CN112671072A - Power supply device and electronic equipment - Google Patents
Power supply device and electronic equipment Download PDFInfo
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- CN112671072A CN112671072A CN202110019442.0A CN202110019442A CN112671072A CN 112671072 A CN112671072 A CN 112671072A CN 202110019442 A CN202110019442 A CN 202110019442A CN 112671072 A CN112671072 A CN 112671072A
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Abstract
The invention relates to a power supply device and an electronic apparatus, comprising: the power supply device comprises a first power supply input end, a second power supply input end, a power supply output end and a driving power supply unit; the control unit is connected with the alarm unit of the control unit; the first driving unit and the second driving unit are connected with the control unit and the driving power supply unit; the first power switch and the second power switch are connected in series between the first power supply input end and the power supply output end, and the third driving unit is connected with a series node of the first power switch and the second power switch; the third power switch and the fourth power switch are connected in series between the second power supply input end and the power supply output end, and the fourth driving unit is connected with a series node of the third power switch and the fourth power switch. The invention can realize the alarm of the power supply circuit and improve the use safety.
Description
Technical Field
The present invention relates to power supply technologies, and in particular, to a power supply device and an electronic apparatus.
Background
For some electronic devices, such as 36V powered lawn mowers, their power needs to be supplied by batteries because their usage scenarios are outdoor. In order to improve the cruising time, two battery packs are generally adopted to supply power to the battery pack, and when one battery pack is completely consumed, the other battery pack is switched to supply power. In the battery pack power supply, the power supply circuit is usually a power supply circuit for switching the battery pack by switching a power tube, and once a problem occurs in the power tube, the power tube cannot be quickly identified. There is a risk that continued use will occur.
Disclosure of Invention
The present invention is directed to a power supply device and an electronic apparatus, which overcome some of the above technical drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a power supply apparatus comprising: the power supply device comprises a first power supply input end, a second power supply input end, a power output end and a driving power supply unit, wherein the first power supply input end can be connected with a first battery pack, the second power supply input end can be connected with a second battery pack, and the driving power supply unit is used for providing power output and outputting driving power supply voltage; and
a control unit configured to be in a first state, a second state or a third state, wherein the control unit outputs a first control level in the first state, outputs a second control level in the second state, and outputs none of the first control level or the second control level in the third state;
the alarm unit is connected with the control unit and used for receiving the alarm driving level of the control unit to act;
the first driving unit is connected with the control unit and the driving power supply unit and used for outputting a first driving level when receiving the first control level;
the second driving unit is connected with the control unit and the driving power supply unit and used for outputting a second driving level when receiving the second control level;
a first power switch and a second power switch connected in series between the first power supply input terminal and the power supply output terminal, wherein the first power switch and the second power switch are respectively turned on when both the first driving unit is connected to receive the first driving level;
a third driving unit which is connected to a series node of the first power switch and the second power switch and outputs a third driving level when the first power switch or the second power switch is turned on;
a third power switch and a fourth power switch connected in series between the second power supply input terminal and the power supply output terminal, wherein the third power switch and the fourth power switch are respectively turned on when both the third power switch and the fourth power switch are connected to the second driving unit to receive the second driving level;
a fourth driving unit which is connected to a series node of the third power switch and the fourth power switch and outputs a fourth driving level when the third power switch or the fourth power switch is turned on;
the control unit is connected to the third driving unit and the fourth driving unit, and configured to output the alert driving level when the third state and the third driving level or the fourth driving level are received, output the alert driving level when the second state and the third driving level are received, or output the alert driving level when the first state and the fourth driving level are received.
Preferably, the power supply device of the present invention further includes a voltage detection unit, connected to the power output terminal, for generating a detection level when there is a voltage output at the power output terminal;
the control unit is connected with the voltage detection unit and is configured to output the alarm driving level when the detection level is received in the third state; or
Outputting the alert drive level when in the first state or the second state and without the detection level.
Preferably, the voltage detection unit includes a resistor R115 and a resistor R125; one end of the resistor R115 is connected with the power output end after the resistor R125 is connected in series, the other end of the resistor R115 is grounded, and the series node of the resistor R115 and the resistor R125 is connected with the control unit.
Preferably, the first driving unit includes a first driving switch connected to the first power switch, and a second driving switch connected to the second power switch.
Preferably, the first power switch comprises a plurality of first MOS transistors, a diode D19, a voltage regulator tube Z1, a resistor R80 and a resistor R43; the sources of the first MOS transistors are connected with each other and then connected with the second power switch, the first end of the resistor R80 and the anode of the voltage regulator tube Z1, the drains of the first MOS transistors are connected with each other and then connected with the first power supply input end, the gates of the first MOS transistors are connected with each other and then connected with the anode of the diode D19, the second end of the resistor R80, the first end of the resistor R43 and the cathode of the voltage regulator tube Z1, and the cathode of the diode D19 and the second end of the resistor R43 are respectively connected with the first drive switch; and/or
The second power switch comprises a plurality of second MOS tubes, a diode D21, a voltage regulator tube Z4, a resistor R82 and a resistor R60, wherein the sources of the second MOS tubes are connected with each other and then are connected with the first power switch, the anode of the voltage regulator tube Z4 and the first end of the resistor R82, the drains of the second MOS tubes are connected with each other and then are connected with the power output end, the gates of the second MOS tubes are connected with the anode of the diode D21, the cathode of the voltage regulator tube Z4, the second end of the resistor R82 and the first end of the resistor R60, and the cathode of the diode D21 and the second end of the resistor R60 are connected with the second drive switch; and/or
The first driving switch includes: the transistor Q18, the MOS tube Q19, the voltage regulator tube Z5, the resistor R39, the resistor R56 and the resistor R49; the base electrode of the triode Q18 is respectively connected with the first end of the resistor R49 and the control unit, the second end of the resistor R49 is grounded, the emitter electrode of the triode Q18 is grounded, the collector electrode of the triode Q18 is connected with the grid electrode of the MOS tube Q19 through the resistor R56, the drain electrode of the MOS tube Q19 is respectively connected with the driving power supply unit, the cathode of the voltage regulator Z5 and the first end of the resistor R39, the anode of the voltage regulator Z5 is connected with the second end of the resistor R39 and then connected with the grid electrode of the MOS tube Q19, and the source electrode of the MOS tube Q19 is connected with the first power switch; and/or
The second driving switch includes: the transistor Q22, the MOS tube Q23, the voltage regulator tube Z6, the resistor R61, the resistor R20 and the resistor R65; the base electrode of the triode Q22 is respectively connected with the first end of the resistor R65 and the control unit, the second end of the resistor R65 is grounded, the emitter electrode of the triode Q22 is grounded, the collector electrode of the triode Q22 is connected with the grid electrode of the MOS tube Q23 through the resistor R20, the drain electrode of the MOS tube Q23 is respectively connected with the driving power supply unit, the cathode of the voltage regulator Z6 and the first end of the resistor R61, the anode of the voltage regulator Z6 is connected with the second end of the resistor R61 and then connected with the grid electrode of the MOS tube Q23, and the source electrode of the MOS tube Q23 is connected with the second power switch.
Preferably, the third driving unit includes a first switching unit and a second switching unit; the first end of the first switch unit is connected with the control unit, the second end of the first switch unit is connected with the series node of the first power switch and the second power switch, the third end of the first switch unit is connected with the first end of the second switch unit, the second end of the second switch unit is grounded, and the third end of the second switch unit is connected with the control unit.
Preferably, the first switch unit comprises a transistor Q3, a MOS transistor Q4, a regulator tube Z10, a resistor R1, a resistor R13 and a resistor R17; the base electrode of the triode Q3 is connected with the control unit, the base electrode of the triode Q3 is grounded through the resistor R13, the emitter electrode of the triode Q3 is grounded, the collector electrode of the triode Q3 is respectively connected with the grid electrode of the MOS tube Q4, the anode electrode of the voltage regulator tube Z10 and the first end of the resistor R1 through the resistor R17, the drain electrode of the MOS tube Q4 is respectively connected with the cathode electrode of the voltage regulator tube Z10, the second end of the resistor R1 and the series node of the first power switch and the second power switch, and the source electrode of the MOS tube Q4 is connected with the first end of the second switch unit; and/or
The second switch unit comprises a triode Q35, a resistor R21, a resistor R23 and a capacitor C31; the base of triode Q35 is connected the first end of resistance R21 with the first end of resistance R23, the second end of resistance R21 is connected respectively the third end of first switch unit with the first end of electric capacity C31, the second end of electric capacity C31 with the second end of resistance R23 is ground connection respectively, triode Q35's emitting electrode ground connection, triode Q35's collecting electrode is connected respectively control unit and a direct current power supply.
Preferably, a power supply device of the present invention further includes a fifth driving unit; the input end of the fifth driving unit is connected with the third end of the first switch unit, and the output end of the fifth driving unit is connected with the second driving unit.
Preferably, the fifth driving unit comprises a MOS transistor Q17, a resistor R112, a resistor R113, a capacitor C33, a diode D4 and a diode D7;
the gate of the MOS transistor Q17 is connected to the third terminal of the first switch unit through the resistor R112, the gate of the MOS transistor Q17 is further connected to the resistor R113 and the capacitor C33 in parallel, the source of the MOS transistor Q17 is grounded, the drain of the MOS transistor Q17 is connected to the cathodes of the diode D4 and the diode D7, and the anodes of the diode D4 and the diode D7 are connected to the second drive unit.
Preferably, the second driving unit includes a third driving switch connected to the third power switch, and a fourth driving switch connected to the fourth power switch.
Preferably, the third power switch comprises a plurality of third MOS transistors, a diode D18, a voltage regulator tube Z2, a resistor R110 and a resistor R48; the sources of the plurality of third MOS transistors are connected with each other and then connected with the fourth power switch, the first end of the resistor R110 and the anode of the voltage regulator tube Z2, the drains of the plurality of third MOS transistors are connected with each other and then connected with the second power supply input end, the gates of the plurality of third MOS transistors are connected with each other and then connected with the anode of the diode D18, the second end of the resistor R110, the first end of the resistor R48 and the cathode of the voltage regulator tube Z2, and the cathode of the diode D18 and the second end of the resistor R48 are respectively connected with the third driving switch; and/or
The fourth power switch comprises a plurality of fourth MOS tubes, a diode D31, a voltage regulator tube Z3, a resistor R12 and a resistor R117, sources of the fourth MOS tubes are connected with each other and then are connected with the third power switch, an anode of the voltage regulator tube Z3 and a first end of the resistor R117, drains of the fourth MOS tubes are connected with each other and then are connected with the power output end, gates of the fourth MOS tubes are connected with an anode of the diode D21, a cathode of the voltage regulator tube Z4, a second end of the resistor R117 and a first end of the resistor R12, and a cathode of the diode D31 and a second end of the resistor R12 are connected with the fourth driving switch; and/or
The third driving switch includes: the transistor Q14, the MOS tube Q15, the voltage regulator tube Z8, the resistor R38, the resistor R53 and the resistor R41; the base electrode of the triode Q14 is respectively connected with the first end of the resistor R41 and the control unit, the second end of the resistor R41 is grounded, the emitter electrode of the triode Q14 is grounded, the collector electrode of the triode Q14 is connected with the gate electrode of the MOS transistor Q15 through the resistor R53, the drain electrode of the MOS transistor Q15 is respectively connected with the driving power supply unit, the cathode of the regulator Z8 and the first end of the resistor R38, the anode of the regulator Z8 is connected with the second end of the resistor R38 and then connected with the gate electrode of the MOS transistor Q15, and the source electrode of the MOS transistor Q15 is connected with the third power switch; and/or
The fourth driving switch includes: the transistor Q20, the MOS tube Q24, the voltage regulator tube Z9, the resistor R63, the resistor R25 and the resistor R16; the base electrode of the triode Q20 is respectively connected with the first end of the resistor R16 and the control unit, the second end of the resistor R16 is grounded, the emitter electrode of the triode Q20 is grounded, the collector electrode of the triode Q20 is connected with the grid electrode of the MOS tube Q24 through the resistor R25, the drain electrode of the MOS tube Q24 is respectively connected with the driving power supply unit, the cathode of the voltage regulator Z9 and the first end of the resistor R63, the anode of the voltage regulator Z9 is connected with the second end of the resistor R63 and then connected with the grid electrode of the MOS tube Q24, and the source electrode of the MOS tube Q24 is connected with the fourth power switch.
Preferably, the fourth driving unit includes a third switching unit and a fourth switching unit; the first end of the third switch unit is connected with the control unit, the second end of the third switch unit is connected with the series node of the third power switch and the fourth power switch, the third end of the third switch unit is connected with the first end of the fourth switch unit, the second end of the fourth switch unit is grounded, and the third end of the fourth switch unit is connected with the control unit.
Preferably, the third switching unit comprises a triode Q5, a MOS transistor Q5, a voltage regulator Z14, a resistor R19, a resistor R22 and a resistor R27; the base electrode of the triode Q5 is connected with the control unit, the base electrode of the triode Q5 is grounded through the resistor R22, the emitter electrode of the triode Q5 is grounded, the collector electrode of the triode Q5 is respectively connected with the grid electrode of the MOS tube Q1, the anode electrode of the voltage regulator tube Z11 and the first end of the resistor R19 through the resistor R27, the drain electrode of the MOS tube Q5 is respectively connected with the cathode electrode of the voltage regulator tube Z11, the second end of the resistor R19 and the series node of the third power switch and the fourth power switch, and the source electrode of the MOS tube Q5 is connected with the first end of the fourth switching unit; and/or
The fourth switching unit comprises a triode Q37, a resistor R145, a resistor R47 and a capacitor C50;
the base electrode of the triode Q37 is respectively connected with the first end of the resistor R143 and the first end of the resistor R47, the second end of the resistor R143 is respectively connected with the third end of the third switching unit and the first end of the capacitor C50, the second end of the resistor R47 and the second end of the capacitor C50 are respectively grounded, the emitter electrode of the triode Q37 is grounded, and the collector electrode of the triode Q37 is connected with the control unit and a direct current power supply.
Preferably, a power supply device of the present invention further includes a sixth driving unit;
the input end of the sixth driving unit is connected with the third end of the third switching unit, and the output end of the sixth driving unit is connected with the first driving unit.
Preferably, the sixth driving unit comprises a MOS transistor Q21, a resistor R116, a resistor R118, a capacitor C34, a diode D5 and a diode D6;
the gate of the MOS transistor Q21 is connected to the third terminal of the third switching unit through the resistor R116, the gate of the MOS transistor Q21 is further connected to the ground through the resistor R118 and the capacitor C34, which are connected in parallel, the source of the MOS transistor Q21 is connected to the ground, the drain of the MOS transistor Q21 is connected to the cathodes of the diode D5 and the diode D6, and the anodes of the diode D5 and the diode D6 are respectively connected to the first driving unit.
Preferably, the alarm unit includes a plurality of light emitting diodes;
the anode of the light emitting diode is connected with a power supply, and the cathode of the light emitting diode is connected with the control unit.
The invention also provides an electronic device comprising the power supply device.
The power supply device and the electronic equipment have the following beneficial effects: the alarm of the power supply circuit can be realized, and the use safety is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a logic block diagram of one embodiment of a power supply apparatus of the present invention;
FIG. 2 is a logic diagram of another embodiment of a power supply apparatus according to the present invention;
FIG. 3 is a schematic diagram of a partial circuit of an embodiment of a power supply apparatus of the present invention;
FIG. 4 is a partial circuit schematic of another embodiment of a power supply apparatus of the present invention;
FIG. 5 is a partial circuit schematic of another embodiment of a power supply apparatus of the present invention;
FIG. 6 is a partial circuit schematic of another embodiment of a power supply apparatus of the present invention;
fig. 7 is a partial circuit schematic of another embodiment of a power supply apparatus of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of a power supply apparatus of the present invention, includes: a first power supply input terminal 110 connectable to a first battery pack, a second power supply input terminal 120 connectable to a second battery pack, a power output terminal 600 for providing a power output, and a driving power supply unit 500 for outputting a driving power supply voltage; and a control unit 400 configured to be in a first state, a second state or a third state, wherein the control unit 400 outputs a first control level in the first state, outputs a second control level in the second state, and outputs no first control level or second control level in the third state; a connection control unit 400 for receiving an alarm unit 700 acting at an alarm driving level of the control unit 400; a first driving unit 310 connected to the control unit 400 and the driving power supply unit 500 for outputting a first driving level when receiving the first control level; a second driving unit 320 connected to the control unit 400 and the driving power supply unit 500 for outputting a second driving level when receiving the second control level; a first power switch 211 and a second power switch 212 connected in series between the first power input terminal 110 and the power output terminal 600, wherein the first power switch 211 and the second power switch 212 are both connected to the first driving unit 310 to receive a first driving level and respectively conduct; a third driving unit 330 which connects a series node of the first power switch 211 and the second power switch 212 and outputs a third driving level when the first power switch 211 or the second power switch 212 is turned on; a third power switch 221 and a fourth power switch 222 connected in series between the second power input 210 and the power output 600, wherein the third power switch 221 and the fourth power switch 222 are both connected to the second driving unit 320 to receive the second driving level and respectively conduct; a fourth driving unit 340 connected to a series node of the third power switch 221 and the fourth power switch 222, and outputting a fourth driving level when the third power switch 221 or the fourth power switch 223 is turned on; the control unit 400 is connected to the third driving unit 330 and the fourth driving unit 340, and is configured to output the alert driving level when the third driving level or the fourth driving level is received in the third state, output the alert driving level when the third driving level is received in the second state, or output the alert driving level when the fourth driving level is received in the first state. Specifically, different battery packs may be connected through the first power supply input terminal 110 and the second power supply input terminal 120, the first power supply input terminal 110 is connected to the first battery pack and connected to the power output terminal 600 through the first power switch 211 and the second power switch 212 connected in series, which provides power output for the power output terminal 600 when the first power switch 211 and the second power switch 212 are turned on. The second power input terminal 120 is connected to the second battery pack and connected to the power output terminal 600 through the third power switch 221 and the fourth power switch 222, and provides power output for the power output terminal 600 when the third power switch 221 and the fourth power switch 222 are turned on. The control unit 400 is configured to have different states, which may be the first control level or the second control level, or may be neither the first control level nor the second control level. It is understood that the control level may selectively output the first control level or the second control level according to the states of the first battery pack and the second battery pack. Meanwhile, the control unit 400 may output an alarm driving level driving alarm unit 700 action alarm. The first driving unit 310 is connected to the control unit 400 and the first and second power switches 211 and 212, and generates a driving level to drive the first and second power switches 211 and 212 to be turned on when the control unit 400 outputs a first control level. The second driving unit 320 is connected to the control unit 400 and the third and fourth power switches 221 and 222, and generates a driving level to drive the third and fourth power switches 221 and 222 to be turned on when the control unit 400 outputs a second control level. The first driving unit 310 and the second driving unit 320 are both supplied with power by the driving power supply unit 500. The third driving unit 330 is connected to the first power switch 211 and the second power switch 212, and outputs a corresponding driving level according to on or off states of the first power switch 211 and the second power switch 212. When one or both of the first power switch 211 and the second power switch 212 are turned on, the corresponding output third driving level. The fourth driving unit 340 is connected to the third power switch 221 and the fourth power switch 222, and outputs a corresponding driving level according to on or off states of the third power switch 221 and the fourth power switch 222. When one or both of the third power switch 221 and the fourth power switch 222 are turned on, the corresponding output fourth driving level is set. The control unit 400 is connected to the third driving unit 330 and the fourth driving unit 340, receives the driving levels corresponding to the third driving unit 330 and the fourth driving unit 340, and obtains the determination results corresponding to the first power switch 211 and the second power switch 212, and the third power switch 221 and the fourth power switch 222 according to the driving levels and the control levels corresponding to the driving levels, that is, whether the first control level or the second control level is output. Normally, when the control unit 400 outputs the first control level, both the third power switch 221 and the fourth power switch 222 should be in an off state to prevent the current from flowing backward. If the fourth driving unit 340 outputs the fourth driving level at this time, the third power switch 221 and the fourth power switch 222 are considered to be abnormal, and the control unit 400 outputs the alert driving level to the alert unit 700. When the control unit 400 outputs the second control level, the first power switch 211 and the second power switch 212 should be in an off state to prevent the reverse flow of current. If the third driving unit 330 outputs the third driving level, the first power switch 211 and the second power switch 212 are considered to be abnormal, and the control unit 400 outputs the alarm driving level to the alarm unit 700. Namely, the monitoring and alarming of the abnormity in the circuit can be realized. If the control unit 400 is in the third state, and the first power switch 211, the second power switch 212, the third power switch 221, and the fourth power switch 222 are all in the off state at this time, and if the third driving level or the fourth driving level is received at this time, it is determined that there is an abnormality in the first power switch 211, the second power switch 212, the third power switch 221, and the fourth power switch 222, and an alarm is generated.
As shown in fig. 2, in an embodiment, the power supply apparatus of the present invention further includes a voltage detection unit 600 connected to the power output terminal 600 for generating a detection level when a voltage is output from the power output terminal 600; the control unit 400 is connected to the voltage detection unit 600 and configured to output an alarm driving level when receiving a detection level in a third state; or an alarm driving level is output in the first state or the second state and without the detection level. Specifically, under a normal condition, when the control unit 400 is in the third state, that is, when there is no first control level output or no second control level output, the first power switch 211, the second power switch 212, the third power switch 221, and the fourth power switch 222 are all in the off state in the normal state, at this time, the output level signal of the power output terminal 600 should be zero, and if the voltage output detected by the voltage detection unit 800 is received at this time, it is determined that one of the first power switch 211, the second power switch 212, the third power switch 221, and the fourth power switch 222 is short-circuited, and the link is abnormal, so that an alarm is generated. When the control unit 400 is in the first state or the second state, under a normal condition, the output level signal of the power output terminal 600 should have an output voltage, and if no voltage output is detected by the voltage detection unit 800, it is determined that the first power switch 211, the second power switch 212, the third power switch 221, and the fourth power switch 222 are abnormal, and an alarm is generated.
As shown in fig. 4, the voltage detection unit 800 includes a resistor R115 and a resistor R125; after the resistor R115 and the resistor R125 are connected in series, one end is connected to the power output terminal 600, the other end is grounded, and the series node of the resistor R115 and the resistor R125 is connected to the control unit 400. Specifically, the voltage is divided by serially connecting the resistor R115 and the resistor R125, and then the divided voltage is input to the control unit 400.
As shown in fig. 3, the alarm unit 700 includes a plurality of light emitting diodes; the anode of the led is connected to a power source, and the cathode of the led is connected to the control unit 400. Specifically, the alarm unit 700 includes a light emitting diode LED1 and a light emitting diode LED2, the light emitting diode LED1 and the light emitting diode LED2 are both double light emitting diodes, anodes thereof are both connected to a 3.3V power supply, and cathodes thereof are connected to a pin of the control unit 400 through connectors LEDA, LEDB, LED _ a, and LED _ B. The control unit 400 includes a control chip U2, which outputs an alarm driving level through a PF pin and a PA pin, and drives a light emitting diode to perform conversion of light emitting color for alarm indication.
As shown in fig. 4, in an embodiment, the first driving unit 310 includes a first driving switch 311 connected to the first power switch 211 and a second driving switch 312 connected to the second power switch 212. Specifically, it can be understood that the first driving switch 311 corresponds to the first power switch 211, and the second power switch 212 corresponds to the second driving switch 312, that is, each power switch is driven by a group of driving switches.
In one embodiment, the first power switch 211 includes a plurality of first MOS transistors, a diode D19, a regulator tube Z1, a resistor R80, and a resistor R43; the sources of the first MOS transistors are connected with each other and then connected with the second power switch 212, the first end of the resistor R80 and the anode of the voltage regulator tube Z1, the drains of the first MOS transistors are connected with each other and then connected with the first power supply input end 110, the gates of the first MOS transistors are connected with each other and then connected with the anode of the diode D19, the second end of the resistor R80, the first end of the resistor R43 and the cathode of the voltage regulator tube Z1, and the cathode of the diode D19 and the second end of the resistor R43 are respectively connected with the first drive switch 311; specifically, each power switch may include a plurality of power switch tubes, which may be connected in parallel, driven together by the first driving switch 311.
In an embodiment, the second power switch 212 includes a plurality of second MOS transistors, a diode D21, a voltage regulator Z4, a resistor R82, and a resistor R60, sources of the plurality of second MOS transistors are connected to each other and then connected to the first power switch 211, an anode of the voltage regulator Z4, and a first end of the resistor R82, drains of the plurality of second MOS transistors are connected to each other and then connected to the power output terminal 600, gates of the plurality of second MOS transistors are connected to each other and then connected to an anode of the diode D21, a cathode of the voltage regulator Z4, a second end of the resistor R82, and a first end of the resistor R60, and a cathode of the diode D21 and a second end of the resistor R60 are connected to the second driving switch 312; specifically, each power switch may include a plurality of power switching tubes, which may be connected in parallel, driven together by the second drive switch 312.
In one embodiment, the first driving switch 311 includes: the transistor Q18, the MOS tube Q19, the voltage regulator tube Z5, the resistor R39, the resistor R56 and the resistor R49; the base electrode of the triode Q18 is respectively connected with the first end of the resistor R49 and the control unit, the second end of the resistor R49 is grounded, the emitter electrode of the triode Q18 is grounded, the collector electrode of the triode Q18 is connected with the grid electrode of the MOS tube Q19 through the resistor R56, the drain electrode of the MOS tube Q19 is respectively connected with the driving power supply unit, the cathode of the voltage regulator Z5 and the first end of the resistor R39, the anode of the voltage regulator Z5 and the second end of the resistor R39 are connected with the grid electrode of the MOS tube Q19, and the source electrode of the MOS tube Q19 is connected with the first power switch 211; the transistor Q18 and the MOS transistor Q19 are turned on and off to output corresponding levels to the first power switch 211.
In one embodiment, the second driving switch 312 includes: the transistor Q22, the MOS tube Q23, the voltage regulator tube Z6, the resistor R61, the resistor R20 and the resistor R65; the base electrode of the triode Q22 is connected with the first end of the resistor R65 and the control unit respectively, the second end of the resistor R65 is grounded, the emitter electrode of the triode Q22 is grounded, the collector electrode of the triode Q22 is connected with the grid electrode of the MOS tube Q23 through the resistor R20, the drain electrode of the MOS tube Q23 is connected with the driving power supply unit, the cathode of the voltage regulator Z6 and the first end of the resistor R61 respectively, the anode of the voltage regulator Z6 and the second end of the resistor R61 are connected and then connected with the grid electrode of the MOS tube Q23, and the source electrode of the MOS tube Q23 is connected with the second power switch 212. The transistor Q22 and the MOS transistor Q23 are turned on and off to output corresponding levels to the second power switch 212.
As shown in fig. 5, in an embodiment, the third driving unit 330 includes a first switching unit 331 and a second switching unit 332; a first end of the first switch unit 331 is connected to the control unit 400, a second end of the first switch unit 331 is connected to a series node of the first power switch 211 and the second power switch 212, a third end of the first switch unit 331 is connected to a first end of the second switch unit 332, a second end of the second switch unit 332 is grounded, and a third end of the second switch unit 332 is connected to the control unit 400. Specifically, the third driving unit 330 is formed by connecting two stages of switch units, an input terminal of the first switch unit 331 is connected to the first power switch 211 and the second power switch 212, and when the first power switch 211 and the second power switch 212 are turned on, a voltage is input, a control terminal of the first switch unit 331 is connected to the control unit 400, and receives a control level of the control unit 400 to turn on or off, when the first switch unit 331 is turned on, an output terminal thereof has a voltage output to a control terminal of the second switch unit 332, and when the second switch unit 332 receives the voltage output, the second switch unit 332 is turned on, and an output driving level corresponding to the output terminal thereof, that is, a corresponding fourth driving level. On the contrary, when the first power switch 211 and the second power switch 212 are turned off, the input terminal of the first switch unit 331 has no voltage input, the first switch unit 331 is turned off, and the output terminal thereof has no voltage output, at this time, the control terminal of the second switch unit 332 has no voltage input and maintains the off state, and at this time, the output terminal thereof outputs the third driving level.
In a specific embodiment, the first switch unit 331 includes a transistor Q3, a MOS transistor Q4, a regulator tube Z10, a resistor R1, a resistor R13, and a resistor R17; the base electrode of the triode Q3 is connected with the control unit 400, the base electrode of the triode Q3 is grounded through a resistor R13, the emitter electrode of the triode Q3 is grounded, the collector electrode of the triode Q3 is respectively connected with the grid electrode of the MOS tube Q4, the anode of the voltage regulator tube Z10 and the first end of the resistor R1 through a resistor R17, the drain electrode of the MOS tube Q4 is respectively connected with the cathode of the voltage regulator tube Z10, the second end of the resistor R1 and the serial node of the first power switch 211 and the second power switch 212, and the source electrode of the MOS tube Q4 is connected with the first end of the second switch unit 332; specifically, the transistor Q3 is turned on after receiving the control level of the control unit 400, when the transistor Q3 is turned on, and when a voltage is input to the source of the MOS transistor Q4, the gate of the MOS transistor Q4 drives the MOS transistor Q4 to be turned on due to the voltage division of the resistor R17, and the source of the MOS transistor Q4 outputs a voltage value to the second switching unit 332 to drive the second switching unit 332 to operate after being turned on.
Optionally, the second switch unit 332 includes a transistor Q35, a resistor R21, a resistor R23, and a capacitor C31; a base of the transistor Q35 is connected to a first end of the resistor R21 and a first end of the resistor R23, a second end of the resistor R21 is connected to a third end of the first switch unit 331 and a first end of the capacitor C31, a second end of the capacitor C31 and a second end of the resistor R23 are grounded, an emitter of the transistor Q35 is grounded, and a collector of the transistor Q35 is connected to the control unit 400 and a dc power supply. Specifically, when the first power switch 211 and the second power switch 212 are turned on, the base of the transistor Q35 is turned on after receiving the output voltage from the first switch unit 331, and the collector voltage thereof is pulled low, outputting a low level. When the first power switch 211 and the second power switch 212 are turned off, no voltage is input to the base of the transistor Q35, the transistor Q35 is turned off, and the voltage at the collector is the dc power voltage and is at a high level. By inputting the high and low levels to the control unit 400, feedback of the on or off states of the first power switch 211 and the second power switch 212 can be obtained.
As shown in fig. 6, a power supply device of the present application further includes a fifth driving unit 350; the input end of the fifth driving unit 350 is connected to the third end of the first switching unit 331, and the output end of the fifth driving unit 350 is connected to the second driving unit 320, for driving the second driving unit 320 to be in an off state. Specifically, the fifth driving unit 350 is connected to the output end of the first switch unit 331, and when the first power switch 211 and the second power switch 212 turn on the output end of the first switch unit 331 to output a voltage, the corresponding output driving level is transmitted to the second driving unit 320 to drive the second driving unit 320 to turn off, so as to ensure that the third power switch 221 and the fourth power switch 222 are in an off state, and reliably prevent the power supply circuit from flowing backwards.
In a specific embodiment, as shown in fig. 6 and 7, the fifth driving unit 350 includes a MOS transistor Q17, a resistor R112, a resistor R113, a capacitor C33, a diode D4, and a diode D7; the grid electrode of the MOS tube Q17 is connected with the third end of the first switch unit through a resistor R112, the grid electrode of the MOS tube Q17 is grounded through a parallel connection resistor R113 and a capacitor C33, the source electrode of the MOS tube Q17 is grounded, the drain electrode of the MOS tube Q17 is respectively connected with the cathodes of a diode D4 and a diode D7, and the anodes of the diode D4 and the diode D7 are respectively connected with the second drive unit. Specifically, the gate of the MOS transistor Q17 is connected to the first switch unit 331 through the resistor R112, when the first power switch 211 and the second power switch 212 are turned on and the output end of the first switch unit 331 has a voltage output, the MOS transistor Q17 is turned on, and the corresponding drain outputs a low level, that is, the cathode of the corresponding diode is a low level, which pulls down the level of the control end of the second driving unit 320 to turn off the second driving unit 320.
As shown in fig. 4, in another embodiment, the second driving unit 320 includes a third driving switch 321 connected to the third power switch 221 and a fourth driving switch 322 connected to the fourth power switch 222. Specifically, it can be understood that the third driving switch 321 corresponds to the third power switch 221, and the fourth power switch 222 corresponds to the fourth driving switch 322, that is, each power switch is driven by a group of driving switches.
In one embodiment, the third power switch 221 includes a plurality of third MOS transistors, a diode D18, a regulator tube Z2, a resistor R110, and a resistor R48; the sources of the plurality of third MOS transistors are connected with each other and then connected with the fourth power switch 222, the first end of the resistor R110 and the anode of the voltage regulator tube Z2, the drains of the plurality of third MOS transistors are connected with each other and then connected with the second power supply input end, the gates of the plurality of third MOS transistors are connected with each other and then connected with the anode of the diode D18, the second end of the resistor R110, the first end of the resistor R48 and the cathode of the voltage regulator tube Z2, and the cathode of the diode D18 and the second end of the resistor R48 are respectively connected with the third drive switch 321; each power switch may comprise a plurality of power switching tubes, which may be connected in parallel, which are driven together by a third drive switch 321.
In an embodiment, the fourth power switch 222 includes a plurality of fourth MOS transistors, a diode D31, a voltage regulator Z3, a resistor R12, and a resistor R117, sources of the plurality of fourth MOS transistors are connected to the third power switch after being connected to each other, an anode of the voltage regulator Z3 and a first end of the resistor R117, drains of the plurality of fourth MOS transistors are connected to the power output terminal after being connected to each other, gates of the plurality of fourth MOS transistors are connected to an anode of the diode D31, a cathode of the voltage regulator Z3, a second end of the resistor R117 and a first end of the resistor R12 after being connected to each other, and a cathode of the diode D31 and a second end of the resistor R12 are connected to the fourth driving switch 322; each power switch may comprise a plurality of power switching tubes, which may be connected in parallel, driven together by a fourth drive switch 322.
In one embodiment, the third driving switch 321 includes: the transistor Q14, the MOS tube Q15, the voltage regulator tube Z8, the resistor R38, the resistor R53 and the resistor R41; the base electrode of the triode Q14 is respectively connected with the first end of the resistor R41 and the control unit, the second end of the resistor R41 is grounded, the emitter electrode of the triode Q14 is grounded, the collector electrode of the triode Q14 is connected with the grid electrode of the MOS tube Q15 through the resistor R53, the drain electrode of the MOS tube Q15 is respectively connected with the driving power supply unit, the cathode of the voltage regulator tube Z8 and the first end of the resistor R38, the anode of the voltage regulator tube Z8 and the second end of the resistor R38 are connected with the grid electrode of the MOS tube Q15, and the source electrode of the MOS tube Q15 is connected with the third power switch 221; the transistor Q14 and the MOS transistor Q15 are turned on and off to output corresponding levels to the third power switch 221.
In one embodiment, the fourth driving switch 322 includes: the transistor Q20, the MOS tube Q24, the voltage regulator tube Z9, the resistor R63, the resistor R25 and the resistor R16; the base electrode of the triode Q20 is connected with the first end of the resistor R16 and the control unit respectively, the second end of the resistor R16 is grounded, the emitter electrode of the triode Q20 is grounded, the collector electrode of the triode Q20 is connected with the grid electrode of the MOS tube Q24 through the resistor R25, the drain electrode of the MOS tube Q24 is connected with the driving power supply unit, the cathode of the voltage regulator Z9 and the first end of the resistor R63 respectively, the anode of the voltage regulator Z9 and the second end of the resistor R63 are connected with the grid electrode of the MOS tube Q24, and the source electrode of the MOS tube Q24 is connected with the fourth power switch 222. The transistor Q20 and the MOS transistor Q24 are turned on and off to output corresponding levels to the third power switch 222.
As shown in fig. 5, in an embodiment, the fourth driving unit 340 includes a third switching unit 341 and a fourth switching unit 342; a first end of the third switching unit 341 is connected to the control unit 400, a second end of the third switching unit 341 is connected to the third power switch 221 and the fourth power switch 222, a third end of the third switching unit 341 is connected to a first end of the fourth switching unit 342, a second end of the fourth switching unit 342 is grounded, and a third end of the fourth switching unit 342 is connected to the control unit 400. Specifically, the fourth driving unit 340 is formed by connecting two stages of switch units, an input terminal of the third switch unit 341 is connected to the third power switch 221 and the fourth power switch 222, and a voltage is input when the third power switch 221 and the fourth power switch 222 are turned on, a control terminal of the third switch unit 341 is connected to the control unit 400, and is turned on or off by receiving a control level of the control unit 400, an output terminal of the third switch unit 341 has a voltage output to a control terminal of the fourth switch unit 342 when the third switch unit 341 is turned on, the fourth switch unit 342 is turned on when receiving the voltage output, and an output driving level corresponding to the output terminal thereof, that is, a corresponding sixth driving level. On the contrary, when the third power switch 221 and the fourth power switch 222 are turned off, the input terminal of the third switching unit 341 does not have a voltage input, the third switching unit 341 is turned off, and the output terminal thereof does not have a voltage output, at this time, the control terminal of the fourth switching unit 342 does not have a voltage input and maintains a turned-off state, and at this time, the output terminal thereof correspondingly outputs the fifth driving level.
In one specific implementation, the third switching unit 341 includes a transistor Q5, a MOS transistor Q5, a regulator tube Z14, a resistor R19, a resistor R22, and a resistor R27; the base electrode of the triode Q5 is connected with the control unit 400, the base electrode of the triode Q5 is grounded through a resistor R22, the emitter electrode of the triode Q5 is grounded, the collector electrode of the triode Q5 is respectively connected with the grid electrode of the MOS tube Q1, the anode of the voltage regulator tube Z11 and the first end of the resistor R19 through a resistor R27, the drain electrode of the MOS tube Q5 is respectively connected with the cathode of the voltage regulator tube Z11, the second end of the resistor R19, the third power switch 221 and the fourth power switch 222, and the drain electrode of the MOS tube Q5 is connected with the first end of the fourth switch unit 342; specifically, the transistor Q5 is turned on after receiving the control level of the control unit 400, when the transistor Q5 is turned on, when a voltage is input to the source of the MOS transistor Q1, the gate of the MOS transistor Q1 drives the MOS transistor Q1 to be turned on due to the divided voltage of the resistor R19, and the source of the MOS transistor Q1 outputs the voltage to the fourth switching unit 342 to drive the fourth switching unit 342 to operate.
In a specific embodiment, the fourth switching unit 342 includes a transistor Q37, a resistor R145, a resistor R47, and a capacitor C50; the base of the transistor Q37 is connected to the first end of the resistor R143 and the first end of the resistor R47, the second end of the resistor R143 is connected to the third end of the third switching unit 341 and the first end of the capacitor C50, the second end of the resistor R47 and the second end of the capacitor C50 are grounded, the emitter of the transistor Q37 is grounded, and the collector of the transistor Q37 is connected to the control unit 400 and a dc power supply. Specifically, when the third power switch 221 and the fourth power switch 222 are turned on, the base of the transistor Q37 is turned on after receiving the output voltage from the third switching unit 341, and the collector voltage thereof is pulled low to output a low level. When the third power switch 221 and the fourth power switch 222 are turned off, no voltage is input to the base of the transistor Q37, the transistor Q37 is turned off, and the voltage at the collector is the dc power voltage and is at a high level. By inputting the high and low levels to the control unit 400, feedback of the on or off state of the second power switch tube can be obtained.
As shown in fig. 6, a power supply device of the present application further includes a sixth driving unit 360; an input end of the sixth driving unit 360 is connected to the third end of the third switching unit 341, and an output end of the sixth driving unit 360 is connected to the first driving unit 310, for driving the first driving unit 310 to be in an off state. Specifically, the sixth driving unit 360 is connected to the output end of the third switching unit 341, and when the third power switch 221 and the fourth power switch 222 turn on the output end of the third switching unit 341 to output a voltage, the corresponding output driving level is sent to the first driving unit 310 to drive the first driving unit 310 to turn off, so as to ensure that the first power switch 211 and the second power switch 212 are in an off state, and reliably prevent the power supply circuit from flowing backwards.
In a specific embodiment, as shown in fig. 6 and 7, the sixth driving unit includes a MOS transistor Q21, a resistor R116, a resistor R118, a capacitor C34, a diode D5, and a diode D6; the gate of the MOS transistor Q21 is connected to the third terminal of the third switching unit through a resistor R116, the gate of the MOS transistor Q21 is further grounded through a resistor R118 and a capacitor C34 which are connected in parallel, the source of the MOS transistor Q21 is grounded, the drain of the MOS transistor Q21 is connected to the cathodes of the diode D5 and the diode D6, and the anodes of the diode D5 and the diode D6 are respectively connected to the first driving unit. Specifically, the gate of the MOS transistor Q21 is connected to the third switching unit 341 through the resistor R116, and when the third power switch 221 and the fourth power switch 222 are turned on and a voltage is output from the output end of the third switching unit 341, the MOS transistor Q21 is turned on, and the corresponding drain outputs a low level, that is, the cathode of the corresponding diode is a low level, which pulls down the level of the control terminal of the first driving unit 310 to turn off the first driving unit 310.
In addition, the invention also provides an electronic device which comprises the power supply device. The power supply device is connected with the battery pack and the working circuit to supply power to the working circuit.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (17)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110019442.0A CN112671072A (en) | 2021-01-07 | 2021-01-07 | Power supply device and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110019442.0A CN112671072A (en) | 2021-01-07 | 2021-01-07 | Power supply device and electronic equipment |
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| CN112671072A true CN112671072A (en) | 2021-04-16 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070273332A1 (en) * | 2006-03-31 | 2007-11-29 | Kazuhiko Funabashi | Lithium battery pack |
| CN211826946U (en) * | 2020-03-18 | 2020-10-30 | 深圳拓邦股份有限公司 | Power supply device, control device and electrical device |
| CN112737050A (en) * | 2021-01-07 | 2021-04-30 | 深圳拓邦股份有限公司 | Power supply device and electronic equipment |
| CN215897314U (en) * | 2021-01-07 | 2022-02-22 | 深圳拓邦股份有限公司 | Power supply device and electronic equipment |
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2021
- 2021-01-07 CN CN202110019442.0A patent/CN112671072A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070273332A1 (en) * | 2006-03-31 | 2007-11-29 | Kazuhiko Funabashi | Lithium battery pack |
| CN211826946U (en) * | 2020-03-18 | 2020-10-30 | 深圳拓邦股份有限公司 | Power supply device, control device and electrical device |
| CN112737050A (en) * | 2021-01-07 | 2021-04-30 | 深圳拓邦股份有限公司 | Power supply device and electronic equipment |
| CN215897314U (en) * | 2021-01-07 | 2022-02-22 | 深圳拓邦股份有限公司 | Power supply device and electronic equipment |
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