CN211266781U - High-power supply board - Google Patents
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- CN211266781U CN211266781U CN201922042783.0U CN201922042783U CN211266781U CN 211266781 U CN211266781 U CN 211266781U CN 201922042783 U CN201922042783 U CN 201922042783U CN 211266781 U CN211266781 U CN 211266781U
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Abstract
The utility model relates to the technical field of power supply equipment, and aims to provide a high-power supply board, which comprises an input filter circuit, a DC/DC conversion circuit, a positive power supply output circuit, a reverse negative power supply circuit and a negative power supply output end; the input end of the input filter circuit is connected with an external power supply, and the output end of the input filter circuit is connected with the input end of the DC/DC conversion circuit; the input end of the positive power supply output circuit and the input end of the negative power supply switching circuit are both connected with the output end of the DC/DC conversion circuit; the output end of the negative power supply conversion circuit is connected with the output end of the negative power supply. The utility model has the advantages of export positive, negative power simultaneously, reduce design cost.
Description
Technical Field
The utility model relates to a power supply unit's technical field, concretely relates to high-power strip.
Background
At present, generally, in order to meet normal work, reduce abnormal work and realize an ideal state of zero input and zero output, an existing operational amplifier needs to provide positive and negative power supplies for the operational amplifier. The common implementation mode includes that positive and negative power supplies are respectively generated after the output of two groups of windings is rectified by using a transformer, the positive and negative power supplies are respectively realized by using two DC-DC chips, the positive and negative power supplies are generated by using one DC-DC chip and one transformer, and the positive and negative power supplies are generated by using two groups of transistors and inductors. The prior art has complex design and layout and large power consumption.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high-power strip has the advantage of exporting positive, negative power simultaneously, reduction design cost.
In order to achieve the above object, the utility model adopts the following technical scheme: a high-power panel comprises an input filter circuit, a DC/DC conversion circuit, a positive power output circuit, a reverse negative power circuit and a negative power output end;
the input end of the input filter circuit is connected with an external power supply, and the output end of the input filter circuit is connected with the input end of the DC/DC conversion circuit;
the input end of the positive power supply output circuit and the input end of the negative power supply switching circuit are both connected with the output end of the DC/DC conversion circuit;
and the output end of the negative power supply conversion circuit is connected with the negative power supply output end.
Preferably, the input filter circuit comprises a bridge rectifier circuit.
Preferably, the DC/DC conversion circuit includes a three-terminal regulator.
Preferably, the negative power supply circuit comprises a TPS63700 inverting DC/DC converter.
Preferably, the positive power output circuit comprises a negative voltage detection circuit, an overvoltage detection circuit, a judgment circuit, an MOS transistor switch circuit and a positive power output interface;
the negative voltage detection circuit is used for sampling the output voltage of the reverse negative power supply circuit and detecting whether the reverse negative power supply circuit outputs negative voltage;
the overvoltage detection circuit is used for sampling the output voltage of the DC/DC conversion circuit and detecting whether the output voltage of the DC/DC conversion circuit is overvoltage or not;
the output end of the negative voltage detection circuit and the output end of the overvoltage detection circuit are respectively connected with two input ends of a judgment circuit, and the judgment circuit is used for controlling the turn-off of the MOS tube switching circuit;
the MOS tube switching circuit is connected in series between the output end of the DC/DC conversion circuit and the positive power output interface.
Preferably, the negative voltage detection circuit comprises a first capacitor C1, a second capacitor C2, a bidirectional ESD protection diode, a first resistor R1, a second resistor R2, a first diode D1, a second diode D2, and a first voltage comparator U1,
a first reference voltage VREF1 is input to one end of the first resistor R1, a second resistor R2 is connected to the other end of the first resistor R1, and the other end of the second resistor R2 is connected with the output end of the reverse negative power supply circuit;
the cathode of the first diode D1 is connected with one end of a first resistor R1, which inputs a first reference voltage VREF1, the anode of the first diode D1 is connected with the cathode of a second diode D2, the anode of the second diode D2 is grounded, and the connecting node of the first resistor R1 and the second resistor R2 is connected with the connecting node of the first diode D1 and the second diode D2;
one end of the bidirectional ESD protection diode is connected with a connection node of a first resistor R1 and a second resistor R2, and the other end of the bidirectional ESD protection diode is grounded;
the first capacitor C1 is connected in parallel to the bidirectional ESD protection diode, one end of a third resistor R3 is connected to the bidirectional ESD protection diode and one end of the first resistor R1 connected to the connection node of the second resistor R2, the other end of the third resistor is connected to the non-inverting terminal of the first voltage comparator U1, and the inverting terminal of the first voltage comparator U1 is connected to a second reference voltage VREF 2.
Preferably, the overvoltage detection circuit comprises a sampling circuit, a differential following operational amplifier circuit, an RC low-pass filter and a second voltage comparator U2 which are connected in sequence, an output end of the RC low-pass filter is connected with a non-inverting end of the second voltage comparator U2, and an inverting end of the second voltage comparator U2 is connected with a third reference voltage VREF 3.
Preferably, the judging circuit comprises a first nor gate U3, an output terminal of the first voltage comparator U1 is connected with one input terminal of a first nor gate U3, the second voltage comparator U2 is connected with the other input terminal of a first nor gate U3, and an output terminal of the first nor gate U3 is connected with the MOS transistor switching circuit.
Preferably, the judging circuit includes an or gate U4 and a second nor gate U5, an output end of the first voltage comparator U1 is connected to one input end of the or gate U4, an external control signal is input to the other end of the or gate U4, the or gate U4 is connected to one input end of the second nor gate U5, an output end of the second voltage comparator U2 is connected to the other input end of the second nor gate U5, and an output end of the second nor gate U5 is connected to the MOS transistor switching circuit.
Preferably, the MOS transistor switch circuit includes a PMOS transistor Q2, a transistor Q1, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a third capacitor C3;
one end of each of the third resistor R3 and the fourth resistor R4 is connected with the output end of the judging circuit, the other end of the third resistor R3 is grounded, the other end of the fourth resistor R4 is connected with the base b of the triode Q1, and the emitter e of the triode Q1 is grounded;
one end of the fifth resistor R5 and one end of the sixth resistor R6 are both connected with the collector C of the triode Q1, the G pole of the PMOS tube Q2 and one end of the third capacitor C3 are both connected with the other end of the fifth resistor R5, the other end of the third capacitor C3 and the other end of the sixth resistor R6 are both connected with the S pole of the PMOS tube Q2, and the S pole of the PMOS tube Q2 is also connected with the output end of the DC/DC conversion circuit.
To sum up, the beneficial effects of the utility model are that:
1. the utility model has the advantages of simultaneously outputting positive and negative power supplies and reducing design cost;
2. the utility model discloses a positive power output circuit detects negative power supply circuit and DC/DC converting circuit in the reversal, when negative power supply circuit or DC/DC converting circuit work is unusual, in time cuts off DC/DC converting circuit from the output of positive power output interface, reduces the energy consumption loss.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the present invention for showing an input filter circuit and a DC/DC conversion circuit;
fig. 3 is a schematic circuit diagram for showing the reverse negative power supply circuit of the present invention;
fig. 4 is a schematic circuit diagram for showing the negative pressure detection circuit of the present invention;
fig. 5 is a schematic circuit diagram of the sampling circuit, the differential following operational amplifier circuit and the RC low pass filter for showing the overvoltage detection circuit of the present invention;
fig. 6 is a schematic circuit diagram of a second voltage comparator for showing the overvoltage detection circuit according to the present invention;
fig. 7 is a schematic circuit diagram of a judgment circuit according to embodiment 1 of the present invention;
fig. 8 is a schematic circuit diagram of a judgment circuit according to embodiment 2 of the present invention;
fig. 9 is a schematic circuit diagram of the present invention for showing the MOS transistor switch circuit.
Detailed Description
The technical solution in the embodiments of the present invention is clearly and completely described below with reference to fig. 1 to 9 of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1, a high-power panel includes an input filter circuit, a DC/DC conversion circuit, a positive power output circuit, a reverse negative power circuit, and a negative power output terminal;
the input end of the input filter circuit is connected with an external power supply, and the output end of the input filter circuit is connected with the input end of the DC/DC conversion circuit;
the input end of the positive power supply output circuit and the input end of the negative power supply switching circuit are both connected with the output end of the DC/DC conversion circuit;
the output end of the negative power supply conversion circuit is connected with the output end of the negative power supply.
Referring to fig. 2, the input filter circuit comprises a bridge rectifier circuit, the DC/DC conversion circuit comprises an LM7805CK three-terminal voltage regulator, and the input filter circuit and the DC/DC conversion circuit cooperate to convert 220V commercial power into +5V direct current for output.
Referring to fig. 3, the negative power supply inverting circuit includes a TPS63700 inverting DC/DC converter for inverting +5V DC to-5V DC.
It is worth to be noted that the positive power output circuit comprises a negative voltage detection circuit, an overvoltage detection circuit, a judgment circuit, an MOS tube switch circuit and a positive power output interface;
the negative voltage detection circuit is used for sampling the output voltage of the reverse negative power supply circuit and detecting whether the reverse negative power supply circuit outputs negative voltage;
the overvoltage detection circuit is used for sampling the output voltage of the DC/DC conversion circuit and detecting whether the output voltage of the DC/DC conversion circuit is overvoltage or not;
the output end of the negative voltage detection circuit and the output end of the overvoltage detection circuit are respectively connected with two input ends of a judgment circuit, and the judgment circuit is used for controlling the turn-off of the MOS tube switching circuit;
the MOS tube switching circuit is connected in series between the output end of the DC/DC conversion circuit and the positive power output interface.
Referring to fig. 4, the negative voltage detecting circuit includes a first capacitor C1, a second capacitor C2, a bidirectional ESD protection diode, a first resistor R1, a second resistor R2, a first diode D1, a second diode D2, and a first voltage comparator U1,
a first reference voltage VREF1 is input to one end of the first resistor R1, the other end of the first resistor R1 is connected with a second resistor R2, and the other end of the second resistor R2 is connected with the output end of the reverse negative power supply circuit;
the cathode of the first diode D1 is connected with one end of the first resistor R1, which inputs the first reference voltage VREF1, the anode of the first diode D1 is connected with the cathode of the second diode D2, the anode of the second diode D2 is grounded, and the connection node of the first resistor R1 and the second resistor R2 is connected with the connection node of the first diode D1 and the second diode D2;
one end of the bidirectional ESD protection diode is connected with a connection node of the first resistor R1 and the second resistor R2, and the other end of the bidirectional ESD protection diode is grounded;
the first capacitor C1 is connected in parallel to the bidirectional ESD protection diode, one end of the third resistor R3 is connected to the bidirectional ESD protection diode and one end of the first resistor R1 connected to the connection node of the second resistor R2, the other end of the third resistor is connected to the non-inverting terminal of the first voltage comparator U1, and the inverting terminal of the first voltage comparator U1 is connected to the second reference voltage VREF 2.
The connection point of the first resistor R1 and the second resistor R2 is a voltage sampling point, and the normal variation range is 0-VREF 1; the first resistor R1 and the second resistor R2 are configured so that when the voltage at the sampling point is 0-2.5V, the voltage to be measured changes within the range of-24.15V-0. And comparing the voltage of the sampling point with a second reference voltage VREF2, judging whether the negative power supply output by the negative power supply switching circuit is overvoltage or not, and if the negative power supply is overvoltage, outputting a high level by a first voltage comparator U1.
Referring to fig. 5 and 6, the overvoltage detection circuit includes a sampling circuit, a differential following operational amplifier circuit, an RC low-pass filter and a second voltage comparator U2 connected in sequence, an output terminal of the RC low-pass filter is connected to a non-inverting terminal of the second voltage comparator U2, and an inverting terminal of the second voltage comparator U2 is connected to a third reference voltage VREF 3.
The sampling voltage of the output end of the DC/DC conversion circuit passes through a seventeenth resistor R47, a fifty resistor R50 and a fifty first resistor R51, is divided, passes through a differential following operational amplifier circuit, and then passes through an RC low-pass filter for filtering and inputting into a second voltage comparator U2, when the sampling voltage is overvoltage, the voltage input into the second voltage comparator U2 is greater than a third reference voltage VREF3, and the second voltage comparator U2 outputs a high level.
Referring to fig. 7 and 9, the determining circuit includes a first nor gate U3, an output terminal of a first voltage comparator U1 is connected to one input terminal of a first nor gate U3, a second voltage comparator U2 is connected to the other input terminal of a first nor gate U3, and an output terminal of a first nor gate U3 is connected to the MOS transistor switching circuit. The MOS tube switching circuit comprises a PMOS tube Q2, a triode Q1, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a third capacitor C3; one ends of a third resistor R3 and a fourth resistor R4 are both connected with the output end of the judging circuit, the other end of the third resistor R3 is grounded, the other end of the fourth resistor R4 is connected with a base electrode b of a triode Q1, and an emitter electrode e of the triode Q1 is grounded; one end of a fifth resistor R5 and one end of a sixth resistor R6 are both connected with the collector C of the triode Q1, the G pole of the PMOS tube Q2 and one end of the third capacitor C3 are both connected with the other end of the fifth resistor R5, the other end of the third capacitor C3 and the other end of the sixth resistor R6 are both connected with the S pole of the PMOS tube Q2, and the S pole of the PMOS tube Q2 is also connected with the output end of the DC/DC conversion circuit.
When any one of the first comparator U1 and the second comparator U2 outputs a high level, the first NOR gate U3 outputs a low level to the triode Q1 of the MOS tube switching circuit, so that the triode Q1 is cut off, the PMOS tube Q2 is cut off, and the output current of the DC/DC conversion circuit cannot flow to the positive power supply output interface, so that when the reverse negative power supply circuit or the DC/DC conversion circuit works abnormally, the output of the DC/DC conversion circuit from the positive power supply output interface is cut off in time, and the energy consumption loss is reduced.
Example 2
Referring to fig. 1, a high-power panel includes an input filter circuit, a DC/DC conversion circuit, a positive power output circuit, a reverse negative power circuit, and a negative power output terminal;
the input end of the input filter circuit is connected with an external power supply, and the output end of the input filter circuit is connected with the input end of the DC/DC conversion circuit;
the input end of the positive power supply output circuit and the input end of the negative power supply switching circuit are both connected with the output end of the DC/DC conversion circuit;
the output end of the negative power supply conversion circuit is connected with the output end of the negative power supply.
Referring to fig. 2, the input filter circuit comprises a bridge rectifier circuit, the DC/DC conversion circuit comprises an LM7805CK three-terminal voltage regulator, and the input filter circuit and the DC/DC conversion circuit cooperate to convert 220V commercial power into +5V direct current for output.
Referring to fig. 3, the negative power supply inverting circuit includes a TPS63700 inverting DC/DC converter for inverting +5V DC to-5V DC.
It is worth to be noted that the positive power output circuit comprises a negative voltage detection circuit, an overvoltage detection circuit, a judgment circuit, an MOS tube switch circuit and a positive power output interface;
the negative voltage detection circuit is used for sampling the output voltage of the reverse negative power supply circuit and detecting whether the reverse negative power supply circuit outputs negative voltage;
the overvoltage detection circuit is used for sampling the output voltage of the DC/DC conversion circuit and detecting whether the output voltage of the DC/DC conversion circuit is overvoltage or not;
the output end of the negative voltage detection circuit and the output end of the overvoltage detection circuit are respectively connected with two input ends of a judgment circuit, and the judgment circuit is used for controlling the turn-off of the MOS tube switching circuit;
the MOS tube switching circuit is connected in series between the output end of the DC/DC conversion circuit and the positive power output interface.
Referring to fig. 4, the negative voltage detecting circuit includes a first capacitor C1, a second capacitor C2, a bidirectional ESD protection diode, a first resistor R1, a second resistor R2, a first diode D1, a second diode D2, and a first voltage comparator U1,
a first reference voltage VREF1 is input to one end of the first resistor R1, the other end of the first resistor R1 is connected with a second resistor R2, and the other end of the second resistor R2 is connected with the output end of the reverse negative power supply circuit;
the cathode of the first diode D1 is connected with one end of the first resistor R1, which inputs the first reference voltage VREF1, the anode of the first diode D1 is connected with the cathode of the second diode D2, the anode of the second diode D2 is grounded, and the connection node of the first resistor R1 and the second resistor R2 is connected with the connection node of the first diode D1 and the second diode D2;
one end of the bidirectional ESD protection diode is connected with a connection node of the first resistor R1 and the second resistor R2, and the other end of the bidirectional ESD protection diode is grounded;
the first capacitor C1 is connected in parallel to the bidirectional ESD protection diode, one end of the third resistor R3 is connected to the bidirectional ESD protection diode and one end of the first resistor R1 connected to the connection node of the second resistor R2, the other end of the third resistor is connected to the non-inverting terminal of the first voltage comparator U1, and the inverting terminal of the first voltage comparator U1 is connected to the second reference voltage VREF 2.
The connection point of the first resistor R1 and the second resistor R2 is a voltage sampling point, and the normal variation range is 0-VREF 1; the first resistor R1 and the second resistor R2 are configured so that when the voltage at the sampling point is 0-2.5V, the voltage to be measured changes within the range of-24.15V-0. And comparing the voltage of the sampling point with a second reference voltage VREF2, judging whether the negative power supply output by the negative power supply switching circuit is overvoltage or not, and if the negative power supply is overvoltage, outputting a high level by a first voltage comparator U1.
Referring to fig. 5 and 6, the overvoltage detection circuit includes a sampling circuit, a differential following operational amplifier circuit, an RC low-pass filter and a second voltage comparator U2 connected in sequence, an output terminal of the RC low-pass filter is connected to a non-inverting terminal of the second voltage comparator U2, and an inverting terminal of the second voltage comparator U2 is connected to a third reference voltage VREF 3.
The sampling voltage of the output end of the DC/DC conversion circuit passes through a seventeenth resistor R47, a fifty resistor R50 and a fifty first resistor R51, is divided, passes through a differential following operational amplifier circuit, and then passes through an RC low-pass filter for filtering and inputting into a second voltage comparator U2, when the sampling voltage is overvoltage, the voltage input into the second voltage comparator U2 is greater than a third reference voltage VREF3, and the second voltage comparator U2 outputs a high level.
Referring to fig. 8 and 9, the determining circuit includes an or gate U4 and a second nor gate U5, an output terminal of the first voltage comparator U1 is connected to an input terminal of the or gate U4, an external control signal is input to the other terminal of the or gate U4, the or gate U4 is connected to an input terminal of the second nor gate U5, an output terminal of the second voltage comparator U2 is connected to another input terminal of the second nor gate U5, and an output terminal of the second nor gate U5 is connected to the MOS transistor switching circuit. The MOS tube switching circuit comprises a PMOS tube Q2, a triode Q1, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a third capacitor C3; one ends of a third resistor R3 and a fourth resistor R4 are both connected with the output end of the judging circuit, the other end of the third resistor R3 is grounded, the other end of the fourth resistor R4 is connected with a base electrode b of a triode Q1, and an emitter electrode e of the triode Q1 is grounded; one end of a fifth resistor R5 and one end of a sixth resistor R6 are both connected with the collector C of the triode Q1, the G pole of the PMOS tube Q2 and one end of the third capacitor C3 are both connected with the other end of the fifth resistor R5, the other end of the third capacitor C3 and the other end of the sixth resistor R6 are both connected with the S pole of the PMOS tube Q2, and the S pole of the PMOS tube Q2 is also connected with the output end of the DC/DC conversion circuit.
When any one of the first comparator U1 and the external control signal outputs high level, the OR gate U4 outputs high level to the second NOR gate U5, when the OR gate U4 outputs high level or the second voltage comparator U2 outputs high level, the second NOR gate U5 outputs low level, the triode Q1 of the MOS tube switching circuit cuts off the triode Q1, the PMOS tube Q2 cuts off, so that the output current of the DC/DC conversion circuit cannot flow to the positive power output interface, therefore, when the reverse negative power circuit or the DC/DC conversion circuit works abnormally, the output of the DC/DC conversion circuit from the positive power output interface is cut off in time, and the energy consumption loss is reduced.
In the description of the present invention, it should be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Claims (10)
1. A high-power panel is characterized by comprising an input filter circuit, a DC/DC conversion circuit, a positive power output circuit, a reverse negative power circuit and a negative power output interface;
the input end of the input filter circuit is connected with an external power supply, and the output end of the input filter circuit is connected with the input end of the DC/DC conversion circuit;
the input end of the positive power supply output circuit and the input end of the negative power supply switching circuit are both connected with the output end of the DC/DC conversion circuit;
and the output end of the negative power supply conversion circuit is connected with the negative power supply output end.
2. The power strip of claim 1, wherein said input filter circuit comprises a bridge rectifier circuit.
3. The power strip of claim 1, wherein said DC/DC converter circuit comprises a three-terminal regulator.
4. The high power supply board of claim 1, wherein the negative power conversion circuit comprises a TPS63700 inverting DC/DC converter.
5. The high-power supply board according to any one of claims 1 to 4, wherein the positive power supply output circuit comprises a negative voltage detection circuit, an overvoltage detection circuit, a judgment circuit, a MOS tube switch circuit and a positive power supply output interface;
the negative voltage detection circuit is used for sampling the output voltage of the reverse negative power supply circuit and detecting whether the reverse negative power supply circuit outputs negative voltage;
the overvoltage detection circuit is used for sampling the output voltage of the DC/DC conversion circuit and detecting whether the output voltage of the DC/DC conversion circuit is overvoltage or not;
the output end of the negative voltage detection circuit and the output end of the overvoltage detection circuit are respectively connected with two input ends of a judgment circuit, and the judgment circuit is used for controlling the turn-off of the MOS tube switching circuit;
the MOS tube switching circuit is connected in series between the output end of the DC/DC conversion circuit and the positive power output interface.
6. The high power supply board of claim 5, wherein the negative voltage detection circuit comprises a first capacitor C1, a second capacitor C2, a bidirectional ESD protection diode, a first resistor R1, a second resistor R2, a first diode D1, a second diode D2 and a first voltage comparator U1,
a first reference voltage VREF1 is input to one end of the first resistor R1, a second resistor R2 is connected to the other end of the first resistor R1, and the other end of the second resistor R2 is connected with the output end of the reverse negative power supply circuit;
the cathode of the first diode D1 is connected with one end of a first resistor R1, which inputs a first reference voltage VREF1, the anode of the first diode D1 is connected with the cathode of a second diode D2, the anode of the second diode D2 is grounded, and the connecting node of the first resistor R1 and the second resistor R2 is connected with the connecting node of the first diode D1 and the second diode D2;
one end of the bidirectional ESD protection diode is connected with a connection node of a first resistor R1 and a second resistor R2, and the other end of the bidirectional ESD protection diode is grounded;
the first capacitor C1 is connected in parallel to the bidirectional ESD protection diode, one end of a third resistor R3 is connected to the bidirectional ESD protection diode and one end of the first resistor R1 connected to the connection node of the second resistor R2, the other end of the third resistor is connected to the non-inverting terminal of the first voltage comparator U1, and the inverting terminal of the first voltage comparator U1 is connected to a second reference voltage VREF 2.
7. The high-power supply board according to claim 6, wherein the over-voltage detection circuit comprises a sampling circuit, a differential following operational amplifier circuit, an RC low-pass filter and a second voltage comparator U2 which are connected in sequence, an output end of the RC low-pass filter is connected with a non-inverting end of the second voltage comparator U2, and an inverting end of the second voltage comparator U2 is connected with a third reference voltage VREF 3.
8. The power strip of claim 7, wherein the determining circuit comprises a first nor gate U3, an output terminal of the first voltage comparator U1 is connected to one input terminal of a first nor gate U3, the second voltage comparator U2 is connected to the other input terminal of a first nor gate U3, and an output terminal of the first nor gate U3 is connected to the MOS switch circuit.
9. The power strip of claim 7, wherein the determining circuit comprises an or gate U4 and a second nor gate U5, an output terminal of the first voltage comparator U1 is connected to an input terminal of an or gate U4, an external control signal is input to the other terminal of the or gate U4, the or gate U4 is connected to an input terminal of a second nor gate U5, an output terminal of the second voltage comparator U2 is connected to another input terminal of the second nor gate U5, and an output terminal of the second nor gate U5 is connected to the MOS transistor switch circuit.
10. The power strip of claim 8 or 9, wherein the MOS switch circuit comprises a PMOS transistor Q2, a transistor Q1, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a third capacitor C3;
one end of each of the third resistor R3 and the fourth resistor R4 is connected with the output end of the judging circuit, the other end of the third resistor R3 is grounded, the other end of the fourth resistor R4 is connected with the base b of the triode Q1, and the emitter e of the triode Q1 is grounded;
one end of the fifth resistor R5 and one end of the sixth resistor R6 are both connected with the collector C of the triode Q1, the G pole of the PMOS tube Q2 and one end of the third capacitor C3 are both connected with the other end of the fifth resistor R5, the other end of the third capacitor C3 and the other end of the sixth resistor R6 are both connected with the S pole of the PMOS tube Q2, and the S pole of the PMOS tube Q2 is also connected with the output end of the DC/DC conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922042783.0U CN211266781U (en) | 2019-11-22 | 2019-11-22 | High-power supply board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922042783.0U CN211266781U (en) | 2019-11-22 | 2019-11-22 | High-power supply board |
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| CN211266781U true CN211266781U (en) | 2020-08-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803360A (en) * | 2020-12-31 | 2021-05-14 | 广州极飞科技股份有限公司 | Surge protection circuit, surge protection method and battery power supply circuit |
| CN115562109A (en) * | 2022-09-28 | 2023-01-03 | 兰州空间技术物理研究所 | Standardized space biological culture module interface circuit |
-
2019
- 2019-11-22 CN CN201922042783.0U patent/CN211266781U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803360A (en) * | 2020-12-31 | 2021-05-14 | 广州极飞科技股份有限公司 | Surge protection circuit, surge protection method and battery power supply circuit |
| CN115562109A (en) * | 2022-09-28 | 2023-01-03 | 兰州空间技术物理研究所 | Standardized space biological culture module interface circuit |
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