch tube are connected in a sharing mode, the second end of the first switch tube is connected with the power supply output port, and the second end of the second resistor is connected with the first switch driving circuit.
In one embodiment, the first switch driving circuit includes a second switch tube, a first end of the second switch tube is connected to the first switch circuit, a second end of the second switch tube is grounded, and a control end of the second switch tube is connected to the level conversion circuit.
In one embodiment, the level shift circuit includes a third switching tube, a third resistor, a first power supply port, and a second power supply port;
The first end of the third switching tube is connected with the control signal port, the control end of the third switching tube is connected with the first power supply port, the second end of the third switching tube and the first end of the third resistor are commonly connected to serve as the output end of the level conversion circuit, and the second end of the third resistor is connected with the second power supply port; wherein the voltage of the first power supply port is smaller than the voltage of the second power supply port.
In one embodiment, the second switch driving circuit includes a fourth switching tube, a fifth switching tube, a fourth resistor, a fifth resistor, and a third power supply port;
The first end of the fourth resistor is connected with the third power supply port, the second end of the fourth resistor, the first end of the fifth resistor, the first end of the fourth switching tube and the control end of the fifth switching tube are commonly connected, the second end of the fifth resistor is grounded, the second end of the fourth switching tube is grounded, the control end of the fourth switching tube is connected with the level conversion circuit, the first end of the fifth switching tube is connected with the second switching circuit, and the second end of the fifth switching tube is grounded.
In one embodiment, the second switching circuit comprises a sixth resistor, a seventh resistor and a sixth switching tube;
The first end of the sixth resistor is connected with the second switch driving circuit, the second end of the sixth resistor, the first end of the seventh resistor and the control end of the sixth switching tube are connected together, the first end of the sixth switching tube and the second end of the seventh resistor are connected together to the second power supply, and the second end of the sixth switching tube is connected with the power supply output port.
The second aspect of the embodiment of the present application further provides a power supply assembly, which includes the power supply switching circuit according to any one of the embodiments.
A third aspect of the embodiment of the present application further provides a testing device, including a power switching circuit according to any one of the embodiments above.
Compared with the prior art, the embodiment of the application has the beneficial effects that: the first switching circuit is connected between the first power supply and the power supply output port, the second switching circuit is connected between the second power supply and the power supply output port, and the level conversion circuit converts the control signal provided by the control signal port into a switching control signal; the first switch driving circuit controls the on-off state of the first switch circuit according to the switch control signal, the second switch driving circuit controls the on-off state of the first switch circuit according to the switch control signal, and the first switch circuit and the second switch circuit are not conducted simultaneously, so that two mutually exclusive power supplies are controlled through the control pin of the main control chip, and the problem that the current power supply switching scheme cannot realize power supply switching based on logic level is solved.
Drawings
Fig. 1 is a schematic diagram of a power switching circuit according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a power switching circuit according to an embodiment of the present application;
Fig. 3 is a schematic diagram of a power switching circuit according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application 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 application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is one or more than one unless specifically defined otherwise.
In order to solve the problem that the current main control chip (such as an FPGA or an MCU) generally needs to drive the MOS tube through a power driving circuit to realize the switching of the power supply, if the main control chip is directly adopted to output logic level to drive the MOS tube, the control is unstable. The embodiment of the present application provides a power switching circuit, as shown in fig. 1, which is connected to a first power supply 110 and a second power supply 120, and through which the power switching circuit can be used to output the first power supply 110 or the second power supply 120 to a power output port 200, so as to achieve the purpose of controlling the logic level to switch the power.
Referring to fig. 1, the power supply switching circuit in the present embodiment includes: a control signal port 300, a level shifter circuit 400, a first switch circuit 610, a second switch circuit 620, a first switch drive circuit 510, and a second switch drive circuit 520.
In this embodiment, the control signal port 300 is used for receiving a control signal, the level conversion circuit 400 is connected to the control signal port 300, and the level conversion circuit 400 is used for converting the control signal into a switching control signal. The first switch circuit 610 is connected between the first power supply 110 and the power output port 200, the second switch circuit 620 is connected between the second power supply 120 and the power output port 200, the first switch driving circuit 510 is connected with the first switch circuit 610 and the level shifter circuit 400, the second switch driving circuit 520 is connected with the second switch circuit 620 and the level shifter circuit 400, and the first switch driving circuit 510 is configured to receive a switch control signal and control the on-off state of the first switch circuit 610 according to the switch control signal; the second switch driving circuit 520 is configured to receive the switch control signal and control the on-off state of the first switch circuit 610 according to the switch control signal; wherein the first switching circuit 610 and the second switching circuit 620 are not turned on at the same time.
In this embodiment, the first switch circuit 610 is connected between the first power supply 110 and the power output port 200, the second switch circuit 620 is connected between the second power supply 120 and the power output port 200, and the level conversion circuit 400 converts the control signal provided by the control signal port 300 into a switch control signal, so as to realize the conversion of the logic level of the control signal port 300, and convert the control signal in the logic level form into a switch control signal in the drive power form; the first switch driving circuit 510 controls the on-off state of the first switch circuit 610 according to the switch control signal, the second switch driving circuit 520 controls the on-off state of the first switch circuit 610 according to the switch control signal, and the first switch circuit 610 and the second switch circuit 620 are not simultaneously turned on, so that two mutually exclusive power supplies are controlled through the control pin of the main control chip, and the problem that the current power supply switching scheme cannot realize power supply switching based on logic level is solved.
In one embodiment, referring to fig. 2, the power switching circuit further includes a first unidirectional conduction circuit 710, where the first unidirectional conduction circuit 710 is connected between the power output port 200 and the first switching circuit 610, and by providing the first unidirectional conduction circuit 710, the current of the power output port 200 can be prevented from flowing backward to the first switching circuit 610.
In one embodiment, referring to fig. 2, the power switching circuit further includes a second unidirectional conduction circuit 720, where the second unidirectional conduction circuit 720 is connected between the power output port 200 and the second switching circuit 620, and by providing the second unidirectional conduction circuit 720, the current of the power output port 200 can be prevented from flowing backward to the second switching circuit 620.
In one embodiment, referring to fig. 3, the first switching circuit 610 includes a first resistor R1, a second resistor R2, and a first switching tube Q1, where a first end of the first resistor R1 and a first end of the first switching tube Q1 are commonly connected to the first power supply 110, a second end of the first resistor R1, a first end of the second resistor R2, and a control end of the first switching tube Q1 are commonly connected, a second end of the first switching tube Q1 is connected to the power output port 200, and a second end of the second resistor R2 is connected to the first switch driving circuit 510.
In this embodiment, the first resistor R1, the second resistor R2, and the first switching tube Q1 form a switching circuit, the first resistor R1 and the second resistor R2 form a voltage dividing circuit, which is configured to provide a control voltage for the control end of the first switching tube Q1, and the voltage dividing signal output by the voltage dividing circuit formed by the first resistor R1 and the second resistor R2 can be controlled by the first switch driving circuit 510.
In one embodiment, the first switching transistor Q1 may be a P-type MOS transistor.
In one embodiment, referring to fig. 3, the first switch driving circuit 510 includes a second switch tube Q2, a first end of the second switch tube Q2 is connected to the first switch circuit 610, a second end of the second switch tube Q2 is grounded, and a control end of the second switch tube Q2 is connected to the level conversion circuit 400.
In this embodiment, the voltage at the control terminal of the second switching tube Q2 is determined by the voltage at the output terminal of the level shifter circuit 400, the second switching tube Q2 is turned on or off according to the voltage at the control terminal thereof, when the second switching tube Q2 is turned on, the voltage at the control terminal of the first switching circuit 610 is pulled down, and when the second switching tube Q2 is turned off, the voltage at the control terminal of the first switching circuit 610 is pulled up.
In one embodiment, referring to fig. 3, the level shifter circuit 400 includes a third switching transistor Q3, a third resistor R3, a first power supply port VDD1, and a second power supply port VDD2; the first end of the third switching tube Q3 is connected with the control signal port 300, the control end of the third switching tube Q3 is connected with the first power supply port VDD1, the second end of the third switching tube Q3 and the first end of the third resistor R3 are commonly connected to serve as the output end of the level conversion circuit 400, and the second end of the third resistor R3 is connected with the second power supply port VDD2; wherein the voltage of the first power supply port VDD1 is smaller than the voltage of the second power supply port VDD 2.
In this embodiment, the voltage of the first power supply port VDD1 may be used to control the on and off of the third switching tube Q3, the third resistor R3 may be used as a pull-up resistor, and the output voltage of the level shift circuit 400 is provided to the output terminal of the level shift circuit 400 through the second power supply port VDD2, and is controlled by the on and off of the third switching tube Q3, and when the third switching tube Q3 is turned off, the voltage of the output terminal of the level shift circuit 400 is determined by the voltage of the second power supply port VDD2, and when the third switching tube Q3 is turned on, the voltage of the output terminal of the level shift circuit 400 is determined by the voltage of the control signal port 300.
By setting the voltage of the first power supply port VDD1 slightly higher than the high-level voltage supplied from the control signal port 300, the third switching transistor Q3 is turned on when the control signal supplied from the control signal port 300 is at a low level, the voltage at the output terminal of the level shift circuit 400 is pulled down, and the third switching transistor Q3 is turned off when the control signal supplied from the control signal port 300 is at a high level, and the voltage at the output terminal of the level shift circuit 400 is pulled up, thereby realizing signal type shift of the logic level supplied from the control signal port 300.
In one embodiment, the third switching tube Q3 is an N-type MOS tube.
In one embodiment, the voltage of the first power supply port VDD1 may be set to 1.8V and the voltage of the second power supply port VDD2 may be set to 5V.
In one embodiment, referring to fig. 3, the second switch driving circuit 520 includes a fourth switching tube Q4, a fifth switching tube Q5, a fourth resistor R4, a fifth resistor R5, and a third power supply port VDD3; the first end of the fourth resistor R4 is connected with the third power supply port VDD3, the second end of the fourth resistor R4, the first end of the fifth resistor R5, the first end of the fourth switching tube Q4 and the control end of the fifth switching tube Q5 are commonly connected, the second end of the fifth resistor R5 is grounded, the second end of the fourth switching tube Q4 is grounded, the control end of the fourth switching tube Q4 is connected with the level conversion circuit 400, the first end of the fifth switching tube Q5 is connected with the second switching circuit 620, and the second end of the fifth switching tube Q5 is grounded.
In this embodiment, the on and off of the fourth switching tube Q4 may be determined by the voltage of the output end of the level conversion circuit 400, where the voltage of the gate of the fifth switching tube Q5 is pulled high and the fifth switching tube Q5 is turned on when the second switching circuit 620 is turned on and the first switching circuit 610 is turned off, so as to implement mutual exclusion between the first power supply 110 and the second power supply 120. When the fourth switching tube Q4 is turned on, the second switching tube Q2 is turned on, the first switching circuit 610 is turned on, the voltage of the gate of the fifth switching tube Q5 is pulled down, the fifth switching tube Q5 is turned off, and at this time, the second switching circuit 620 is turned off, so as to implement mutual exclusion between the first power supply 110 and the second power supply 120.
In one embodiment, referring to fig. 3, the second switching circuit 620 includes a sixth resistor R6, a seventh resistor R7, and a sixth switching tube Q6; the first end of the sixth resistor R6 is connected to the second switch driving circuit 520, the second end of the sixth resistor R6, the first end of the seventh resistor R7, and the control end of the sixth switching tube Q6 are commonly connected, the first end of the sixth switching tube Q6 and the second end of the seventh resistor R7 are commonly connected to the second power supply 120, and the second end of the sixth switching tube Q6 is connected to the power output port 200.
In this embodiment, the sixth resistor R6, the seventh resistor R7, and the sixth switching tube Q6 form a switching circuit, the sixth resistor R6 and the seventh resistor R7 form a voltage dividing circuit for providing a control voltage for the control end of the sixth switching tube Q6, and the voltage dividing signal output by the voltage dividing circuit formed by the sixth resistor R6 and the seventh resistor R7 can be controlled by the second switch driving circuit 520.
In one embodiment, the sixth switching tube Q6 may be a P-type MOS tube.
In one embodiment, the voltage of the second power supply 120 is greater than the voltage of the first power supply 110.
In one embodiment, the first unidirectional conduction circuit 710 may include a first diode D1, a cathode of the first diode D1 is connected to the power output port 200, and an anode of the first diode D1 is connected to the first switching circuit 610.
In one embodiment, the second unidirectional conduction circuit 720 may include a second diode D2, a cathode of the second diode D2 is connected to the power output port 200, and an anode of the second diode D2 is connected to the second switching circuit 620.
In one embodiment, the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, and the fifth switching tube Q5 are all N-type MOS tubes, and the power switching circuit in this embodiment is described with reference to the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, and the fifth switching tube Q5 being N-type MOS tubes, the voltage of the second power supply port VDD2 being +5v, the voltage of the first power supply port VDD1 being +1.8v, the voltage of the third power supply port VDD3 being +12v, the voltage of the first power supply 110 being +50v, and the voltage of the second power supply 120 being +90v.
When the level of the control signal port 300 is at a high level, the voltage at the V0 node is +5v after passing through the level conversion circuit 400, the V0 node is connected to the gates of the second switching tube Q2 and the fourth switching tube Q4, and since the sources of the second switching tube Q2 and the fourth switching tube Q4 are both grounded GND, the gate-source voltage Vgs2 of the second switching tube Q2 is equal to the gate-source voltage Vgs4 of the fourth switching tube Q4, and Vgs 2=vgs 4=5v, and the gate-source voltages Vgs2 of the second switching tube Q2 and Vgs4 of the fourth switching tube Q4 are greater than the turn-on voltages Vgs (th) 2, vgs (th) 4 of the second switching tube Q2 and the fourth switching tube Q4, respectively, and the drains and the sources of the second switching tube Q2 and the fourth switching tube Q4 are turned on. After the fourth switching tube Q4 is turned on, the voltage at the node V2 is 0V, so that the gate-source voltage Vgs 5=0 of the fifth switching tube Q5, the fifth switching tube Q5 is not turned on, the level of the node V3 is +90v, the gate-source voltage Vgs6 of the sixth switching tube Q6 is approximately 0V, the sixth switching tube Q6 is not turned on, and the +90v power provided by the second power supply 120 cannot be output from the power output port 200.
In this embodiment, the first power supply 110 is connected to the first resistor R1, the second resistor R2 and the second switching tube Q2 to form a voltage dividing network, the +50v power supplied by the first power supply 110 is grounded through the first resistor R1, the second resistor R2 and the second switching tube Q2, the level at the node V1 is 50v×r2/(r1+r2), that is, the gate-source voltage vgs=50v×r2/(r1+r2) -50v=50v=v1/(r1+r2), which is smaller than the turn-on voltage Vgs (th) 1 of the first switching tube Q1, and the +50v power supplied by the first power supply 110 can be output from the power output port 200, and the output voltage vout= +50v-Vd1, where Vd1 is the voltage drop of the first diode D1 in the first unidirectional current circuit 710.
When the level of the control signal port 300 is at the low level, the voltage at the node V0 is 0V after passing through the level conversion circuit 400, the node V0 is connected to the gates of the second switching tube Q2 and the fourth switching tube Q4, respectively, and since the sources of the second switching tube Q2 and the fourth switching tube Q4 are both grounded GND, the gate-source voltage Vgs2 of the second switching tube Q2 is equal to the gate-source voltage Vgs4 of the fourth switching tube Q4, and Vgs 2=vgs 4=0v, the gate-source voltage Vgs2 of the second switching tube Q2, the gate-source voltage Vgs4 of the fourth switching tube Q4 is smaller than the turn-on voltage Vgs (th) 2 of the second switching tube Q2 and the turn-on voltage Vgs (th) 4 of the fourth switching tube Q4, and the drains and sources of the second switching tube Q2 and the fourth switching tube Q4 are not turned on. The level at the node V1 is +50v, that is, the gate source Vgs 1=0v of the first switching tube Q1, the first switching tube Q1 is not turned on, and the +50v power cannot be output from the power output port 200.
The +12v power supply provided by the third power supply port VDD3 is connected to the fourth resistor R4 and the fifth resistor R5 to form a voltage dividing network, at this time, the level at the node V2 is 12v×r5/(r4+r5), the source of the fifth switching tube Q5 is grounded, the gate-source voltage Vgs 5=12 v×r5/(r4+r5) of the fifth switching tube Q5 is greater than the turn-on voltage Vgs (th) 5 of the fifth switching tube Q5, the drain of the fifth switching tube Q5 is connected to the ground GND of the source, the +90v power supply provided by the second power supply 120 is connected to the seventh resistor R7 and the sixth resistor R6 to form a voltage dividing network, at this time, the level at the node V3 is 90v×r6/(r6+r7), that is, the gate-source voltage Vgs 6=90 v×r6/(r6+r7) of the sixth switching tube Q6, that is, the gate-source voltage Vgs 6=90 v×r6/(r6+r7) -90 v=v7 is greater than the turn-on voltage Vgs (v6+v7) of the fifth switching tube Q5 is smaller than the turn-on voltage Vd2, and the seventh switching tube Q5 is outputted from the drain of the seventh switching tube.
The Shen Shili also provides a power supply assembly comprising a power supply switching circuit according to any one of the embodiments described above.
The Shen Shili further provides a test apparatus comprising a power switching circuit according to any one of the embodiments described above.
In some embodiments, the test device in this embodiment may be a board card tester or a semiconductor test apparatus, in specific applications, the test device needs to perform various functional tests on a board card to be tested or a device to be tested, in different functional tests, the required voltage of the test device is different, for example, in some functional tests, high voltage output needs to be met, in other functional tests, low voltage output needs to be met, and by integrating the power supply switching circuit in the above embodiment in the test device, two power supplies can be controlled by a control pin of a main control chip to select one of the power supply outputs according to test requirements, so as to realize efficient switching of power supplies in the system.
Compared with the prior art, the embodiment of the application has the beneficial effects that: the first switching circuit is connected between the first power supply and the power supply output port, the second switching circuit is connected between the second power supply and the power supply output port, and the level conversion circuit converts the control signal provided by the control signal port into a switching control signal; the first switch driving circuit controls the on-off state of the first switch circuit according to the switch control signal, the second switch driving circuit controls the on-off state of the first switch circuit according to the switch control signal, and the first switch circuit and the second switch circuit are not conducted simultaneously, so that two mutually exclusive power supplies are controlled through the control pin of the main control chip, and the problem that the current power supply switching scheme cannot realize power supply switching based on logic level is solved.
It will be apparent to those skilled in the art that the foregoing functional units and circuits are merely illustrated for convenience and brevity of description, and in practical application, the foregoing functional allocation may be performed by different functional units and circuits, that is, the internal structure of the apparatus is divided into different functional units or circuits, so as to perform all or part of the functions described above. The functional units and circuits in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and the circuits are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and circuits in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of circuits or elements is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application 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 application, and are intended to be included in the scope of the present application.
Claims (10)
1. A power switching circuit connected to a first power source and a second power source for outputting the first power source or the second power source to a power output port, the power switching circuit comprising:
A control signal port for receiving a control signal;
The level conversion circuit is connected with the control signal port and used for converting the control signal into a switch control signal;
The first switch circuit is connected between the first power supply and the power supply output port;
The second switch circuit is connected between the second power supply and the power supply output port;
The first switch driving circuit is connected with the first switch circuit and the level conversion circuit and is used for receiving the switch control signal and switching on and off states of the first switch circuit according to the switch control signal;
the second switch driving circuit is connected with the second switch circuit and the level conversion circuit and is used for receiving the switch control signal and switching on and off states of the first switch circuit according to the switch control signal; wherein the first switch circuit and the second switch circuit are not turned on at the same time.
2. The power switching circuit of claim 1, wherein the power switching circuit further comprises:
The first unidirectional conduction circuit is connected between the power output port and the first switch circuit and is used for preventing current of the power output port from flowing backwards to the first switch circuit.
3. The power switching circuit of claim 1, wherein the power switching circuit further comprises:
And the second unidirectional conduction circuit is connected between the power output port and the second switch circuit and is used for preventing the current of the power output port from flowing backwards to the second switch circuit.
4. The power switching circuit according to claim 1, wherein the first switching circuit comprises a first resistor, a second resistor, a first switching tube;
The first end of the first resistor, the first end of the first switch tube are connected to the first power supply in a sharing mode, the second end of the first resistor, the first end of the second resistor and the control end of the first switch tube are connected in a sharing mode, the second end of the first switch tube is connected with the power supply output port, and the second end of the second resistor is connected with the first switch driving circuit.
5. The power switching circuit according to claim 1, wherein the first switch driving circuit includes a second switch tube, a first end of the second switch tube is connected to the first switch circuit, a second end of the second switch tube is grounded, and a control end of the second switch tube is connected to the level conversion circuit.
6. The power switching circuit according to claim 1, wherein the level shifter circuit comprises a third switching tube, a third resistor, a first power supply port, a second power supply port;
The first end of the third switching tube is connected with the control signal port, the control end of the third switching tube is connected with the first power supply port, the second end of the third switching tube and the first end of the third resistor are commonly connected to serve as the output end of the level conversion circuit, and the second end of the third resistor is connected with the second power supply port; wherein the voltage of the first power supply port is smaller than the voltage of the second power supply port.
7. The power switching circuit according to claim 1, wherein the second switch driving circuit includes a fourth switching tube, a fifth switching tube, a fourth resistor, a fifth resistor, and a third power supply port;
The first end of the fourth resistor is connected with the third power supply port, the second end of the fourth resistor, the first end of the fifth resistor, the first end of the fourth switching tube and the control end of the fifth switching tube are commonly connected, the second end of the fifth resistor is grounded, the second end of the fourth switching tube is grounded, the control end of the fourth switching tube is connected with the level conversion circuit, the first end of the fifth switching tube is connected with the second switching circuit, and the second end of the fifth switching tube is grounded.
8. The power switching circuit according to claim 1, wherein the second switching circuit comprises a sixth resistor, a seventh resistor, a sixth switching tube;
The first end of the sixth resistor is connected with the second switch driving circuit, the second end of the sixth resistor, the first end of the seventh resistor and the control end of the sixth switching tube are connected together, the first end of the sixth switching tube and the second end of the seventh resistor are connected together to the second power supply, and the second end of the sixth switching tube is connected with the power supply output port.
9. A power supply assembly comprising a power supply switching circuit according to any one of claims 1-8.
10. A test apparatus comprising a power switching circuit as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323541598.9U CN221408676U (en) | 2023-12-22 | 2023-12-22 | Power supply switching circuit, power supply assembly and test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323541598.9U CN221408676U (en) | 2023-12-22 | 2023-12-22 | Power supply switching circuit, power supply assembly and test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221408676U true CN221408676U (en) | 2024-07-23 |
Family
ID=91935967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323541598.9U Active CN221408676U (en) | 2023-12-22 | 2023-12-22 | Power supply switching circuit, power supply assembly and test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221408676U (en) |
-
2023
- 2023-12-22 CN CN202323541598.9U patent/CN221408676U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100336236B1 (en) | Semiconductor integrated circuit device | |
| US11418171B2 (en) | Low power consumption switching circuit with voltage isolation function for PMOS transistor bulk, and integrated chip | |
| US6242948B1 (en) | Semiconductor integrated circuit device | |
| CN219627368U (en) | Low-voltage-drop unidirectional power supply polarity conversion circuit, power supply equipment and electronic equipment | |
| CN116405016A (en) | Low-voltage PMOS switch circuit, system, control method and control device | |
| US6717456B2 (en) | Level conversion circuit | |
| CN221408676U (en) | Power supply switching circuit, power supply assembly and test equipment | |
| CN216749261U (en) | Positive and negative voltage power supply circuit and image signal generator | |
| CN102006055B (en) | Negative level high voltage shift circuit | |
| CN112653431A (en) | Low-voltage latch circuit | |
| CN101083463A (en) | Apparatus and method for bidirectional level conversion | |
| CN117827719A (en) | Input/output circuit | |
| CN102638254B (en) | Low leakage power detection device, system and method | |
| CN112615419B (en) | Dual-power automatic switching circuit | |
| CN116796679A (en) | A multi-voltage domain CMOS IO design | |
| CN110932716B (en) | Cross-voltage domain selectable built-in pull-up resistor multiplexing system | |
| CN103312313A (en) | rail to rail enable signal and level conversion circuit | |
| CN113364448A (en) | Gate voltage and substrate voltage following CMOS tri-state gate circuit | |
| CN220043050U (en) | Power supply switching circuit and electronic equipment | |
| CN222563537U (en) | Quick turn-off protection circuit | |
| CN115201550B (en) | High-voltage input detection circuit | |
| CN100359502C (en) | Mixed logic level bidirectional bus converter and connection method | |
| CN222281217U (en) | A circuit based on I2C bus | |
| CN216819693U (en) | Isolation voltage driving circuit and electronic device | |
| US12184235B2 (en) | Amplifier having improved slew rate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |