A power supply device and an electronic device

Abstract

The present invention relates to a power supply device and an electronic device, comprising: a first power supply input terminal, a second power supply input terminal, a power supply output terminal, and a driving power supply unit; as well as a control unit, an alarm unit connected to the control unit; a first driving unit and a second driving unit connected to the control unit and the driving power supply unit; 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, and a third driving unit connected to the series node of the first power switch and the second power switch; 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, and a fourth driving unit connected to the series node of the third power switch and the fourth power switch. Implementing the present invention can achieve alarm for the power supply circuit and improve the usage safety.

Description

Technical Field

[0001] The present invention relates to power supply technologies, and more particularly, to a power supply device and an electronic device. Background Art

[0002] For some electronic devices, such as a lawn mower powered by 36V, since its usage scenario is outdoor, its power supply needs to use a battery. To increase its cruising time, usually two battery packs are used to supply power to it, and when one battery pack runs out of power, it switches to the other battery pack for power supply. In the battery pack power supply, usually the power supply circuit of the battery pack is switched by switching a power tube. Once the power tube has a problem, it cannot be quickly identified. Continuing to use will pose a risk. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a power supply device and an electronic device for the above-mentioned partial technical defects of the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problems is to construct a power supply device, including: a first power supply input terminal connectable to a first battery pack, a second power supply input terminal connectable to a second battery pack, a power supply output terminal for providing a power supply output, and a drive power supply unit for outputting a drive power supply voltage; and

[0005] a control unit configured to be in a first state, a second state, or a third state, wherein when the control unit is in the first state, it outputs a first control level, when it is in the second state, it outputs a second control level, and when it is in the third state, neither the first control level nor the second control level is output;

[0006] an alarm unit connected to the control unit and configured to act upon receiving the alarm drive level of the control unit;

[0007] a first drive unit connected to the control unit and the drive power supply unit and configured to output a first drive level upon receiving the first control level;

[0008] a second drive unit connected to the control unit and the drive power supply unit and configured to output a second drive level upon receiving the second control level;

[0009] 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 both the first power switch and the second power switch are connected to the first drive unit and conduct respectively upon receiving the first drive level;

[0010] A third driving unit that connects the 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;

[0011] 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 both connected to the second driving unit to receive the second driving level and are turned on respectively;

[0012] A fourth driving unit that connects the 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;

[0013] The control unit is connected to the third driving unit and the fourth driving unit, and is configured to output the alarm driving level when in the third state and receiving the third driving level or the fourth driving level, output the alarm driving level when in the second state and receiving the third driving level, or output the alarm driving level when in the first state and receiving the fourth driving level.

[0014] Preferably, a power supply device of the present invention further includes a voltage detection unit connected to the power supply output terminal for generating a detection level when there is a voltage output at the power supply output terminal;

[0015] The control unit is connected to the voltage detection unit and is configured to output the alarm driving level when in the third state and receiving the detection level; or

[0016] Output the alarm driving level when there is no detection level in the first state or the second state.

[0017] Preferably, the voltage detection unit includes a resistor R115 and a resistor R125; the resistor R115 and the resistor R125 are connected in series, one end is connected to the power supply output terminal, the other end is grounded, and the series node of the resistor R115 and the resistor R125 is connected to the control unit.

[0018] 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.

[0019] Preferably, the first power switch includes a plurality of first MOS transistors, diode D19, zener diode Z1, resistor R80, and resistor R43; the sources of the plurality of first MOS transistors are connected to each other and then connected to the second power switch, the first end of resistor R80, and the anode of zener diode Z1, the drains of the plurality of first MOS transistors are connected to each other and then connected to the first power supply input terminal, the gates of the plurality of first MOS transistors are connected to each other and then connected to the anode of diode D19, the second end of resistor R80, the first end of resistor R43, and the cathode of zener diode Z1, and the cathode of diode D19 and the second end of resistor R43 are respectively connected to the first drive switch; and / or

[0020] The second power switch includes a plurality of second MOS transistors, diode D21, zener diode Z4, resistor R82, and resistor R60. The sources of the plurality of second MOS transistors are connected to each other and then connected to the first power switch, the anode of zener diode Z4, and the first end of resistor R82. The drains of the plurality of second MOS transistors are connected to each other and then connected to the power output terminal. The gates of the plurality of second MOS transistors are connected to each other and then connected to the anode of diode D21, the cathode of zener diode Z4, the second end of resistor R82, and the first end of resistor R60. The cathode of diode D21 and the second end of resistor R60 are connected to the second drive switch; and / or

[0021] The first drive switch includes: triode Q18, MOS transistor Q19, zener diode Z5, resistor R39, resistor R56, and resistor R49; the base of triode Q18 is respectively connected to the first end of resistor R49 and the control unit, the second end of resistor R49 is grounded, the emitter of triode Q18 is grounded, the collector of triode Q18 is connected to the gate of MOS transistor Q19 through resistor R56, the drain of MOS transistor Q19 is respectively connected to the drive power supply unit, the cathode of zener diode Z5, and the first end of resistor R39, the anode of zener diode Z5 and the second end of resistor R39 are connected and then connected to the gate of MOS transistor Q19, and the source of MOS transistor Q19 is connected to the first power switch; and / or

[0022] The second driving switch includes: a triode Q22, a MOS transistor Q23, a zener diode Z6, a resistor R61, a resistor R20, and a resistor R65; the base of the triode Q22 is respectively connected to the first end of the resistor R65 and the control unit, the second end of the resistor R65 is grounded, the emitter of the triode Q22 is grounded, the collector of the triode Q22 is connected to the gate of the MOS transistor Q23 via the resistor R20, the drain of the MOS transistor Q23 is respectively connected to the driving power supply unit, the cathode of the zener diode Z6, and the first end of the resistor R61, the anode of the zener diode Z6 and the second end of the resistor R61 are connected and then connected to the gate of the MOS transistor Q23, and the source of the MOS transistor Q23 is connected to the second power switch.

[0023] Preferably, the third driving unit includes a first switching unit and a second switching unit; the first end of the first switching unit is connected to the control unit, the second end of the first switching unit is connected to the series connection node of the first power switch and the second power switch, the third end of the first switching unit is connected to the first end of the second switching unit, the second end of the second switching unit is grounded, and the third end of the second switching unit is connected to the control unit.

[0024] Preferably, the first switching unit includes a triode Q3, a MOS transistor Q4, a zener diode Z10, a resistor R1, a resistor R13, and a resistor R17; the base of the triode Q3 is connected to the control unit, the base of the triode Q3 is grounded via the resistor R13, the emitter of the triode Q3 is grounded, the collector of the triode Q3 is respectively connected to the gate of the MOS transistor Q4, the anode of the zener diode Z10, and the first end of the resistor R1 via the resistor R17, the drain of the MOS transistor Q4 is respectively connected to the cathode of the zener diode Z10, the second end of the resistor R1, and the series connection node of the first power switch and the second power switch, and the source of the MOS transistor Q4 is connected to the first end of the second switching unit; and / or

[0025] The second switching unit includes a triode Q35, a resistor R21, a resistor R23, and a capacitor C31; the base of the triode Q35 is connected to the first end of the resistor R21 and the first end of the resistor R23, the second end of the resistor R21 is respectively connected to the third end of the first switching unit and the first end of the capacitor C31, the second end of the capacitor C31 and the second end of the resistor R23 are respectively grounded, the emitter of the triode Q35 is grounded, and the collector of the triode Q35 is respectively connected to the control unit and a DC power supply.

[0026] Preferably, a power supply device of the present invention further includes a fifth driving unit; an input end of the fifth driving unit is connected to a third end of the first switching unit, and an output end of the fifth driving unit is connected to the second driving unit.

[0027] Preferably, the fifth driving unit includes an MOS transistor Q17, a resistor R112, a resistor R113, a capacitor C33, a diode D4, and a diode D7;

[0028] The gate of the MOS transistor Q17 is connected to the third end of the first switching unit via the resistor R112, the gate of the MOS transistor Q17 is also grounded via the parallel connection of the resistor R113 and the capacitor C33, the source of the MOS transistor Q17 is grounded, the drain of the MOS transistor Q17 is respectively connected to the cathodes of the diode D4 and the diode D7, and the anodes of the diode D4 and the diode D7 are respectively connected to the second driving unit.

[0029] 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.

[0030] Preferably, the third power switch includes a plurality of third MOS transistors, a diode D18, a voltage stabilizing diode Z2, a resistor R110, and a resistor R48; the sources of the plurality of third MOS transistors are connected to each other and then connected to the fourth power switch, the first end of the resistor R110, and the anode of the voltage stabilizing diode Z2, the drains of the plurality of third MOS transistors are connected to each other and then connected to the second power supply input end, the gates of the plurality of third MOS transistors are connected to each other and then connected to 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 stabilizing diode Z2, and the cathode of the diode D18 and the second end of the resistor R48 are respectively connected to the third driving switch; and / or

[0031] The fourth power switch includes a plurality of fourth MOS transistors, a diode D31, a voltage stabilizing diode Z3, a resistor R12, and a resistor R117. The sources of the plurality of fourth MOS transistors are connected to each other and then connected to the third power switch, the anode of the voltage stabilizing diode Z3, and the first end of the resistor R117. The drains of the plurality of fourth MOS transistors are connected to each other and then connected to the power output end. The gates of the plurality of fourth MOS transistors are connected to each other and then connected to the anode of the diode D21, the cathode of the voltage stabilizing diode Z4, the second end of the resistor R117, and the first end of the resistor R12. The cathode of the diode D31 and the second end of the resistor R12 are connected to the fourth driving switch; and / or

[0032] The third driving switch includes: triode Q14, MOS transistor Q15, voltage stabilizing diode Z8, resistor R38, resistor R53 and resistor R41; the base of the triode Q14 is respectively connected to the first end of the resistor R41 and the control unit, the second end of the resistor R41 is grounded, the emitter of the triode Q14 is grounded, the collector of the triode Q14 is connected to the gate of the MOS transistor Q15 through the resistor R53, the drain of the MOS transistor Q15 is respectively connected to the driving power supply unit, the cathode of the voltage stabilizing diode Z8 and the first end of the resistor R38, the anode of the voltage stabilizing diode Z8 and the second end of the resistor R38 are connected and then connected to the gate of the MOS transistor Q15, and the source of the MOS transistor Q15 is connected to the third power switch; and / or

[0033] The fourth driving switch includes: triode Q20, MOS transistor Q24, voltage stabilizing diode Z9, resistor R63, resistor R25 and resistor R16; the base of the triode Q20 is respectively connected to the first end of the resistor R16 and the control unit, the second end of the resistor R16 is grounded, the emitter of the triode Q20 is grounded, the collector of the triode Q20 is connected to the gate of the MOS transistor Q24 through the resistor R25, the drain of the MOS transistor Q24 is respectively connected to the driving power supply unit, the cathode of the voltage stabilizing diode Z9 and the first end of the resistor R63, the anode of the voltage stabilizing diode Z9 and the second end of the resistor R63 are connected and then connected to the gate of the MOS transistor Q24, and the source of the MOS transistor Q24 is connected to the fourth power switch.

[0034] Preferably, the fourth driving unit includes a third switching unit and a fourth switching unit; the first end of the third switching unit is connected to the control unit, the second end of the third switching unit is connected to the series node of the third power switch and the fourth power switch, the third end of the third switching unit is connected to the first end of the fourth switching unit, the second end of the fourth switching unit is grounded, and the third end of the fourth switching unit is connected to the control unit.

[0035] Preferably, the third switching unit includes a triode Q5, a MOS transistor Q5, a voltage stabilizing diode Z14, a resistor R19, a resistor R22, and a resistor R27; the base of the triode Q5 is connected to the control unit, the base of the triode Q5 is grounded through the resistor R22, the emitter of the triode Q5 is grounded, and the collector of the triode Q5 is respectively connected to the gate of the MOS transistor Q1, the anode of the voltage stabilizing diode Z11, and the first end of the resistor R19 through the resistor R27. The drain of the MOS transistor Q5 is respectively connected to the cathode of the voltage stabilizing diode Z11, the second end of the resistor R19, and the series connection node of the third power switch and the fourth power switch, and the source of the MOS transistor Q5 is connected to the first end of the fourth switching unit; and / or

[0036] The fourth switching unit includes a triode Q37, a resistor R145, a resistor R47, and a capacitor C50;

[0037] The base of the triode Q37 is respectively 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 respectively connected to the third end of the third switching unit and the first end of the capacitor C50. The second ends of the resistor R47 and the capacitor C50 are respectively grounded. The emitter of the triode Q37 is grounded, and the collector of the triode Q37 is connected to the control unit and a DC power supply.

[0038] Preferably, a power supply device of the present invention further includes a sixth driving unit;

[0039] The input end of the sixth driving unit is connected to the third end of the third switching unit, and the output end of the sixth driving unit is connected to the first driving unit.

[0040] Preferably, 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;

[0041] The gate of the MOS transistor Q21 is connected to the third end of the third switching unit through the resistor R116. The gate of the MOS transistor Q21 is also grounded through the parallel-connected resistor R118 and capacitor C34. 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.

[0042] Preferably, the warning unit includes a plurality of light-emitting diodes;

[0043] The anode of the light-emitting diode is connected to a power supply, and the cathode of the light-emitting diode is connected to the control unit.

[0044] The present invention also constructs an electronic device, including the power supply device described in any one of the above.

[0045] Implementing a power supply device and an electronic device of the present invention has the following beneficial effects: It can achieve power supply circuit warning and improve the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0047] Figure 1 is a logic block diagram of an embodiment of a power supply device of the present invention;

[0048] Figure 2 is a logic block diagram of another embodiment of a power supply device of the present invention;

[0049] Figure 3 is a partial circuit schematic diagram of an embodiment of a power supply device of the present invention;

[0050] Figure 4 is a partial circuit schematic diagram of another embodiment of a power supply device of the present invention;

[0051] Figure 5 is a partial circuit schematic diagram of another embodiment of a power supply device of the present invention;

[0052] Figure 6 is a partial circuit schematic diagram of another embodiment of a power supply device of the present invention;

[0053] Figure 7 is a partial circuit schematic diagram of another embodiment of a power supply device of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] In order to have a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the drawings.

[0055] As Figure 1As shown, in a first embodiment of a power supply device according to the present invention, it includes: a first power supply input terminal 110 that can be connected to a first battery pack, a second power supply input terminal 120 that can be connected to a second battery pack, a power supply output terminal 600 for providing a power output, and a drive power supply unit 500 for outputting a drive power supply voltage; and a control unit 400 configured to be in a first state, a second state, or a third state, wherein when the control unit 400 is in the first state, it outputs a first control level, when in the second state, it outputs a second control level, and when in the third state, no first control level or second control level is output; an alarm unit 700 connected to the control unit 400 for receiving an alarm drive level of the control unit 400 to act; a first drive unit 310 connected to the control unit 400 and the drive power supply unit 500 for outputting a first drive level when receiving the first control level; a second drive unit 320 connected to the control unit 400 and the drive power supply unit 500 for outputting a second drive 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 supply input terminal 110 and the power supply output terminal 600, wherein both the first power switch 211 and the second power switch 212 are connected to the first drive unit 310 to receive the first drive level and conduct respectively; a third drive unit 330 connected to the series node of the first power switch 211 and the second power switch 212 and outputting a third drive level when the first power switch 211 or the second power switch 212 conducts; a third power switch 221 and a fourth power switch 222 connected in series between the second power supply input terminal 210 and the power supply output terminal 600, wherein both the third power switch 221 and the fourth power switch 222 are connected to the second drive unit 320 to receive the second drive level and conduct respectively; a fourth drive unit 340 connected to the series node of the third power switch 221 and the fourth power switch 222 and outputting a fourth drive level when the third power switch 221 or the fourth power switch 223 conducts; the control unit 400 is connected to the third drive unit 330 and the fourth drive unit 340 and is configured to output an alarm drive level when in the third state and receiving the third drive level or the fourth drive level, output an alarm drive level when in the second state and receiving the third drive level, or output an alarm drive level when in the first state and receiving the fourth drive level. Specifically, different battery packs can be connected through the first power supply input terminal 110 and the second power supply input terminal 120 respectively. The first power supply input terminal 110 is connected to the first battery pack and is connected to the power supply output terminal 600 through the series-connected first power switch 211 and second power switch 212, and it provides a power output for the power supply output terminal 600 when the first power switch 211 and the second power switch 212 conduct.The second power supply input terminal 120 is connected to the second battery pack and is connected to the power supply output terminal 600 through the third power switch 221 and the fourth power switch 222, and provides power output for the power supply output terminal 600 when the third power switch 221 and the fourth power switch 222 are turned on. The control unit 400 is configured in different states, and it can output a first control level or a second control level, or it can have neither the first control level nor the second control level. It can be understood that the control level can be selected to output the first control level or the second control level according to the states of the first battery pack and the second battery pack. At the same time, the control unit 400 can output an alarm drive level to drive the alarm unit 700 to act as an alarm. The first driving unit 310 is connected to the control unit 400, the first power switch 211 and the second power switch 212, and generates a driving level to drive the first power switch 211 and the second power switch 212 to turn on when the control unit 400 outputs the first control level. The second driving unit 320 is connected to the control unit 400, the third power switch 221 and the fourth power switch 222, and generates a driving level to drive the third power switch 221 and the fourth power switch 222 to turn on when the control unit 400 outputs the second control level. Both the first driving unit 310 and the second driving unit 320 are powered 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 the 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, it outputs the corresponding 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 the 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, it outputs the corresponding fourth driving level. The control unit 400 is connected to the third driving unit 330 and the fourth driving unit 340, receives the corresponding driving levels of the third driving unit 330 and the fourth driving unit 340, and obtains the corresponding judgment results for 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 level it outputs, that is, whether to output the first control level or the second control level. Under normal circumstances, 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 the off state to prevent reverse current. If the fourth driving unit 340 outputs the fourth driving level at this time, it is considered that the third power switch 221 and the fourth power switch 222 are abnormal, and the control unit 400 outputs an alarm drive level to the alarm 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 the off state to prevent reverse current.If the third driving unit 330 outputs a third driving level, it is considered that the first power switch 211 and the second power switch 212 are abnormal, and the control unit 400 outputs an alarm driving level to the alarm unit 700. That is, the monitoring and alarming of abnormalities in the circuit can be realized. If the control unit 400 is in the third state, at this time, the first power switch 211, the second power switch 212, the third power switch 221, and the fourth power switch 222 should all be in the off state. If the third driving level or the fourth driving level is received at this time, it is considered 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.

[0056] As Figure 2 shown, in an embodiment, the power supply device of the present invention further includes a voltage detection unit 600 connected to the power supply output terminal 600 for generating a detection level when there is a voltage output at the power supply output terminal 600; the control unit 400 is connected to the voltage detection unit 600 and is configured to output an alarm driving level when in the third state and receiving the detection level; or output an alarm driving level when in the first state or the second state and there is no detection level. Specifically, under normal circumstances, when the control unit 400 is in the third state, that is, when neither the first control level nor the second control level is 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 under normal conditions. At this time, the output level signal of the power supply output terminal 600 should be zero. If the voltage output detected by the voltage detection unit 800 is received at this time, it is considered that a short circuit has occurred in one of the first power switch 211, the second power switch 212, the third power switch 221, and the fourth power switch 222, and the link is abnormal, and an alarm is generated. When the control unit 400 is in the first state or the second state, under normal circumstances, the output level signal of the power supply output terminal 600 should have an output voltage at this time. If the voltage detection unit 800 detects no voltage output at this time, it is considered that the first power switch 211, the second power switch 212, the third power switch 221, and the fourth power switch 222 corresponding to it are abnormal, and an alarm is generated.

[0057] As Figure 4 shown, the voltage detection unit 800 includes a resistor R115 and a resistor R125; the resistor R115 and the resistor R125 are connected in series, one end is connected to the power supply output terminal 600, and the other end is grounded. The series connection node of the resistor R115 and the resistor R125 is connected to the control unit 400. Specifically, the voltage division obtained by the series voltage division of the resistor R115 and the resistor R125 is input to the control unit 400.

[0058] As Figure 3As shown, the alarm unit 700 includes a plurality of light-emitting diodes; the anodes of the light-emitting diodes are connected to a power supply, and the cathodes of the light-emitting diodes are connected to the control unit 400. Specifically, the alarm unit 700 includes a light-emitting diode LED1 and a light-emitting diode LED2. Both the light-emitting diode LED1 and the light-emitting diode LED2 are dual light-emitting diodes. Their anodes are both connected to a 3.3V power supply, and their cathodes 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 drive level through PF pins and PA pins to drive the light-emitting diodes to perform a conversion of the light-emitting color for alarm indication.

[0059] As Figure 4 shown, 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.

[0060] In an embodiment, the first power switch 211 includes a plurality of first MOS transistors, a diode D19, a voltage stabilizing diode Z1, a resistor R80, and a resistor R43; the sources of the plurality of first MOS transistors are connected to each other and then connected to the second power switch 212, the first end of the resistor R80, and the anode of the voltage stabilizing diode Z1. The drains of the plurality of first MOS transistors are connected to each other and then connected to the first power supply input terminal 110. The gates of the plurality of first MOS transistors are connected to each other and then connected to 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 stabilizing diode Z1. The cathode of the diode D19 and the second end of the resistor R43 are respectively connected to the first driving switch 311. Specifically, each power switch may include a plurality of power switch transistors, and the plurality of power switch transistors may be connected in parallel and are driven together through the first driving switch 311.

[0061] In an embodiment, the second power switch 212 includes a plurality of second MOS transistors, a diode D21, a voltage stabilizing diode Z4, a resistor R82, and a resistor R60. The sources of the plurality of second MOS transistors are connected to each other and then connected to the first power switch 211, the anode of the voltage stabilizing diode Z4, and the first end of the resistor R82. The drains of the plurality of second MOS transistors are connected to each other and then connected to the power supply output terminal 600. The gates of the plurality of second MOS transistors are connected to each other and then connected to the anode of the diode D21, the cathode of the voltage stabilizing diode Z4, the second end of the resistor R82, and the first end of the resistor R60. The cathode of the diode D21 and the second end of the resistor R60 are connected to the second driving switch 312. Specifically, each power switch may include a plurality of power switch transistors, and the plurality of power switch transistors may be connected in parallel and are driven together through the second driving switch 312.

[0062] In one embodiment, the first drive switch 311 includes: a triode Q18, a MOS transistor Q19, a zener diode Z5, a resistor R39, a resistor R56, and a resistor R49; the base of the triode Q18 is respectively connected to the first end of the resistor R49 and the control unit, the second end of the resistor R49 is grounded, the emitter of the triode Q18 is grounded, the collector of the triode Q18 is connected to the gate of the MOS transistor Q19 via the resistor R56, the drain of the MOS transistor Q19 is respectively connected to the drive power supply unit, the cathode of the zener diode Z5, and the first end of the resistor R39, the anode of the zener diode Z5 and the second end of the resistor R39 are connected and then connected to the gate of the MOS transistor Q19, and the source of the MOS transistor Q19 is connected to the first power switch 211; wherein the conduction and cutoff of the triode Q18 and the MOS transistor Q19 output corresponding levels to the first power switch 211.

[0063] In one embodiment, the second drive switch 312 includes: a triode Q22, a MOS transistor Q23, a zener diode Z6, a resistor R61, a resistor R20, and a resistor R65; the base of the triode Q22 is respectively connected to the first end of the resistor R65 and the control unit, the second end of the resistor R65 is grounded, the emitter of the triode Q22 is grounded, the collector of the triode Q22 is connected to the gate of the MOS transistor Q23 via the resistor R20, the drain of the MOS transistor Q23 is respectively connected to the drive power supply unit, the cathode of the zener diode Z6, and the first end of the resistor R61, the anode of the zener diode Z6 and the second end of the resistor R61 are connected and then connected to the gate of the MOS transistor Q23, and the source of the MOS transistor Q23 is connected to the second power switch 212. Wherein the conduction and cutoff of the triode Q22 and the MOS transistor Q23 output corresponding levels to the second power switch 212.

[0064] As Figure 5As shown, in one embodiment, the third driving unit 330 includes a first switching unit 331 and a second switching unit 332; a first end of the first switching unit 331 is connected to the control unit 400, a second end of the first switching 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 switching unit 331 is connected to a first end of the second switching unit 332, a second end of the second switching unit 332 is grounded, and a third end of the second switching unit 332 is connected to the control unit 400. Specifically, the third driving unit 330 is composed of two-stage switching units connected. An input end of the first switching unit 331 is connected to the first power switch 211 and the second power switch 212. When the first power switch 211 and the second power switch 212 are turned on, there is a voltage input. A control end of the first switching unit 331 is connected to the control unit 400, and it receives a control level from the control unit 400 to turn on or off. When the first switching unit 331 is turned on, its output end outputs a voltage to a control end of the second switching unit 332. The second switching unit 332 is turned on when receiving this voltage output, and outputs a corresponding driving level at its output end, 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, there is no voltage input at the input end of the first switching unit 331, the first switching unit 331 is turned off, and there is no voltage output at its output end. At this time, there is no voltage input at the control end of the second switching unit 332 to keep it in the off state, and a corresponding third driving level is output at its output end at this time.

[0065] In a specific embodiment, the first switching unit 331 includes a triode Q3, a MOS transistor Q4, a voltage stabilizing diode Z10, a resistor R1, a resistor R13, and a resistor R17; a base of the triode Q3 is connected to the control unit 400, the base of the triode Q3 is grounded through the resistor R13, an emitter of the triode Q3 is grounded, a collector of the triode Q3 is respectively connected to a gate of the MOS transistor Q4, an anode of the voltage stabilizing diode Z10, and a first end of the resistor R1 through the resistor R17. A drain of the MOS transistor Q4 is respectively connected to a cathode of the voltage stabilizing diode Z10, a second end of the resistor R1, and a series node of the first power switch 211 and the second power switch 212. A source of the MOS transistor Q4 is connected to a first end of the second switching unit 332. Specifically, the triode Q3 is turned on after receiving the control level from the control unit 400. When the triode Q3 is turned on, when there is a voltage input at the source of the MOS transistor Q4, the gate of the MOS transistor Q4 is driven to turn on due to the voltage division of the resistor R17. After the MOS transistor Q4 is turned on, its source outputs a voltage value to the second switching unit 332 to drive the second switching unit 332 to act.

[0066] Optionally, the second switch unit 332 includes a triode Q35, a resistor R21, a resistor R23, and a capacitor C31; the base of the triode Q35 is connected to the first ends of the resistor R21 and the resistor R23, the second end of the resistor R21 is respectively connected to the third end of the first switch unit 331 and the first end of the capacitor C31, the second ends of the capacitor C31 and the resistor R23 are respectively grounded, the emitter of the triode Q35 is grounded, and the collector of the triode Q35 is respectively 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 triode Q35 receives the output voltage from the first switch unit 331 and then turns on, and the voltage of its collector is pulled down to output a low level. When the first power switch 211 and the second power switch 212 are turned off, there is no voltage input to the base of the triode Q35, and the triode Q35 is in a cut-off state, and the voltage of its collector is the DC power supply voltage, which is a high level. By inputting this high and low level to the control unit 400, the feedback of the on or off state of the first power switch 211 and the second power switch 212 can be obtained.

[0067] As Figure 6 shown, 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 switch 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. When the first power switch 211 and the second power switch 212 are turned on and there is a voltage output at the output end of the first switch unit 331, it correspondingly outputs a driving level to the second driving unit 320 to drive the second driving unit 320 to be 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 backflow of the power supply circuit.

[0068] In a specific embodiment, as Figure 6 and Figure 7As shown, the fifth driving unit 350 includes an 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 switching unit via the resistor R112, the gate of the MOS transistor Q17 is also grounded via the parallel connection of the resistor R113 and the capacitor C33, the source of the MOS transistor Q17 is grounded, the drain of the MOS transistor Q17 is respectively connected to the cathodes of the diode D4 and the diode D7, and the anodes of the diode D4 and the diode D7 are respectively connected to the second driving unit. Specifically, the gate of the MOS transistor Q17 is connected to the first switching unit 331 via the resistor R112. When the first power switch 211 and the second power switch 212 are turned on and there is a voltage output at the output terminal of the first switching unit 331, the MOS transistor Q17 is turned on, and its corresponding drain outputs a low level, that is, the cathode of the corresponding diode is at a low level, which pulls down the level of the control terminal of the second driving unit 320, causing the second driving unit 320 to be in an off state.

[0069] As Figure 4 shown, 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.

[0070] In one embodiment, the third power switch 221 includes a plurality of third MOS transistors, a diode D18, a zener diode Z2, a resistor R110, and a resistor R48; the sources of the plurality of third MOS transistors are connected to each other and then connected to the fourth power switch 222, the first end of the resistor R110, and the anode of the zener diode Z2, the drains of the plurality of third MOS transistors are connected to each other and then connected to the second power supply input terminal, the gates of the plurality of third MOS transistors are connected to each other and then connected to 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 zener diode Z2, and the cathode of the diode D18 and the second end of the resistor R48 are respectively connected to the third driving switch 321; each power switch may include a plurality of power switch transistors, and the plurality of power switch transistors may be connected in parallel and are driven together by the third driving switch 321.

[0071] In one embodiment, the fourth power switch 222 includes a plurality of fourth MOS transistors, a diode D31, a zener diode Z3, a resistor R12, and a resistor R117. The sources of the plurality of fourth MOS transistors are connected to each other and then connected to the third power switch, the anode of the zener diode Z3, and the first end of the resistor R117. The drains of the plurality of fourth MOS transistors are connected to each other and then connected to the power output terminal. The gates of the plurality of fourth MOS transistors are connected to each other and then connected to the anode of the diode D31, the cathode of the zener diode Z3, the second end of the resistor R117, and the first end of the resistor R12. The cathode of the diode D31 and the second end of the resistor R12 are connected to the fourth drive switch 322. Each power switch may include a plurality of power switch transistors, and the plurality of power switch transistors may be connected in parallel and are driven together through the fourth drive switch 322.

[0072] In one embodiment, the third drive switch 321 includes: a triode Q14, a MOS transistor Q15, a zener diode Z8, a resistor R38, a resistor R53, and a resistor R41. The base of the triode Q14 is respectively connected to the first end of the resistor R41 and the control unit. The second end of the resistor R41 is grounded. The emitter of the triode Q14 is grounded. The collector of the triode Q14 is connected to the gate of the MOS transistor Q15 through the resistor R53. The drain of the MOS transistor Q15 is respectively connected to the drive power supply unit, the cathode of the zener diode Z8, and the first end of the resistor R38. The anode of the zener diode Z8 and the second end of the resistor R38 are connected and then connected to the gate of the MOS transistor Q15. The source of the MOS transistor Q15 is connected to the third power switch 221. The conduction and cutoff of the triode Q14 and the MOS transistor Q15 output corresponding levels to the third power switch 221.

[0073] In one embodiment, the fourth drive switch 322 includes: a triode Q20, a MOS transistor Q24, a zener diode Z9, a resistor R63, a resistor R25, and a resistor R16. The base of the triode Q20 is respectively connected to the first end of the resistor R16 and the control unit. The second end of the resistor R16 is grounded. The emitter of the triode Q20 is grounded. The collector of the triode Q20 is connected to the gate of the MOS transistor Q24 through the resistor R25. The drain of the MOS transistor Q24 is respectively connected to the drive power supply unit, the cathode of the zener diode Z9, and the first end of the resistor R63. The anode of the zener diode Z9 and the second end of the resistor R63 are connected and then connected to the gate of the MOS transistor Q24. The source of the MOS transistor Q24 is connected to the fourth power switch 222. The conduction and cutoff of the triode Q20 and the MOS transistor Q24 output corresponding levels to the third power switch 222.

[0074] As Figure 5As shown, in one embodiment, the fourth driving unit 340 includes a third switching unit 341 and a fourth switching unit 342; the first end of the third switching unit 341 is connected to the control unit 400, the second end of the third switching unit 341 is connected to the third power switch 221 and the fourth power switch 222, the third end of the third switching unit 341 is connected to the first end of the fourth switching unit 342, the second end of the fourth switching unit 342 is grounded, and the third end of the fourth switching unit 342 is connected to the control unit 400. Specifically, the fourth driving unit 340 is composed of two-level switching units connected. The input end of the third switching unit 341 is connected to the third power switch 221 and the fourth power switch 222. When the third power switch 221 and the fourth power switch 222 are turned on, there is a voltage input. The control end of the third switching unit 341 is connected to the control unit 400, and it receives the control level of the control unit 400 to turn on or off. When the third switching unit 341 is turned on, its output end has a voltage output to the control end of the fourth switching unit 342. When the fourth switching unit 342 receives this voltage output, it is turned on, and the corresponding output driving level, that is, the corresponding sixth driving level, is output at its output end. On the contrary, when the third power switch 221 and the fourth power switch 222 are turned off, there is no voltage input at the input end of the third switching unit 341, the third switching unit 341 is turned off, and there is no voltage output at its output end. At this time, there is no voltage input at the control end of the fourth switching unit 342 to keep it in the off state, and the corresponding fifth driving level is output at its output end.

[0075] In a specific implementation, the third switching unit 341 includes a triode Q5, a MOS tube Q5, a zener diode Z14, a resistor R19, a resistor R22, and a resistor R27; the base of the triode Q5 is connected to the control unit 400, the base of the triode Q5 is grounded through the resistor R22, the emitter of the triode Q5 is grounded, and the collector of the triode Q5 is respectively connected to the gate of the MOS tube Q1, the anode of the zener diode Z11, and the first end of the resistor R19 through the resistor R27. The drain of the MOS tube Q5 is respectively connected to the cathode of the zener diode Z11, the second end of the resistor R19, the third power switch 221, and the fourth power switch 222. The drain of the MOS tube Q5 is connected to the first end of the fourth switching unit 342; specifically, the triode Q5 is turned on after receiving the control level of the control unit 400. When the triode Q5 is turned on, when there is a voltage input at the source of the MOS tube Q1, the gate of the MOS tube Q1 is driven to turn on due to the voltage division of the resistor R19. After the MOS tube Q1 is turned on, its source outputs a voltage to the fourth switching unit 342 to drive the fourth switching unit 342 to act.

[0076] In a specific embodiment, the fourth switch unit 342 includes a triode Q37, a resistor R145, a resistor R47, and a capacitor C50; the base of the triode Q37 is respectively 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 respectively connected to the third end of the third switch unit 341 and the first end of the capacitor C50, the second ends of the resistor R47 and the capacitor C50 are respectively grounded, the emitter of the triode Q37 is grounded, and the collector of the triode 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, after the base of the triode Q37 receives the output voltage from the third switch unit 341, it is turned on, and the voltage of its collector is pulled down to output a low level. When the third power switch 221 and the fourth power switch 222 are turned off, there is no voltage input to the base of the triode Q37, and the triode Q37 is in a cut-off state, and the voltage of its collector is the DC power supply voltage, which is a high level. By inputting this high and low level to the control unit 400, the feedback of the on or off state of the second power switch tube can be obtained.

[0077] As Figure 6 shown, a power supply device of the present application further includes a sixth driving unit 360; the input end of the sixth driving unit 360 is connected to the third end of the third switch unit 341, and the 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 switch unit 341. When there is a voltage output at the output end of the third switch unit 341 when the third power switch 221 and the fourth power switch 222 are turned on, it outputs a corresponding driving level 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 backflow of the power supply circuit.

[0078] In a specific embodiment, as Figure 6 and Figure 7As shown, the sixth driving unit includes MOS transistor Q21, resistor R116, resistor R118, capacitor C34, diode D5 and diode D6; the gate of MOS transistor Q21 is connected to the third terminal of the third switching unit via resistor R116, the gate of MOS transistor Q21 is also grounded via the parallel-connected resistor R118 and capacitor C34, the source of MOS transistor Q21 is grounded, the drain of MOS transistor Q21 is connected to the cathodes of diode D5 and diode D6, and the anodes of diode D5 and diode D6 are respectively connected to the first driving unit. Specifically, the gate of MOS transistor Q21 is connected to the third switching unit 341 via resistor R116. When the third power switch 221 and the fourth power switch 222 are turned on and there is a voltage output at the output terminal of the third switching unit 341, MOS transistor Q21 is turned on, and its corresponding drain outputs a low level, that is, the cathode of the corresponding diode is at a low level, which pulls down the level of the control terminal of the first driving unit 310, causing the first driving unit 310 to be in an off state.

[0079] In addition, the present invention also constructs an electronic device, including the power supply device as described in any one of the above. It is connected to the battery pack and the working circuit through this power supply device to realize the power supply to the working circuit.

[0080] It can be understood that the above embodiments only represent the preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention should fall within the scope covered by the claims of the present invention.

Claims

1. A power supply device, characterized in that, Comprising: A first power supply input terminal connectable to a first battery pack, a second power supply input terminal connectable to a second battery pack, a power supply output terminal for providing a power output, and a drive power supply unit for outputting a drive supply voltage; And A control unit configured to be in a first state, a second state, or a third state, wherein when the control unit is in the first state, it outputs a first control level, when in the second state, it outputs a second control level, and when in the third state, neither the first control level nor the second control level is output; An alarm unit connected to the control unit for receiving an alarm drive level of the control unit to actuate; A first drive unit connected to the control unit and the drive power supply unit for outputting a first drive level when receiving the first control level; A second drive unit connected to the control unit and the drive power supply unit for outputting a second drive 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 both connected to the first drive unit to be respectively turned on when receiving the first drive level; A third drive unit connected to a series node of the first power switch and the second power switch and outputting a third drive 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 both connected to the second drive unit to be respectively turned on when receiving the second drive level; A fourth drive unit connected to a series node of the third power switch and the fourth power switch and outputting a fourth drive level when the third power switch or the fourth power switch is turned on; The control unit is connected to the third drive unit and the fourth drive unit and is configured to output the alarm drive level when in the third state and receiving the third drive level or the fourth drive level, output the alarm drive level when in the second state and receiving the third drive level, or output the alarm drive level when in the first state and receiving the fourth drive level.

2. The power supply device according to claim 1, characterized in that, It further includes a voltage detection unit connected to the power supply output terminal for generating a detection level when there is a voltage output at the power supply output terminal; The control unit is connected to the voltage detection unit and is configured to output the alarm drive level when in the third state and receiving the detection level; Or Output the alarm drive level when in the first state or the second state and there is no detection level.

3. The power supply device according to claim 2, wherein The voltage detection unit includes a resistor R115 and a resistor R125; the resistor R115 and the resistor R125 are connected in series, one end is connected to the power supply output terminal, the other end is grounded, and a series node of the resistor R115 and the resistor R125 is connected to the control unit.

4. The power supply device according to claim 1, wherein, 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.

5. The power supply device according to claim 4, wherein the first power switch includes a plurality of first MOS transistors, a diode D19, a zener diode Z1, a resistor R80, and a resistor R43; the sources of the plurality of first MOS transistors are connected to each other and then connected to the second power switch, the first end of the resistor R80, and the anode of the zener diode Z1, the drains of the plurality of first MOS transistors are connected to each other and then connected to the first power supply input terminal, the gates of the plurality of first MOS transistors are connected to each other and then connected to 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 zener diode Z1, and the cathode of the diode D19 and the second end of the resistor R43 are respectively connected to the first driving switch; and / or the second power switch includes a plurality of second MOS transistors, a diode D21, a zener diode Z4, a resistor R82, and a resistor R60, the sources of the plurality of second MOS transistors are connected to each other and then connected to the first power switch, the anode of the zener diode Z4, and the first end of the resistor R82, the drains of the plurality of second MOS transistors are connected to each other and then connected to the power output terminal, the gates of the plurality of second MOS transistors are connected to each other and then connected to the anode of the diode D21, the cathode of the zener diode 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 to the second driving switch; and / or the first driving switch includes: a triode Q18, a MOS transistor Q19, a zener diode Z5, a resistor R39, a resistor R56, and a resistor R49; the base of the triode Q18 is respectively connected to the first end of the resistor R49 and the control unit, the second end of the resistor R49 is grounded, the emitter of the triode Q18 is grounded, the collector of the triode Q18 is connected to the gate of the MOS transistor Q19 through the resistor R56, the drain of the MOS transistor Q19 is respectively connected to the driving power supply unit, the cathode of the zener diode Z5, and the first end of the resistor R39, the anode of the zener diode Z5 and the second end of the resistor R39 are connected and then connected to the gate of the MOS transistor Q19, and the source of the MOS transistor Q19 is connected to the first power switch; and / or The second driving switch includes: a triode Q22, a MOS transistor Q23, a voltage stabilizing diode Z6, a resistor R61, a resistor R20, and a resistor R65; the base of the triode Q22 is respectively connected to the first end of the resistor R65 and the control unit, the second end of the resistor R65 is grounded, the emitter of the triode Q22 is grounded, the collector of the triode Q22 is connected to the gate of the MOS transistor Q23 via the resistor R20, the drain of the MOS transistor Q23 is respectively connected to the driving power supply unit, the cathode of the voltage stabilizing diode Z6, and the first end of the resistor R61, the anode of the voltage stabilizing diode Z6 and the second end of the resistor R61 are connected and then connected to the gate of the MOS transistor Q23, and the source of the MOS transistor Q23 is connected to the second power switch.

6. The power supply device according to claim 4, wherein the third driving unit includes a first switch unit and a second switch unit; the first end of the first switch unit is connected to the control unit, the second end of the first switch unit is connected to the series node of the first power switch and the second power switch, the third end of the first switch unit is connected to 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 to the control unit.

7. The power supply device according to claim 6, wherein the first switch unit includes a triode Q3, a MOS transistor Q4, a voltage stabilizing diode Z10, a resistor R1, a resistor R13, and a resistor R17; the base of the triode Q3 is connected to the control unit, the base of the triode Q3 is grounded via the resistor R13, the emitter of the triode Q3 is grounded, the collector of the triode Q3 is respectively connected to the gate of the MOS transistor Q4, the anode of the voltage stabilizing diode Z10, and the first end of the resistor R1 via the resistor R17, the drain of the MOS transistor Q4 is respectively connected to the cathode of the voltage stabilizing diode 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 of the MOS transistor Q4 is connected to the first end of the second switch unit; and / or the second switch unit includes a triode Q35, a resistor R21, a resistor R23, and a capacitor C31; the base of the triode Q35 is connected to the first end of the resistor R21 and the first end of the resistor R23, the second end of the resistor R21 is respectively connected to the third end of the first switch unit and the first end of the capacitor C31, the second ends of the capacitor C31 and the resistor R23 are respectively grounded, the emitter of the triode Q35 is grounded, and the collector of the triode Q35 is respectively connected to the control unit and a DC power supply.

8. The power supply device according to claim 7, characterized in that It further includes a fifth driving unit; the input end of the fifth driving unit is connected to the third end of the first switch unit, and the output end of the fifth driving unit is connected to the second driving unit.

9. The power supply device according to claim 8, characterized in that, The fifth driving unit includes 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 switching unit via the resistor R112. The gate of the MOS transistor Q17 is also grounded via the parallel connection of the resistor R113 and the capacitor C33. The source of the MOS transistor Q17 is grounded. The drain of the MOS transistor Q17 is respectively connected to the cathodes of the diode D4 and the diode D7. The anodes of the diode D4 and the diode D7 are respectively connected to the second driving unit.

10. The power supply device according to claim 1, characterized in that, 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.

11. The power supply device according to claim 10, wherein The third power switch includes a plurality of third MOS transistors, a diode D18, a zener diode Z2, a resistor R110, and a resistor R48. The sources of the plurality of third MOS transistors are connected to each other and then connected to the fourth power switch, the first end of the resistor R110, and the anode of the zener diode Z2. The drains of the plurality of third MOS transistors are connected to each other and then connected to the second power supply input terminal. The gates of the plurality of third MOS transistors are connected to each other and then connected to 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 zener diode Z2. The cathode of the diode D18 and the second end of the resistor R48 are respectively connected to the third driving switch; and / or The fourth power switch includes a plurality of fourth MOS transistors, a diode D31, a zener diode Z3, a resistor R12, and a resistor R117. The sources of the plurality of fourth MOS transistors are connected to each other and then connected to the third power switch, the anode of the zener diode Z3, and the first end of the resistor R117. The drains of the plurality of fourth MOS transistors are connected to each other and then connected to the power output terminal. The gates of the plurality of fourth MOS transistors are connected to each other and then connected to the anode of the diode D31, the cathode of the zener diode Z3, the second end of the resistor R117, and the first end of the resistor R12. The cathode of the diode D31 and the second end of the resistor R12 are connected to the fourth driving switch; and / or The third driving switch includes: a triode Q14, a MOS transistor Q15, a zener diode Z8, a resistor R38, a resistor R53, and a resistor R41. The base of the triode Q14 is respectively connected to the first end of the resistor R41 and the control unit. The second end of the resistor R41 is grounded. The emitter of the triode Q14 is grounded. The collector of the triode Q14 is connected to the gate of the MOS transistor Q15 via the resistor R53. The drain of the MOS transistor Q15 is respectively connected to the driving power supply unit, the cathode of the zener diode Z8, and the first end of the resistor R38. The anode of the zener diode Z8 and the second end of the resistor R38 are connected and then connected to the gate of the MOS transistor Q15. The source of the MOS transistor Q15 is connected to the third power switch; and / or The fourth driving switch includes: triode Q20, MOS transistor Q24, zener diode Z9, resistor R63, resistor R25, and resistor R16; the base of the triode Q20 is respectively connected to the first end of the resistor R16 and the control unit, the second end of the resistor R16 is grounded, the emitter of the triode Q20 is grounded, the collector of the triode Q20 is connected to the gate of the MOS transistor Q24 through the resistor R25, the drain of the MOS transistor Q24 is respectively connected to the driving power supply unit, the cathode of the zener diode Z9, and the first end of the resistor R63, the anode of the zener diode Z9 and the second end of the resistor R63 are connected and then connected to the gate of the MOS transistor Q24, and the source of the MOS transistor Q24 is connected to the fourth power switch.

12. The power supply device according to claim 10, wherein the fourth driving unit includes a third switching unit and a fourth switching unit; the first end of the third switching unit is connected to the control unit, the second end of the third switching unit is connected to the series node of the third power switch and the fourth power switch, the third end of the third switching unit is connected to the first end of the fourth switching unit, the second end of the fourth switching unit is grounded, and the third end of the fourth switching unit is connected to the control unit.

13. The power supply device according to claim 12, wherein the third switching unit includes triode Q5, MOS transistor Q5, zener diode Z14, resistor R19, resistor R22, and resistor R27; the base of the triode Q5 is connected to the control unit, the base of the triode Q5 is grounded through the resistor R22, the emitter of the triode Q5 is grounded, the collector of the triode Q5 is respectively connected to the gate of the MOS transistor Q1, the anode of the zener diode Z11, and the first end of the resistor R19 through the resistor R27, the drain of the MOS transistor Q5 is respectively connected to the cathode of the zener diode 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 of the MOS transistor Q5 is connected to the first end of the fourth switching unit; and / or the fourth switching unit includes triode Q37, resistor R145, resistor R47, and capacitor C50; the base of the triode Q37 is respectively 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 respectively connected to the third end of the third switching unit and the first end of the capacitor C50, the second ends of the resistor R47 and the capacitor C50 are respectively grounded, the emitter of the triode Q37 is grounded, and the collector of the triode Q37 is connected to the control unit and a DC power supply.

14. The power supply device according to claim 13, wherein It further includes a sixth driving unit; the input end of the sixth driving unit is connected to the third end of the third switching unit, and the output end of the sixth driving unit is connected to the first driving unit.

15. The power supply device according to claim 14, wherein The sixth driving unit includes an 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 also grounded through the parallel-connected resistor R118 and the capacitor C34. 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. The anodes of the diode D5 and the diode D6 are respectively connected to the first driving unit.

16. The power supply device according to claim 1, characterized in that, The warning unit includes a plurality of light-emitting diodes; The anode of the light-emitting diode is connected to a power supply, and the cathode of the light-emitting diode is connected to the control unit.

17. An electronic device, characterized in that, It includes the power supply device according to any one of claims 1 to 16.

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