Power supply control device

Abstract

The utility model discloses a power supply control device, which comprises a power supply switch, a first control circuit and a second control circuit, and is characterized in that a power supply is connected with a power utilization circuit through the power supply switch; the input end of the first control circuit is connected with the power supply, and the output end is connected with the control end of the power supply switch; the input end of the second control circuit is connected with the power utilization circuit, and the output end is connected with the control end of the power supply switch. The power supply switch is controlled through the first control circuit and the second control circuit, the power utilization circuit can also control the power supply switch, and the control efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power management technical field, concretely relates to a power control device. BACKGROUND

[0002] In the actual use process of electronic equipment, power supply of the power equipment is often cut off after detecting the abnormal state of the power equipment, and the conventional operation is to cut off the external power supply through the relay; after the state is recovered, the power supply of the power equipment is supplied through the relay; the control of the relay depends on the external power supply, and the power equipment is difficult to control the relay. UTILITY MODEL CONTENTS

[0003] In view of the above technical problems existing in the prior art, the utility model provides a power control device, and the power equipment can cut off the power supply.

[0004] The utility model discloses a power control device, including power supply switch, first control circuit and second control circuit, and power supply is connected with the power circuit through power supply switch, the input of first control circuit is connected with power supply, and the control end of power supply switch is connected with the output, the input of second control circuit is connected with the power circuit, and the control end of power supply switch is connected with the output.

[0005] Preferably, the power supply switch includes a first electric control switch; the input of the first electric control switch is connected with the power supply, and the output is connected with the power circuit.

[0006] Preferably, the output of the first control circuit or the second control circuit is connected with the control end of the first electric control switch through the seventh resistance, the triode and the fourth resistance.

[0007] Preferably, the power supply is connected with the control end of the first electric control switch through the first resistance;

[0008] One end of the seventh resistance is connected with the base of the triode and the eighth resistance,

[0009] the emitter of the triode and the eighth resistance are grounded,

[0010] the collector of the triode is connected with the fourth resistance.

[0011] Preferably, the first control circuit or the second control circuit includes a programmable logic device, and the control signal output end of the programmable logic device is connected with the control end of the power supply switch through the ninth resistance and the diode.

[0012] Preferably, the power input end of the programmable logic device is connected with the voltage stabilizing circuit;

[0013] the output of the voltage stabilizing circuit is grounded through the eighth capacitor;

[0014] The programmable logic device comprises a microprocessor.

[0015] Preferably, the voltage stabilizing circuit comprises a linear voltage stabilizer,

[0016] The input power supply is connected with the VIN end and the EN end of the linear voltage stabilizer, and the Vout end is connected with the first control circuit or the second control circuit.

[0017] Preferably, the VIN end of the linear voltage stabilizer is grounded through a first capacitor group, the first capacitor group comprising a ninth capacitor and a tenth capacitor in parallel; and the Vout end is grounded through a second capacitor group, the second capacitor group comprising a first capacitor and a second capacitor in parallel.

[0018] Compared with the prior art, the power supply switch is controlled through the first control circuit and the second control circuit respectively, and the power supply switch can also be controlled by the power consumption circuit, so that the control efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a logic block diagram of the power supply control device of the utility model;

[0020] Figure 2 is a circuit schematic diagram of the power supply switch;

[0021] Figure 3 is a schematic diagram of the switch control circuit;

[0022] Figure 4 is a schematic diagram of the voltage stabilizing circuit.

[0023] Marked in the figure: 1 power supply, 2 power supply switch, 3 power consumption circuit, 4 first control circuit, 5 second control circuit, 6 voltage stabilizing circuit,

[0024] VCC12 input power supply,

[0025] R1 first resistor, R4 fourth resistor, R7 seventh resistor, R8 eighth resistor, R9 ninth resistor,

[0026] D5 diode, Q1 first electric control switch, Q2 triode, U3 programmable logic device, U4 linear voltage stabilizer,

[0027] C1 first capacitor, C2 second capacitor, C8 eighth capacitor, C9 ninth capacitor, C10 tenth capacitor. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model.

[0029] The utility model will be described in further detail in combination with the drawings below:

[0030] A power control device, such as Figure 1 , comprises a power supply switch 2, a first control circuit 4 and a second control circuit 5, and the power supply 1 is connected with the power consumption circuit 3 through the power supply switch 2; the input end of the first control circuit 4 is connected with the power supply 1, and the output end is connected with the control end of the power supply switch; the input end of the second control circuit 5 is connected with the power consumption circuit 3, and the output end is connected with the control end of the power supply switch.

[0031] The power supply switch can be controlled through the first control circuit and the second control circuit respectively, and the power consumption circuit can also control the power supply switch, so that the control efficiency is improved; the first control circuit is closed after the second control circuit outputs a control signal or the first control circuit is opened for a period of time.

[0032] More specifically, the main power supply switch 2 is closed by default, when the external direct current power supply is connected, the power supply switch 2 is powered on through the first control circuit, and the main power supply switch 2 is opened for a period of time, and waits for the power supply to be stable; the first control circuit 4 is closed after the second control circuit 5 outputs a control signal, at this time, the power supply switch is only controlled by the second control circuit 5.

[0033] When the device works and encounters unexpected situations that need to be powered off, the second control circuit 5 closes the output control signal, the main power supply switch is closed, and the device stops working. If the device needs to be restarted, the power supply is powered off and powered on again to restore the normal work of the circuit.

[0034] As Figure 2 , the power supply switch 2 comprises a first electric control switch Q1; the input end of the first electric control switch Q1 is connected with the power supply 1, and the output end is connected with the power consumption circuit. Among them, the first electric control switch Q1 can adopt MOS tube, MOSFET or relay, and in a specific embodiment, the model of the first electric control switch Q1 is LT40P22SR.

[0035] More specifically, the output end of the first control circuit 4 or the second control circuit 5 is connected with the control end of the first electrically controlled switch Q1 through the seventh resistor R7, the transistor Q2 and the fourth resistor R4. The power supply 1 is connected with the control end of the first electrically controlled switch Q1 through the first resistor R1. One end of the seventh resistor R7 is connected with the base of the transistor Q2 and the eighth resistor R8, the emitter of the transistor Q2 is grounded, and the collector of the transistor Q2 is connected with the fourth resistor R4.

[0036] As Figure 3 , the first control circuit or the second control circuit comprises a programmable logic device U3, and a control signal output end of the programmable logic device U3 is connected with the control end of the power supply switch 2 through the ninth resistor R9 and the diode D5. The power supply input end of the programmable logic device U3 is connected with the voltage stabilizing circuit 6, and the output end of the voltage stabilizing circuit 6 is grounded through the eighth capacitor C8. The programmable logic device (U3) can adopt a microprocessor. In a specific embodiment, the model of the microprocessor is MX810S, but is not limited thereto.

[0037] As Figure 4 , the voltage stabilizing circuit 6 comprises a linear voltage stabilizer U4, and the input power supply VCC12 is connected with the VIN end and the EN end of the linear voltage stabilizer U4, and the Vout end is connected with the first control circuit 4 or the second control circuit 5. The VIN end of the linear voltage stabilizer U4 is grounded through a first capacitor group comprising the ninth capacitor C9 and the tenth capacitor C10 connected in parallel, and the Vout end is grounded through a second capacitor group comprising the first capacitor C1 and the second capacitor C2 connected in parallel. More specifically, the model of the linear voltage stabilizer U4 is MD85E50QC3, but is not limited thereto.

[0038] The utility model discloses two control circuits, and the first control circuit 4 is used for the signal control of the power-on of the electric equipment, and the second control circuit is used for the control of the power-off of the electric equipment, so that the power supply equipment can be automatically closed to improve the self-control of the electric equipment in the abnormal state and improve the control efficiency in the abnormal state.

[0039] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model. For the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A power control device, characterized in that, Includes a power supply switch (2), a first control circuit (4), and a second control circuit (5). The power supply (1) is connected to the electrical circuit (3) through the power supply switch (2); The input terminal of the first control circuit (4) is connected to the power supply (1), and the output terminal is connected to the control terminal of the power supply switch. The input terminal of the second control circuit (5) is connected to the power circuit (3), and the output terminal is connected to the control terminal of the power supply switch.

2. The power control device according to claim 1, characterized in that, The power supply switch (2) includes a first electronic control switch (Q1); The input terminal of the first electronic control switch (Q1) is connected to the power supply (1), and the output terminal is connected to the power circuit (3).

3. The power control device according to claim 2, characterized in that, The output terminal of the first control circuit (4) or the second control circuit (5) is connected to the control terminal of the first electronic switch (Q1) through the seventh resistor (R7), the transistor (Q2), and the fourth resistor (R4).

4. The power control device according to claim 3, characterized in that, The power supply (1) is connected to the control terminal of the first electronic control switch (Q1) through the first resistor (R1); One end of the seventh resistor (R7) is connected to the base of the transistor (Q2) and the eighth resistor (R8). The emitter of transistor (Q2) and the eighth resistor (R8) are grounded. The collector of the transistor (Q2) is connected to the fourth resistor (R4).

5. The power control device according to claim 1, characterized in that, The first control circuit includes a programmable logic device (U3), and the control signal output terminal of the programmable logic device (U3) is connected to the control terminal of the power supply switch (2) through a ninth resistor (R9) and a diode (D5).

6. The power control device according to claim 5, characterized in that, The power input terminal of the programmable logic device (U3) is connected to the voltage regulator circuit (6); The output terminal of the voltage regulator circuit (6) is grounded through the eighth capacitor (C8); The programmable logic device (U3) includes a microprocessor.

7. The power control device according to claim 6, characterized in that, The voltage regulator circuit (6) includes a linear regulator (U4), The input power supply (VCC12) is connected to the VIN and EN terminals of the linear regulator (U4), and the Vout terminal is connected to the first control circuit (4) or the second control circuit (5).

8. The power control device according to claim 7, characterized in that, The VIN terminal of the linear regulator (U4) is grounded through the first capacitor bank, which includes a ninth capacitor (C9) and a tenth capacitor (C10) connected in parallel. The Vout terminal is grounded through a second capacitor bank, which includes a first capacitor (C1) and a second capacitor (C2) connected in parallel.

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