CN112039042B

CN112039042B - Discharge circuit and electronic device

Info

Publication number: CN112039042B
Application number: CN202010888674.5A
Authority: CN
Inventors: 黄晓东
Original assignee: Oppo Chongqing Intelligent Technology Co Ltd
Current assignee: Oppo Chongqing Intelligent Technology Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2022-09-02
Anticipated expiration: 2040-08-28
Also published as: CN112039042A

Abstract

The application provides a discharge circuit and electronic equipment, through connecting control circuit's input power, control circuit's output is connected pressure release circuit's first input, the power is connected with electronic device's input and pressure release circuit's second input, pressure release circuit and electronic device parallel connection, when mains operated, the power sends first signal of telecommunication to control circuit, form by the signal of telecommunication to first signal of telecommunication conversion through control circuit, and will cut off the signal of telecommunication and give pressure release circuit, pressure release circuit breaks off under the effect of the signal of telecommunication, stop consuming electronic device's voltage.

Description

Discharge circuit and electronic device

Technical Field

The embodiment of the application relates to the technical field of discharge circuits, in particular to a discharge circuit and electronic equipment.

Background

At present, the output voltage applied to a liquid crystal television, a conference panel and a display is higher and higher, and the rectifying and filtering capacitor of the liquid crystal television is not provided with a discharge loop when being shut down, so that the filtering capacitor can keep higher residual voltage when being shut down, and the residual voltage of the capacitor can cause certain harm to the aspects of production, maintenance and the like.

The design scheme of the relevant discharge circuit is that a discharge resistor is connected in parallel between the positive electrode and the negative electrode of the output capacitor, and the resistor can also consume power under the condition that the switching power supply is in a standby state, so that the standby power consumption of the whole system is increased due to the power consumption.

Disclosure of Invention

The embodiment of the application provides a discharge circuit, which can effectively reduce the standby power consumption of a discharge resistor.

The embodiment of this application provides a discharge circuit, its characterized in that, discharge circuit is connected with electron device, discharge circuit includes: the power supply, the control circuit and the pressure relief circuit;

the input end of the control circuit is connected with the power supply, the output end of the control circuit is connected with the first input end of the pressure relief circuit, the second input end of the pressure relief circuit is connected with the power supply, and the input end of the electronic device is connected with the power supply; the second input end of the pressure relief circuit is connected with the input end of the electronic device, and the output end of the pressure relief circuit is connected with the output end of the electronic device;

when the power supply supplies power, a first electric signal is provided for the control circuit through the power supply, a cut-off electric signal is formed through the conversion of the first electric signal by the control circuit and is transmitted to the pressure relief circuit, and the pressure relief circuit is disconnected under the action of the cut-off electric signal to stop consuming the voltage of the electronic device.

In the above scheme, when the power supply is powered off, a second electrical signal is provided to the control circuit through the power supply, the second electrical signal is converted through the control circuit to form a pressure relief electrical signal and is transmitted to the pressure relief circuit, and the pressure relief circuit is conducted under the action of the pressure relief electrical signal to start consuming the voltage of the electronic device;

and the first voltage of the cut-off electric signal is less than the second voltage of the pressure relief electric signal.

In the above solution, the power supply includes: the voltage of the first power supply is greater than that of the second power supply; the input end of the control circuit comprises: the first input end and the second input end, the second input end is connected with the first power supply, and the first input end is connected with the second power supply; the first electrical signal comprises: a first order turn-on signal and a second order saturated turn-on signal; the second electrical signal includes: a first order cutoff electrical signal and a second order cutoff electrical signal;

the second power supply is used for transmitting the first-order conducting signal to the control circuit when the first power supply and the second power supply power;

the first power supply is used for transmitting the second-order saturation conducting signal to the control circuit;

the control circuit is used for forming the cut-off electric signal according to the first-order conduction signal and the second-order saturation conduction signal and transmitting the cut-off electric signal to the pressure relief circuit; the voltage relief circuit is disconnected under the action of the cut-off electric signal, and the voltage of the electronic device is stopped being consumed;

the second power supply is further used for transmitting the first-order cutoff electrical signal to the control circuit when the first power supply and the second power supply are powered off;

the first power supply is also used for transmitting the second-order cut-off electric signal to the control circuit;

the control circuit is further used for forming a pressure relief electric signal according to the first-order cut-off electric signal and the second-order cut-off electric signal and transmitting the pressure relief electric signal to the pressure relief circuit, and the pressure relief circuit is conducted under the action of the pressure relief electric signal and starts to consume the voltage of the electronic device.

In the above scheme, the control circuit includes: the circuit comprises a first-order circuit, a second-order circuit and a voltage division circuit;

the first input end of the first-order circuit is connected with the second power supply, and the output end of the first-order circuit is grounded;

the first input end of the second-order circuit is connected with the first power supply, the first output end of the second-order circuit is grounded, and the second output end of the second-order circuit is connected with the second input end of the first-order circuit;

the input end of the voltage division circuit is connected with the first power supply, the first output end of the voltage division circuit is grounded, and the second output end of the voltage division circuit is connected with the second input end of the second-order circuit;

the first-order conducting signal acts on the first-order circuit to enable the first-order circuit to be conducted, and voltage division of the first power supply is achieved;

the second-order saturated conducting signal is subjected to voltage division through the second-order circuit to form a first voltage division signal and a second voltage division signal respectively;

the second-order saturation conduction signal is converted into a third voltage division signal through the voltage division circuit, and the second-order circuit is conducted under the action of the second voltage division signal and the third voltage division signal to obtain the cut-off electric signal and transmit the cut-off electric signal to the voltage release circuit; the voltage relief circuit is disconnected under the action of the cut-off electric signal, and the voltage of the electronic device is stopped being consumed; wherein a voltage of the third divided-voltage signal is greater than a voltage of the second divided-voltage signal;

the first-order cut-off signal acts on the first-order circuit to make the first-order circuit disconnected;

the second-order cut-off signal acts on the second-order circuit and is converted into a fourth voltage division signal and a fifth voltage division signal; under the action of the fourth voltage division signal and the fifth voltage division signal, the second-order circuit is disconnected, so that the voltage division circuit divides the voltage of the first power supply to obtain the voltage-relief electric signal and transmits the voltage-relief electric signal to the voltage-relief circuit; the voltage relief circuit is conducted under the action of the voltage relief electric signal to start to consume the voltage of the electronic device; wherein a voltage of the fourth voltage division signal is equal to a voltage of the fifth voltage division signal.

In the above scheme, the first-order circuit includes: the circuit comprises a first switch module, a first resistor and a second resistor;

the input end of the first resistor is connected with the second power supply, the output end of the first resistor is respectively connected with the first input end of the first switch module and the input end of the second resistor, and the output ends of the second resistor and the first switch module are grounded;

the second input end of the first switch module is connected with the second output end of the second-order circuit;

the first-order conducting signal is subjected to voltage division through the first resistor and the second resistor of the first-order circuit to form a first-order voltage division signal, and the first-order voltage division signal acts on a first input end of the first switch module; the first switch module is conducted under the action of the first-order voltage division signal;

the first-order cut-off electric signal is subjected to voltage division through the first resistor and the second resistor of the first-order circuit to form a first-order divided-voltage cut-off signal, the first-order divided-voltage cut-off signal acts on a first input end of the first switch module, and the first switch module is disconnected under the action of the first-order divided-voltage cut-off signal.

In the above scheme, the second-order circuit includes a second switch module, a third resistor and a fourth resistor; the input end of the third resistor is connected with the first power supply, the output end of the third resistor is respectively connected with the input end of the fourth resistor and the first output end of the second switch module, the output end of the fourth resistor is connected with the second input end of the first switch module, and the second output end of the second switch module is grounded;

the input end of the second switch module is connected with the second output end of the voltage division circuit;

the second-order saturated conducting signal is divided by the third resistor and the fourth resistor to form a first voltage division signal and a second voltage division signal respectively, the first voltage division signal acts on the second input end of the first switch module, and the second voltage division signal acts on the first output end of the second switch module; the second-order saturation conduction signal forms a third voltage division signal through the voltage division circuit, the third voltage division signal acts on the first input end of the second switch module, the second switch module is conducted under the action of the second voltage division signal and the third voltage division signal to obtain a cut-off electric signal, and the cut-off electric signal is transmitted to the first input end of the voltage release circuit; the voltage relief circuit is disconnected under the action of the cut-off electric signal, and the voltage of the electronic device is stopped being consumed;

the second order is cut off the signal process third resistance R3 and fifth resistance R5 convert, form fourth partial pressure signal and fifth partial pressure signal respectively, fourth partial pressure signal acts on the first output of second switch module, fifth partial pressure signal acts on the input of second switch module, the second switch module is in fourth partial pressure signal with the disconnection under the effect of fifth partial pressure signal.

In the above scheme, the voltage dividing circuit includes a fifth resistor and a sixth resistor;

the input end of the fifth resistor is connected with the first power supply, the output end of the fifth resistor is respectively connected with the input end of the second switch module, the input end of the sixth resistor and the first input end of the pressure relief circuit, and the output end of the sixth resistor is grounded;

when the second-order circuit is disconnected, the fifth resistor and the sixth resistor divide voltage of the first power supply, the first power supply forms the pressure relief electric signal through the fifth resistor, the pressure relief electric signal is transmitted to the first input end of the pressure relief circuit, and the pressure relief circuit is conducted under the action of the pressure relief electric signal to start consuming the voltage of the electronic device.

In the above scheme, the first switch module is an N-type triode or an N-type MOS transistor, and the second switch module is a P-type triode or a P-type MOS transistor.

In the above scheme, the resistance of the first resistor is greater than the resistance of the second resistor, the resistance of the third resistor is greater than the resistance of the fourth resistor, and the resistance of the fifth resistor is greater than the resistance of the sixth resistor.

An embodiment of the present application further provides an electronic device, including: an electronic device, and a discharge circuit as described above connected to the electronic device.

In the embodiment of the application, through connecting control circuit's input power, control circuit's output is connected pressure relief circuit's first input, the power is connected with electronic device's input and pressure relief circuit's second input, pressure relief circuit and electronic device parallel connection, when power supply, the power sends first signal of telecommunication to control circuit, form the signal of ending the signal of telecommunication to first signal of telecommunication conversion through control circuit, and will end the signal of telecommunication and give pressure relief circuit, pressure relief circuit breaks off under the effect of the signal of ending the telecommunication, stop consuming electronic device's voltage. The electronic equipment of the discharge circuit provided by the embodiment of the application can not consume the power of the power supply in the standby state, so that the power consumption is saved.

Drawings

FIG. 1 is a schematic diagram of a conventional discharge circuit;

fig. 2 is a first structural diagram of a discharge circuit according to an embodiment of the present disclosure;

fig. 3 is a second structural diagram of a discharge circuit according to an embodiment of the present disclosure;

fig. 4 is a third structural diagram of a discharge circuit provided in the embodiment of the present application;

fig. 5 is a fourth structural diagram of a discharge circuit provided in the embodiment of the present application;

fig. 6 is a fifth structural diagram of a discharge circuit according to an embodiment of the present application;

fig. 7 is a sixth structural diagram of a discharge circuit provided in an embodiment of the present application;

fig. 8 is a seventh structural diagram of a discharge circuit according to an embodiment of the present application

Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 10 is a schematic flow chart illustrating an implementation of the discharging method according to the embodiment of the present application.

Detailed Description

In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application are further described in detail with reference to the drawings and the embodiments, the described embodiments should not be considered as limiting the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

Where similar language of "first/second" appears in the specification, the following description is added, and where reference is made to the term "first \ second \ third" merely to distinguish between similar items and not to imply a particular ordering with respect to the items, it is to be understood that "first \ second \ third" may be interchanged with a particular sequence or order as permitted, to enable the embodiments of the application described herein to be performed in an order other than that illustrated or described herein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the application.

In the prior art, the output voltage applied to electronic equipment such as a liquid crystal television, a conference panel and a display is higher and higher, and a rectifying filter capacitor of the electronic equipment is not provided with a leakage loop when being shut down, so that the filter capacitor can be reserved when being shut downThe residual voltage of the capacitor causes certain damage to the aspects of production, maintenance and the like. In the prior art, a discharge resistor is connected in parallel with a rectifying and filtering capacitor of an electronic device. Fig. 1 is a schematic diagram of a conventional discharge circuit. The voltage V0 is a high voltage loaded on the filter capacitor C0, and the resistor R0 is a discharge resistor connected in parallel between the anode and the cathode of the filter capacitor C0. The resistor R0 and the filter capacitor C0 form a discharge loop, and the residual voltage on the filter capacitor C0 is consumed. In the prior art, a discharge resistor is connected in parallel between an anode and a cathode of an output capacitor, and a resistor R0 consumes power under the condition that a switching power supply of an electronic device is powered off, wherein a calculation formula of the consumed power is as follows:

the formula can be used for obtaining that the power consumption can cause the standby power consumption of the electronic equipment to be increased, and the standby power consumption is larger when the power supply time is longer, so that the electronic equipment product is difficult to meet the requirement of high-energy-efficiency authentication.

In order to solve the technical problem that the standby loss of the discharge circuit in the prior art is large in the electronic device, the embodiment of the present application provides a discharge circuit 102. Please refer to fig. 2, which is a first structural diagram of the discharge circuit 102 according to an embodiment of the present application.

In the discharge circuit 102 provided in the embodiment of the present application, the discharge circuit 102 is connected to the electronic device 101, and the discharge circuit 102 includes: power supply 10, control circuit 200 and voltage relief circuit 100.

The input end of the control circuit 200 is connected with the power supply 10, the output end of the control circuit 200 is connected with the first input end of the pressure relief circuit 100, the second input end of the pressure relief circuit 100 is connected with the power supply 10, and the input end of the electronic device 101 is connected with the power supply 10; a second input end of the voltage relief circuit 100 is connected with an input end of the electronic device 10, and an output end of the voltage relief circuit 100 is connected with an output end of the electronic device 10;

when the power supply 10 supplies power, the power supply 10 provides a first electric signal to the control circuit 200, the control circuit 200 converts the first electric signal to form a cut-off electric signal and transmits the cut-off electric signal to the voltage relief circuit 100, and the voltage relief circuit 100 is disconnected under the action of the cut-off electric signal to stop consuming the voltage of the electronic device 101.

In some embodiments of the present application, when the power supply 10 is powered off, the power supply 10 provides the second electrical signal to the control circuit 200, the control circuit 200 converts the second electrical signal to form a voltage-relief electrical signal and transmits the voltage-relief electrical signal to the voltage-relief circuit 100, and the voltage-relief circuit 100 is turned on under the action of the voltage-relief electrical signal to start consuming the voltage of the electronic device 101; the first voltage of the cut-off electric signal is smaller than the second voltage of the pressure relief electric signal.

In the embodiment of the present application, the input terminal of the control circuit 200 is connected to the power supply 10. The power supply 10 may be a commercial ac power supply or another ac or dc power supply that is transformed by a transformer.

In some embodiments of the present application, the first voltage of the cut-off electrical signal is transmitted to the voltage relief circuit 100, and since the turn-on voltage of the voltage relief circuit 100 is greater than the first voltage, the voltage on the electronic device 101 is not consumed when the voltage relief circuit 100 is turned off. In some embodiments of the present application, a first voltage of the voltage-relief electrical signal is transmitted to the voltage-relief circuit 100, and since a second voltage is greater than a turn-on voltage of the voltage-relief circuit 100, the turn-on of the voltage-relief circuit 100 starts to consume a voltage on the electronic device 101.

When the electronic device is in the off standby state, i.e. is powered off, a certain amount of residual voltage is stored in the electronic device 101 of the electronic device, and due to the higher voltage of the power supply 10, a certain amount of residual voltage still exists at the power supply 10 when the electronic device is in the off standby state. At this time, the residual voltage of the power supply 10 sends a second electrical signal to the control circuit 200, the control circuit 200 receives the second electrical signal and converts the second electrical signal into a voltage-relief signal, and the control circuit 200 sends the voltage-relief electrical signal to the first input end of the voltage-relief circuit 100. After the voltage relief circuit 100 receives the voltage relief electrical signal, the voltage relief circuit 100 is turned on under the action of the voltage relief electrical signal, so that the voltage relief circuit 100 consumes the residual voltage of the electronic device 101.

In the embodiment of the present application, the cut-off electrical signal may be a low-voltage electrical signal, which may be about 0.2V. The voltage of the voltage relief electrical signal may be greater than 0.7V. Referring to fig. 2, a voltage relief circuit 100 is shown in fig. 4. The voltage relief circuit 100 may include a voltage relief resistor R8 and a master opening block Q3. The voltage-discharging resistor R8 is used to consume the residual voltage of the electronic device 101, and the total on-die block Q3 is used to turn off or turn on the voltage-discharging circuit 100 according to the off electrical signal or the voltage-discharging electrical signal, where the total on-die block Q3 may be a triode or a MOS transistor, and the lowest on-voltage of the total on-die block Q3 may be 0.7V. The voltage relief resistor R8 is connected in series with the total die sinking block to form a voltage relief circuit 100. The voltage relief circuit 100 is connected in parallel to the electronic device 101, and after the first input end of the voltage relief circuit 100 receives the cut-off electrical signal, the master module Q3 is turned off, so that the voltage relief circuit 100 is turned off. After the first input end of the voltage relief circuit 100 receives the voltage relief electric signal, the master module Q3 is turned on, so that the voltage relief circuit 100 is turned on.

In some embodiments of the present application, a voltage regulator resistor R7, a voltage regulator diode ZD1, etc. may be further disposed at the first input terminal of the voltage-relief circuit 100. When the voltage of the cut-off electrical signal and the voltage-relief electrical signal sent by the control circuit 200 are too large, the voltage-stabilizing resistor R7 and the voltage-stabilizing diode ZD1 can effectively limit the voltage of the cut-off electrical signal and the voltage-relief electrical signal, and the function of protecting the voltage-relief circuit 100 is achieved.

According to the embodiment of the application, the pressure relief circuit 100 is connected to the electronic device 101 of the electronic equipment in parallel, the pressure relief circuit 100 is connected with the control circuit 200 and the power supply 10, when the power supply 10 supplies power, the control circuit 200 sends a cut-off electric signal to the pressure relief circuit 100 through the power supply, the pressure relief circuit 100 is disconnected, the effect of consuming power cannot be achieved, and the standby loss of the electronic equipment is reduced.

In some embodiments of the present application, based on fig. 2, the voltage-relief circuit 100 is shown in fig. 3, and includes a voltage-relief resistor R8, a total-open transistor Q3, a current-limiting resistor R7, and a zener diode ZD 1. The rectifying and filtering capacitor C3 of the electronic device is powered by the power supply 10. The input end of the pressure relief resistor R8 is connected with the power supply 10 and the input end of the rectifying and filtering capacitor C3, and the output end of the rectifying and filtering capacitor C3 is grounded. The output end of the pressure relief resistor R8 is connected with the collector of the total open triode Q3, and the emitter of the total open triode Q3 is connected with the output end of the rectifying and filtering capacitor C3. The base of the total switching triode Q3 is connected with the output end of the current-limiting resistor R7, and the input end of the current-limiting resistor R7 is connected with the first end of the zener diode ZD1 and then connected with the output end of the control circuit 200. At this time, the input end of the current-limiting resistor R7 is a first input end of the voltage-relief circuit for receiving the cut-off electrical signal or the voltage-relief electrical signal sent by the control circuit 200. The second terminal of zener diode ZD1 is connected to ground. When the voltage of the cut-off electrical signal and the voltage-relief electrical signal sent by the control circuit 200 are too large, the current-limiting resistor R7 and the zener diode ZD 1' can effectively limit the voltage of the cut-off electrical signal and the voltage-relief electrical signal, and play a role in protecting the voltage-relief circuit 100.

In some embodiments of the present application, when the power supply 10 supplies power, the control circuit 200 receives the first electrical signal of the power supply 10, converts the first electrical signal into a cut-off electrical signal, and sends the cut-off electrical signal with a voltage of 0.2V to the voltage relief circuit 100. The lowest turn-on voltage of the total on-transistor Q3 in the voltage-dropping circuit 100 is 0.7V in the embodiment of the present application. The voltage of the off signal does not reach the lowest turn-on voltage of voltage relief circuit 100 so that the collector and emitter of always-on transistor Q3 in voltage relief circuit 100 are not turned on. The voltage-relief circuit 100 connected in parallel to the rectifying-smoothing capacitor C3 is in an off state, and does not consume power from the power supply.

In some embodiments of the present application, power is removed when the power supply 10 is powered down. A certain amount of residual voltage is stored in the rectifying and filtering capacitor C3 of the electronic device, thereby affecting the service life of the electronic device. The residual voltage of the power supply 10 connected to the electronic device sends a second electrical signal to the control circuit 200, and the control circuit 200 receives the second electrical signal, converts the second electrical signal into a voltage-relief electrical signal, and sends the voltage-relief electrical signal with a voltage of 0.8V to the voltage-relief circuit 100. The lowest turn-on voltage of transistor Q3 due to total on-state in voltage bleeding circuit 100 is 0.7V. The voltage-bleeding electrical signal reaches the lowest turn-on voltage of the always-on transistor Q3, and the always-on transistor Q3 in the voltage-bleeding circuit 100 is turned on. At this time, the voltage relief circuit 100 connected in parallel to the rectifying-smoothing capacitor C3 is turned on, so that the voltage relief circuit 100 consumes the residual voltage of the rectifying-smoothing capacitor C3. The voltage-relief circuit 100 protects the rectifying and filtering capacitor C3 and prolongs the service life of the electronic equipment.

This application embodiment is through parallelly connected pressure relief circuit 100 in rectifier filter capacitor C3 one side, and pressure relief circuit 100 has included pressure relief resistance R8 and total mould opening block Q3, and wherein total mould opening block Q3 is the N type triode, sends first signal of telecommunication to control circuit 200 when power 10 supplies power, and control circuit 200 sends the signal of ending telecommunication to pressure relief circuit 100 after receiving first signal of telecommunication. The voltage relief circuit 100 is turned off without increasing the power consumption of the power supply 10. When the power supply 10 is turned off, the residual voltage of the power supply 10 sends a second electrical signal to the control circuit 200, the control circuit 200 sends a voltage relief electrical signal to the voltage relief circuit 100 after receiving the second electrical signal, the voltage relief circuit 100 is turned on, and the voltage relief resistor R8 of the voltage relief circuit 100 can consume the voltage residual on the rectifying and filtering capacitor C3.

In some embodiments of the present application, based on fig. 2, the voltage-relief circuit 100 is shown in fig. 4, and includes a voltage-relief resistor R8, an always-on N-type MOS transistor Q3, a current-limiting resistor R7, and a zener diode ZD 1. The rectifying and filtering capacitors of the electronic device are powered by a power supply 10. The input end of the pressure relief resistor R8 is connected with the input end of the rectifying and filtering capacitor C3, and the output end of the rectifying and filtering capacitor C3 is grounded. The output end of the pressure relief resistor R8 is connected with the drain electrode of the total open N-type MOS tube Q3, and the source electrode of the total open N-type MOS tube Q3 is connected with the output end of the rectifying and filtering capacitor C3. The grid of the total open N-type MOS transistor C3 is connected with the output end of the current limiting resistor R7, the input end of the current limiting resistor R7 is connected with the first end of the voltage stabilizing diode ZD1 and then connected with the output end of the control circuit 200, and the current limiting resistor R7 is used for receiving a cut-off electric signal or a pressure relief electric signal sent by the control circuit 200. The second terminal of zener diode ZD1 is connected to ground.

In this embodiment, when the power supply 10 supplies power, the control circuit 200 receives the first electrical signal of the power supply 10 and converts the first electrical signal into a cut-off electrical signal, and sends the cut-off electrical signal with a voltage of 0V to the voltage relief circuit 100, that is, the control circuit 200 does not send an electrical signal to the voltage relief circuit 100. The lowest turn-on voltage of the total open N-type MOS transistor Q3 in the voltage relief circuit 100 is 3V-5V. Therefore, the voltage of the off signal does not reach the lowest turn-on voltage of the voltage relief circuit 100, so that the source and the drain of the always-on N-type MOS transistor Q3 in the voltage relief circuit 100 are not turned on. The voltage-discharging circuit 100 connected in parallel to the rectifying-filtering capacitor C3 is in an off state, and does not consume the power of the power supply 10.

In the embodiment of the present application, when the power supply 10 is powered off. The residual voltage of the power source 10 connected to the electronic device sends a second electrical signal to the control circuit 200, and the control circuit 200 receives the second electrical signal, converts the second electrical signal into a cut-off electrical signal, and sends a voltage-relieved electrical signal with a voltage of 3V to the voltage-relieving circuit 100. The lowest turn-on voltage of the total open N-type MOS transistor Q3 in the voltage relief circuit 100 is 3V-5V. Therefore, the voltage-relief electrical signal reaches the lowest turn-on voltage of the always-on N-type MOS transistor Q3, so that the always-on N-type MOS transistor Q3 in the voltage-relief circuit 100 is turned on. At this time, the voltage relief circuit 100 connected in parallel to the rectifying-smoothing capacitor C3 is turned on, so that the voltage relief circuit 100 consumes the residual voltage of the rectifying-smoothing capacitor C3. The voltage relief circuit 100 extends the life of the electronic device.

This application embodiment is through parallelly connected pressure relief circuit 100 in rectifier filter capacitor C3 one side, and pressure relief circuit 100 has included pressure relief resistance R8 and total mould opening block Q3, and wherein total mould opening block Q3 is N type MOS pipe, and the power supply of power 10 is to sending first signal of telecommunication to control circuit 200, and control circuit 200 sends the signal of ending the signal of telecommunication to pressure relief circuit 100 after receiving first signal of telecommunication. The voltage relief circuit 100 is turned off without increasing the power consumption of the power supply 10. When the power supply 10 is turned off, the residual voltage of the power supply 10 sends a second electrical signal to the control circuit 200, the control circuit 200 sends a voltage-relief electrical signal to the voltage-relief circuit 100 after receiving the second electrical signal, the voltage-relief circuit 100 is turned on, and the voltage-relief resistor R8 of the voltage-relief circuit 100 can consume the residual voltage on the rectifying and filtering capacitor C3, so that the electronic device 101 is protected, and the service life of the electronic device is prolonged.

In some embodiments of the present application, based on fig. 2, the discharge circuit 102 is as shown in fig. 5. The discharge circuit 102 includes: a first power supply 1, a second power supply 2, a control circuit 200, a voltage-relief circuit 100 and an electronic device 101.

In some embodiments of the present application, the voltage of the first power supply 1 is greater than the voltage of the second power supply 2. The input terminals of the control circuit 200 include: the first input end and the second input end, the second input end is connected with the first power supply 1, and the first input end is connected with the second power supply 2. The first electrical signal includes: a first order turn-on signal and a second order saturated turn-on signal; the second electrical signal includes: a first order cutoff electrical signal and a second order cutoff electrical signal; the second power supply 2 is configured to transmit a first-order turn-on signal to the control circuit 200 when the first power supply 1 and the second power supply 2 supply power. The first power supply 1 is used to transmit a second-order saturation turn-on signal to the control circuit 200.

In some embodiments of the present application, the control circuit 200 is configured to form a cut-off electrical signal according to the first-order turn-on signal and the second-order saturation turn-on signal, and transmit the cut-off electrical signal to the voltage-relief circuit 100. The voltage relief circuit 100 is turned off by the cut-off electric signal to stop consuming the voltage of the electronic device 101.

In some embodiments of the present application, the second power source 2 is further configured to transmit a first-order cutoff signal to the control circuit 200 when the first power source 1 and the second power source 2 are powered off. The first power supply 1 is also used for transmitting a second-order cutoff electrical signal to the control circuit 200. The control circuit 200 is further configured to form a voltage relief electrical signal according to the first-order cut-off electrical signal and the second-order cut-off electrical signal, and transmit the voltage relief electrical signal to the voltage relief circuit 100, where the voltage relief circuit 100 is turned on under the action of the voltage relief electrical signal to start consuming the voltage of the electronic device 101.

In some embodiments of the present application, based on fig. 2, the discharge circuit 102 is as shown in fig. 6. The discharge circuit 102 includes: the circuit comprises a first power supply 1, a second power supply 2, a first-order circuit 3, a second-order circuit 4, a voltage division circuit 5, a voltage relief circuit 100 and an electronic device 101.

In some embodiments of the present application, the control circuit comprises: the circuit comprises a first-order circuit, a second-order circuit and a voltage division circuit; the first input terminal of the first-order circuit 3 is connected to the second power supply 2, and the output terminal of the first-order circuit 3 is grounded. The first input end of the second-order circuit 4 is connected with the first power supply 1, the first output end of the second-order circuit 4 is grounded, and the second output end of the second-order circuit 4 is connected with the second input end of the first-order circuit 3. The input end of the voltage division circuit 5 is connected with the first power supply 1, the first output end of the voltage division circuit 5 is grounded, and the second output end of the voltage division circuit 5 is connected with the second input end of the second-order circuit 4.

In some embodiments of the present application, the first-order conducting signal is applied to the first-order circuit 3, so that the first-order circuit 3 is conducted to implement voltage division on the first power supply 1. The second-order saturation conducting signal is divided by the second-order circuit 4 to form a first voltage division signal and a second voltage division signal respectively.

In some embodiments of the present application, the second-order saturation conducting signal is converted into a third voltage dividing signal through the voltage dividing circuit 5, and the second-order saturation conducting signal is conducted to the second-order saturation circuit 4 under the action of the second voltage dividing signal and the third voltage dividing signal, so as to obtain a cut-off electrical signal and transmit the cut-off electrical signal to the voltage relieving circuit 100. The voltage relief circuit 100 is turned off by the cut-off electric signal to stop consuming the voltage of the electronic device 101. And the voltage of the third voltage division signal is greater than that of the second voltage division signal.

In some embodiments of the present application, a first order cutoff signal is applied to the first order circuit 3, causing the first order circuit 3 to be open. The second-order cutoff signal is applied to the second-order circuit 4 and converted into a fourth voltage division signal and a fifth voltage division signal. Under the effect of fourth partial pressure signal and fifth partial pressure signal, disconnection second order circuit 4 for bleeder circuit 5 divides voltage to first power 1, obtains the pressure release signal of telecommunication and transmits to pressure release circuit 100. The voltage relief circuit 100 is turned on by the voltage relief electrical signal to start consuming the voltage of the electronic device 101. And the voltage of the fourth voltage division signal is equal to the voltage of the fifth voltage division signal.

In some embodiments of the present application, the cut-off signal may be a relatively low voltage signal, such as 0.2V. The voltage relief circuit 100 may be composed of a transistor and a voltage relief resistor connected in series. Since the minimum on voltage of the transistor is 0.7V, the voltage of the off electrical signal does not reach the on voltage of the transistor. The transistor is off, i.e., the voltage relief circuit 100 is off. The voltage on the electronic device 101 is not consumed by the voltage relief circuit 100.

In some embodiments of the present application, when the first power source 1 and the second power source 2 stop supplying power, the second power source 2 sends a first-order off electric signal to the first-order circuit 3, the first-order circuit 3 is disconnected, and the first-order circuit 3 stops dividing the voltage of the first power source 1. The residual voltage of the first power supply 1 sends a second-order cut-off electric signal to the second-order circuit 4, the second-order circuit 4 receives the second-order cut-off electric signal and converts the second-order cut-off electric signal into a fourth voltage dividing signal and a fifth voltage dividing signal, and the second-order circuit 4 is disconnected under the action of the fourth voltage dividing signal and the fifth voltage dividing signal. The residual voltage of the first power supply 1 is divided by the voltage divider circuit 5 to form a voltage-relief electrical signal, and the voltage-relief electrical signal with a proper voltage is sent to the voltage-relief circuit 100. In the embodiment of the present application, the voltage-discharging electrical signal may be a lower voltage electrical signal, such as 3V. Since the minimum on voltage of the transistor is 0.7V, the voltage of the off electric signal reaches the on voltage of the transistor. The transistor is turned on, i.e., the voltage relief circuit 100 is turned on. Voltage relief circuit 100 begins to dissipate the voltage across electronic device 101.

In some embodiments of the present application, the voltage relief circuit 100 may further include voltage regulation electronics such as a current limiting resistor R7, a zener diode ZD1, and the like. The current limiting resistor R7 and the voltage stabilizing diode ZD1 are used for receiving the cut-off electric signal or the pressure relief electric signal and limiting the cut-off electric signal or the pressure relief electric signal within a certain safety range, so that the function of protecting the pressure relief circuit 100 is achieved.

In some embodiments of the present application, based on fig. 4, the discharge circuit 102 is shown in fig. 7 and includes a first power supply 1, a second power supply 2, a first switch module Q1, a first resistor R1, a second resistor R2, a second switch module Q2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a voltage-relief resistor R8, and a total on module Q3. The voltage of the first power source 1 is greater than the voltage of the second power source 2. In the embodiment of the present application, the voltage of the first power source 1 may be 220V, and the voltage of the second power source 2 may be 12V. The first switch module Q1 and the total opening module Q3 are N-type transistors, and the second switch module Q2 is a P-type transistor.

In some embodiments of the present application, an input terminal of the first resistor R1 is connected to the second power supply 2, and an output terminal of the first resistor R1 is connected to a base of the first switch module Q1 and an input terminal of the second resistor R2, respectively. The output terminal of the second resistor R2 is connected to ground. The emitter of the first switching module Q1 is grounded. The input end of the third resistor R3 is connected with the first power supply 1, and the output end of the third resistor R3 is respectively connected with the input end of the fourth resistor R4 and the base of the second switch module Q2. The output terminal of the fourth resistor R4 is connected to the collector of the first switching module Q1. The collector of the second switching module Q2 is connected to ground. An input end of the fifth resistor R5 is connected to the first power supply 1, and an output end of the fifth resistor R5 is connected to an emitter of the second switch module Q2 and an input end of the sixth resistor R6, respectively. The output terminal of the sixth resistor R6 is connected to ground.

The input end of the pressure relief resistor R8 is connected with the first power supply 1 and the input end of the rectifying and filtering capacitor C3, and the output end of the rectifying and filtering capacitor C3 is grounded. The output end of the pressure relief resistor R8 is connected with the collector of the total die sinking block Q3, and the emitter of the total die sinking block Q3 is connected with the output end of the rectifying and filtering capacitor C3. The base of the master die sinking block Q3 is connected with the output end of the current limiting resistor R7, and the input end of the current limiting resistor R7 is connected with the first end of the voltage stabilizing diode ZD1 and then connected with the output end of the fifth resistor R5. The second terminal of zener diode ZD1 is connected to ground. The effect that the current-limiting resistor R7 and the zener diode ZD1 are connected to the output end of the fifth resistor R5 of the control circuit 200 at first is that when the voltage of the cut-off electrical signal or the voltage-relief electrical signal sent by the control circuit 200 is too large, the current-limiting resistor R7 and the zener diode ZD1 can well play a role in limiting the voltage of the cut-off electrical signal or the voltage-relief electrical signal, so that the total die sinking block Q3 and the voltage-relief resistor R8 are protected.

In the embodiment of the present application, when the first power supply 1 and the second power supply 2 supply power, the second power supply 2 sends a first-order conducting signal to the first resistor R1, where the voltage of the first-order conducting signal is 12V. The voltage of the first-order conduction signal is divided by the first resistor R1 and the second resistor R2 to form a first-order voltage division signal, and the first-order voltage division signal enters the base of the first switch module Q1. In the embodiment of the present application, the resistance of the first resistor R1 may be 10 Ω, and the resistance of the second resistor R2 may be 2 Ω. After the voltage division of the first resistor R1 and the second resistor R2, the voltage of the first-order voltage division signal entering the base of the first switch module Q1 is 2V. Since the lowest turn-on voltage of the first switch module Q1 is 0.7V in this embodiment, the first switch module Q1 is turned on. The third resistor R3 and the fourth resistor R4 form a voltage division of the second-order saturated turn-on signal transmitted from the first power supply 1. A first divided voltage signal and a second divided voltage signal are formed. The first divided voltage signal is applied to the collector of the first switching module Q1. Under the condition that the first power supply 1 supplies power normally, the first power supply 1 sends a second-order conduction signal to the fifth resistor R5, and the second-order saturation conduction signal is converted into a third voltage division signal through the fifth resistor R5, wherein the voltage of the third voltage division signal is slightly greater than that of the second voltage division signal. The base of the second switch module Q2 receives the second divided voltage signal, and the emitter of the second switch module Q2 receives the third divided voltage signal, since the second switch module Q2 is a P-type transistor. The second switch module Q2 is turned on by the second voltage division signal and the third voltage division signal, and forms a cut-off electrical signal close to 0V, and the second switch module Q2 transmits the cut-off electrical signal to the input end of the current limiting resistor R7. At this time, the input terminal of the current limiting resistor R7 is the first input terminal of the voltage relief circuit 100. The cut-off signal voltage received at the input of the current limiting resistor R7 is close to 0V. The lowest turn-on voltage of the total on-die block Q3 in the voltage relief circuit 100 is 0.7V in the embodiment of the present application. The voltage of the off signal does not reach the minimum turn-on voltage of the voltage relief circuit 100, so that the collector and emitter of the master on block Q3 in the voltage relief circuit 100 are not turned on. The voltage-relief circuit 100 connected in parallel to the rectifying-smoothing capacitor C3 is in an off state, and does not consume power from the power supply.

In the embodiment of the present application, when the first power supply 1 and the second power supply 2 are powered off. A certain amount of residual voltage is stored in the rectifying and filtering capacitor C3 of the electronic device, thereby affecting the service life of the electronic device. Since the voltage of the second power supply 2 to which the electronic device is connected is low, the voltage of the second power supply 2 drops quickly. The residual voltage of the second power supply 2 is close to 0V. The residual voltage of the second power supply 2 sends a first-order cut-off signal to the first resistor R1, and the first-order cut-off signal is formed after the first resistor R1 and the second resistor R2 divide the voltage and enters the base of the first switch module Q1. Since the first-order voltage-dividing turn-off signal has a lower voltage and cannot reach the lowest turn-on voltage of the first switch module Q1, the first switch module Q1 is not turned on. The third resistor R3 and the fourth resistor R4 do not form a voltage dividing circuit of the first power supply 1. At this time, since the voltage of the first power supply 1 is high, the voltage of the residual voltage of the first power supply 1 is also high. Since the third resistor R3 and the fifth resistor R5 are connected to the first power supply 1 at the same time, the first power supply 1 sends a second-order cut-off electrical signal to the third resistor R3 and the fifth resistor R5, and the second-order cut-off electrical signal is converted by the third resistor R3 and the fifth resistor R5 to form a fourth voltage dividing signal and a fifth voltage dividing signal, respectively. And the voltage of the fourth voltage division signal is the same as that of the fifth voltage division signal. The base of the second switch module Q2 receives the fourth voltage division signal and the emitter of the second switch module Q2 receives the fifth voltage division signal. Since the base voltage and the emitter voltage of the second switching module Q2 are the same at this time. The second switching module Q2 is open. The control circuit 200 only has the fifth resistor R5 and the sixth resistor R6 left to form a voltage division for the residual voltage of the first power supply 1. The residual voltage of the first power supply 1 forms a voltage-relief electric signal after being divided by the fifth resistor R5 and the sixth resistor R6, and enters the input end of the current-limiting resistor R7 to form a voltage-relief electric signal. After the voltage relief electric signal is subjected to current limiting through the current limiting resistor R7, the voltage is stabilized at about 3V. The pressure relief electric signal enters the base of the master opening module Q3. The lowest turn-on voltage of the master turn-on block Q3 in the voltage relief circuit 100 is 0.7V. Therefore, the voltage-relief electric signal reaches the lowest conducting voltage of the master on-die block Q3, and the master on-die block Q3 in the voltage-relief circuit 100 is conducted. At this time, the voltage relief circuit 100 connected in parallel to the rectifying and smoothing capacitor C3 is turned on, so that the voltage relief circuit 100 consumes the residual voltage of the rectifying and smoothing capacitor C3. The service life of the electronic equipment is prolonged.

According to the embodiment of the application, the pressure relief circuit 100 is connected in parallel on one side of the electronic device 101, the pressure relief circuit 100 comprises the pressure relief resistor R8 and the total die sinking block Q3, wherein the total die sinking block Q3 is an N-type triode, when the power supply of the power supply 10 is that a first-order conduction signal and a second-order saturation conduction signal are sent to the control circuit 200, and the control circuit 200 sends a cut-off electric signal to the pressure relief circuit 100 after receiving the first-order conduction signal and the first-order saturation conduction signal. The voltage relief circuit 100 is turned off without increasing the power consumption of the power supply 10. When the power supply 10 is turned off, the residual voltage of the power supply 10 sends a first-order cut-off electrical signal and a second-order cut-off electrical signal to the control circuit 200, the control circuit 200 receives the first-order cut-off electrical signal and the second-order cut-off electrical signal and then sends a voltage-relief electrical signal to the voltage-relief circuit 100, the voltage-relief circuit 100 is turned on, and the voltage-relief resistor of the voltage-relief circuit 100 can consume the residual voltage on the electronic device 101.

In some embodiments of the present application, based on fig. 4, the discharge circuit 102 is shown in fig. 8, and includes a first power supply 1, a second power supply 2, a first switch module Q1, a first resistor R1, a second resistor R2, a second switch module Q2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a voltage-relief resistor R8, and a total on module Q3. The voltage of the first power source 1 is greater than the voltage of the second power source 2. In the embodiment of the present application, the voltage of the first power source 1 may be 220V, and the voltage of the second power source 2 may be 12V. The first switch module Q1 and the total opening module Q3 are N-type MOS transistors, and the second switch module Q2 is a P-type MOS transistor.

In the embodiment of the present application, the input terminal of the first resistor R1 is connected to the second power supply 2, and the output terminal of the first resistor R1 is connected to the gate of the first switch module Q1 and the input terminal of the second resistor R2, respectively. The output terminal of the second resistor R2 is connected to ground. The source of the first switching module Q1 is connected to ground. The input end of the third resistor R3 is connected with the first power supply 1, and the output end of the third resistor R3 is respectively connected with the input end of the fourth resistor R4 and the gate of the second switch module Q2. The output terminal of the fourth resistor R4 is connected to the drain of the first switch module Q1. The drain of the second switching module Q2 is connected to ground. An input end of the fifth resistor R5 is connected to the first power supply 1, and an output end of the fifth resistor R5 is connected to a source of the second switch module Q2 and an input end of the sixth resistor R6, respectively. The output terminal of the sixth resistor R6 is connected to ground.

The input end of the voltage-relief resistor R8 is connected with the first power supply 1 and the input end of the rectifying and filtering capacitor C3, and the output end of the rectifying and filtering capacitor C3 is grounded. The output end of the pressure relief resistor R8 is connected with the drain of the total on-die block Q3, and the source of the total on-die block Q3 is connected with the output end of the rectifier filter capacitor C3. The grid of the master die sinking block Q3 is connected with the output end of the current-limiting resistor R7, and the input end of the current-limiting resistor R7 is connected with the first end of the zener diode ZD1 and then connected with the output end of the fifth resistor R5. The second terminal of zener diode ZD1 is connected to ground.

In the embodiment of the present application, when the second power source 2 sends a first-order conducting signal to the first resistor R1, the voltage of the first-order conducting signal is 12V. The voltage of the first-order conducting signal is divided by the first resistor R1 and the second resistor R2 to form a first-order voltage dividing signal, and the first-order voltage dividing signal enters the gate of the first switch module Q1. In the embodiment of the present application, the resistance of the first resistor R1 may be 8 Ω, and the resistance of the second resistor R2 may be 4 Ω. After the voltage division of the first resistor R1 and the second resistor R2, the voltage of the first-order voltage division signal entering the gate of the first switch module Q1 is 4V. Since the lowest turn-on voltage of the first switch module Q1 is 3V in this embodiment, the first switch module Q1 is turned on. The third resistor R3 and the fourth resistor R4 form a voltage division to the first power source 1. A first divided voltage signal and a second divided voltage signal are formed. The first divided voltage signal is applied to the drain of the first switching module Q1. Under the condition that the first power supply 1 normally supplies power, the first power supply 1 sends a second-order conduction signal to the fifth resistor R5, and the second-order conduction signal is converted into a third voltage division signal through the fifth resistor R5, wherein the voltage of the third voltage division signal is slightly greater than that of the second voltage division signal. The gate of the second switch module Q2 receives the second voltage dividing signal, the drain of the second switch module Q2 receives the third voltage dividing signal, the second switch module Q2 is turned on under the action of the second voltage dividing signal and the third voltage dividing signal and forms a cut-off electrical signal close to 0V, and the second switch module Q2 transmits the cut-off electrical signal to the input end of the current limiting resistor R7. At this time, the input terminal of the current limiting resistor R7 is the first input terminal of the voltage relief circuit 100. The cut-off signal voltage received at the input of the current limiting resistor R7 is close to 0V. The lowest turn-on voltage of the total open module Q3 in the voltage-relief circuit in the embodiment of the present application is 3V. Therefore, the voltage of the off signal does not reach the lowest turn-on voltage of the always-on block Q3, so the source and the drain of the always-on block Q3 in the voltage relief circuit 100 are not turned on. Therefore, the voltage relief circuit connected in parallel to the rectifying-filtering capacitor C3 is in an off state, and does not consume the power of the power supply.

In the embodiment of the present application, when the first power supply 1 and the second power supply 2 are powered off. Since the voltage of the second power supply 2 to which the electronic device is connected is low, the voltage of the second power supply 2 drops quickly. The residual voltage of the second power supply 2 is close to 0V. The residual voltage of the second power source 2 presses the first resistor R1 to send a first-order cut-off signal, which is converted into a first-order divided-voltage cut-off signal after passing through the first resistor R1 and enters the gate of the first switch module Q1. Since the first-order voltage-dividing off signal is lower than the lowest on voltage of the first switch module Q1, the first switch module Q1 is not turned on. The third resistor R3 and the fourth resistor R4 do not form a voltage dividing circuit of the first power supply 1. At this time, since the voltage of the first power supply 1 is high, the voltage of the residual voltage of the first power supply 1 is also high. Since the third resistor R3 and the fifth resistor R5 are connected to the first power supply 1 at the same time, the first power supply 1 sends a second-order cut-off electrical signal to the third resistor R3 and the fifth resistor R5, and the second-order cut-off electrical signal is converted by the third resistor R3 and the fifth resistor R5 to form a fourth voltage dividing signal and a fifth voltage dividing signal, respectively. And the voltage of the fourth voltage division signal is the same as that of the fifth voltage division signal. The gate of the second switch block Q2 receives the fourth voltage division signal and the source of the second switch block receives the fifth voltage division signal. Since the gate voltage and the source voltage of the second switching module Q2 are the same at this time. The second switching module Q2 is open. The control circuit 200 only has the fifth resistor R5 and the sixth resistor R6 left to form a voltage division for the residual voltage of the first power supply 1. The residual voltage of the first power supply 1 forms a voltage-relief electric signal after being divided by the fifth resistor R5 and the sixth resistor R6, and enters the input end of the current-limiting resistor R7 to form a voltage-relief electric signal. After the voltage relief electric signal is subjected to current limiting through the current limiting resistor R7, the voltage is stabilized at about 4V. The pressure relief electric signal enters the base of the master opening module Q3. The lowest turn-on voltage of the master turn-on block Q3 in the voltage relief circuit 100 is 3V. Therefore, the voltage-relief electric signal reaches the lowest conducting voltage of the master on-die block Q3, and the master on-die block Q3 in the voltage-relief circuit 100 is conducted. At this time, the voltage relief circuit 100 connected in parallel to the rectifying-smoothing capacitor C3 is turned on, so that the voltage relief circuit 100 consumes the residual voltage of the rectifying-smoothing capacitor C3. The service life of the electronic equipment is prolonged.

According to the embodiment of the application, the pressure relief circuit 100 is connected in parallel on one side of the electronic device 101, the pressure relief circuit 100 comprises the pressure relief resistor R8 and the total die sinking block Q3, the total die sinking block Q3 is an N-type MOS (metal oxide semiconductor) transistor, when the power supply 10 supplies power, a first-order conduction signal and a second-order saturation conduction signal are sent to the control circuit 200, and the control circuit 200 receives the first-order conduction signal and the second-order saturation conduction signal and then sends a cut-off signal to the pressure relief circuit 100. The voltage relief circuit 100 is turned off without increasing the power consumption of the power supply 10. When the power supply 10 is turned off, the residual voltage of the power supply 10 sends a first-order cut-off electrical signal and a second-order cut-off electrical signal to the control circuit 200, the control circuit 200 receives the first-order cut-off electrical signal and the second-order cut-off electrical signal and then sends a voltage-relief electrical signal to the voltage-relief circuit 100, the voltage-relief circuit 100 is turned on, and the voltage-relief resistor R8 of the voltage-relief circuit 100 can consume the voltage remaining on the electronic device 101.

Please refer to fig. 9, which is a schematic structural diagram of an electronic device 103 according to an embodiment of the present disclosure. The electronic device 103 includes the electronic device 101 and the discharge circuit 102 in the above-described embodiments. The electronic device 101 is a rectifying and smoothing capacitor in this embodiment.

When the power supply 10 is supplying power directly to the electronic device 101. The power supply sends a first electric signal to the control circuit 200 of the discharge circuit 102, the control circuit 200 receives the first electric signal, converts the first electric signal into a cut-off electric signal, and sends the cut-off electric signal to the first input end of the pressure relief circuit 100 of the discharge circuit 102, and after the pressure relief circuit 100 receives the cut-off electric signal, the pressure relief circuit 100 is disconnected, so that the pressure relief circuit 100 does not consume the voltage of the rectifying and filtering capacitor C3.

When the power supply 10 is powered off, a certain amount of residual voltage may be stored on the electronic device 101 of the electronic device 103, thereby affecting the service life of the electronic device 103. The residual voltage of the power supply connected to the electronic device 103 sends a second electrical signal to the control circuit, and the control circuit 200 receives the second electrical signal, converts the second electrical signal into a pressure relief electrical signal, and sends the pressure relief electrical signal to the first input terminal of the pressure relief circuit 100. After the voltage relief circuit 100 receives the voltage relief electrical signal, the voltage relief circuit is turned on, so that the voltage relief circuit 100 consumes the residual voltage of the rectifying and filtering capacitor C3.

Based on the foregoing embodiment, in another embodiment of the present application, fig. 10 is a schematic diagram of an implementation flow of a discharging method provided in the embodiment of the present application, and is applied to an electronic device 101 in an electronic device 103, where the electronic device 103 includes: an electronic device 101 and a discharge circuit 102, the discharge circuit 102 being connected in parallel with the electronic device 101; as shown in fig. 10, in an embodiment of the present application, the discharging method may include the steps of:

s01, determine whether the electronic device 103 is in a standby state.

In the embodiment of the present application, the electronic device 103 may be any electronic device 103, for example: a tablet Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, a vehicle-mounted device, a wearable device, a Portable Media Player (PMP), a navigation device, and other terminals. The power supply supplies power to the electronic device 101 in the electronic apparatus 103. The discharge circuit 102 connected in parallel to the electronic device 101 is used to discharge the residual voltage on the electronic device 101.

In the embodiment of the present application, the power source 10 may be a commercial ac power source or other ac or dc power source transformed by a transformer. The power supply 10 may further be connected to a control circuit 200, and the control circuit 200 is connected to the voltage-relief circuit 100. The control circuit 200 is used to control the on/off of the voltage-discharging circuit 100 according to whether the power supply is in the standby state. When the power supply 10 supplies power, S02 is executed;

s02, the discharge circuit is disconnected.

In this embodiment, the power source 10 sends the first electrical signal to the control circuit 200, the control circuit 200 receives the first electrical signal and converts the first electrical signal into the cut-off electrical signal, and sends the cut-off electrical signal to the first input terminal of the voltage relief circuit 100, and after the voltage relief circuit 100 receives the cut-off electrical signal, the voltage relief circuit 100 is turned off, so that the voltage relief circuit 100 does not consume the voltage on the electronic device 101.

When the power supply 10 supplies power, the voltage of the electronic device 101 is not consumed by controlling the voltage relief circuit 100 to be disconnected through the control circuit 200 in the discharge circuit 102.

In the embodiment of the present application, when the power is turned off, S03 is executed;

s03, the discharge circuit is conducted.

In this embodiment, the residual voltage of the power supply 10 sends a second electrical signal to the control circuit 200, and the control circuit 200 receives the second electrical signal, converts the second electrical signal into a voltage-relief electrical signal, and sends the voltage-relief electrical signal to the first input terminal of the voltage-relief circuit 100. After the voltage relief circuit 100 receives the voltage relief electrical signal, the voltage relief circuit 100 is turned on, so that the voltage relief circuit 100 consumes the residual voltage of the electronic device 101.

In the embodiment of the present application, the cut-off electrical signal may be a low-voltage electrical signal, which may be about 0.2V. The voltage of the voltage relief electrical signal may be greater than 0.7V. The voltage relief circuit at least comprises a voltage relief resistor R8 and a total opening module Q3. The voltage-discharging resistor R8 is used to consume the residual voltage of the electronic device 101, and the master on module Q3 is used to turn off or turn on the voltage-discharging circuit 100 according to the off electrical signal or the voltage-discharging electrical signal. The voltage relief resistor R8 and the always-on module Q3 are connected in series to form the voltage relief circuit 100. The pressure relief circuit is connected in parallel to the electronic device 101, and after the first input end of the pressure relief circuit 100 receives the cut-off electric signal, the master module Q3 is turned off, so that the pressure relief circuit 100 is turned off. After the first input end of the voltage relief circuit 100 receives the voltage relief electric signal, the master module Q3 is turned on, so that the voltage relief circuit 100 is turned on. The total open module Q3 may be a transistor or a MOS transistor.

When the power supply 1 is powered off, the control circuit 200 in the discharge circuit 102 controls the voltage relief circuit 100 to be turned on, and the residual voltage on the electronic device 101 starts to be consumed.

The above description is only for the embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A discharge circuit, wherein the discharge circuit is coupled to an electronic device, the discharge circuit comprising: the device comprises a power supply, a control circuit and a pressure relief circuit;

when the power supply supplies power, a first electric signal is provided for the control circuit through the power supply, the control circuit converts the first electric signal to form a cut-off electric signal and transmits the cut-off electric signal to the pressure relief circuit, and the pressure relief circuit is disconnected under the action of the cut-off electric signal to stop consuming the voltage of the electronic device;

wherein the power supply comprises: the voltage of the first power supply is greater than that of the second power supply; the input end of the control circuit comprises: the first input end and the second input end, the second input end is connected with the first power supply, and the first input end is connected with the second power supply; the first electrical signal comprises: a first order turn-on signal and a second order saturated turn-on signal;

the control circuit is used for forming the cut-off electric signal according to the first-order conduction signal and the second-order saturation conduction signal and transmitting the cut-off electric signal to the pressure relief circuit; and the voltage relief circuit is disconnected under the action of the cut-off electric signal, and the voltage of the electronic device is stopped being consumed.

2. The discharge circuit according to claim 1, wherein when the power supply is powered off, a second electrical signal is provided to the control circuit through the power supply, the second electrical signal is converted by the control circuit to form a voltage-relief electrical signal and is transmitted to the voltage-relief circuit, and the voltage-relief circuit is turned on under the action of the voltage-relief electrical signal to start consuming the voltage of the electronic device;

3. The discharge circuit of claim 2 wherein the second electrical signal comprises: a first order cutoff electrical signal and a second order cutoff electrical signal;

the control circuit is further used for forming a pressure relief electric signal according to the first-order cut-off electric signal and the second-order cut-off electric signal and transmitting the pressure relief electric signal to the pressure relief circuit, and the pressure relief circuit is conducted under the action of the pressure relief electric signal to start consuming the voltage of the electronic device.

4. The discharge circuit of claim 3, wherein the control circuit comprises: the circuit comprises a first-order circuit, a second-order circuit and a voltage division circuit;

the second-order saturation conduction signal is subjected to voltage division through the second-order circuit to form a first voltage division signal and a second voltage division signal respectively;

the second-order saturation conducting signal is converted into a third voltage division signal through the voltage division circuit, and the second-order circuit is conducted under the action of the second voltage division signal and the third voltage division signal to obtain the cut-off electric signal and transmit the cut-off electric signal to the voltage release circuit; the voltage relief circuit is disconnected under the action of the cut-off electric signal, and the voltage of the electronic device is stopped being consumed; wherein a voltage of the third divided voltage signal is greater than a voltage of the second divided voltage signal;

the second-order cut-off signal acts on the second-order circuit and is converted into a fourth voltage division signal and a fifth voltage division signal; under the action of the fourth voltage division signal and the fifth voltage division signal, the second-order circuit is disconnected, so that the voltage division circuit divides the voltage of the first power supply to obtain the voltage-relief electric signal and transmits the voltage-relief electric signal to the voltage-relief circuit; the voltage relief circuit is conducted under the action of the voltage relief electric signal to start to consume the voltage of the electronic device; wherein a voltage of the fourth divided-voltage signal is equal to a voltage of the fifth divided-voltage signal.

5. The discharge circuit of claim 4, wherein the first order circuit comprises: the circuit comprises a first switch module, a first resistor and a second resistor;

6. The discharge circuit of claim 5, wherein the second order circuit comprises a second switch module, a third resistor and a fourth resistor;

the input end of the third resistor is connected with the first power supply, the output end of the third resistor is respectively connected with the input end of the fourth resistor and the first output end of the second switch module, the output end of the fourth resistor is connected with the second input end of the first switch module, and the second output end of the second switch module is grounded;

the second-order saturation conduction signal is subjected to voltage division through the third resistor and the fourth resistor to form a first voltage division signal and a second voltage division signal respectively, the first voltage division signal acts on a second input end of the first switch module, and the second voltage division signal acts on a first output end of the second switch module; the second-order saturation conduction signal is converted into a third voltage division signal through the voltage division circuit, the third voltage division signal acts on the first input end of the second switch module, the second switch module is conducted under the action of the second voltage division signal and the third voltage division signal to obtain a cut-off electric signal, and the cut-off electric signal is transmitted to the first input end of the pressure relief circuit; the voltage relief circuit is disconnected under the action of the cut-off electric signal, and the voltage of the electronic device is stopped to be consumed;

the second order is cut off the signal warp third resistance and fifth resistance conversion form fourth partial pressure signal and fifth partial pressure signal respectively, the fourth partial pressure signal acts on the first output of second switch module, the fifth partial pressure signal acts on the input of second switch module, the second switch module is in the fourth partial pressure signal with break off under the effect of fifth partial pressure signal.

7. The discharge circuit of claim 6, wherein the voltage divider circuit comprises a fifth resistor and a sixth resistor;

8. The discharge circuit of claim 7, wherein the first switch module is an N-type transistor or an N-type MOS transistor, and the second switch module is a P-type transistor or a P-type MOS transistor.

9. The discharge circuit of claim 8, wherein the first resistor has a resistance value greater than that of the second resistor, the third resistor has a resistance value greater than that of the fourth resistor, and the fifth resistor has a resistance value greater than that of the sixth resistor.

10. An electronic device, comprising: an electronic device, and a discharge circuit according to any of claims 1-9 connected to the electronic device.