TWI551979B - Power Supplying System, Linear Controlling Module Thereof, and Controlling Method of Switching Component - Google Patents

Description

Power supply system, linear control module and control method of switching element

The present invention relates to a power supply system, and more particularly to a power supply system having low standby power consumption.

Referring to the first figure, it is a circuit diagram of a conventional switch control circuit. The switch control circuit 1 is electrically connected between the DC power source VDC and a switching element 10, and the switch control circuit 1 is used to control whether the switching element 10 is turned on or off, thereby determining whether the DC power source VDC is turned on to an electronic system PS. The electronic system PS is electrically connected to the drain of the switching element 10 through the output resistors Ro1 and Ro2, and the end points of the electronic system PS and the output resistors Ro1 and Ro2 are defined as the power output terminals Vo1 and Vo2.

The switch control circuit 1 includes a sense resistor RS, a control switch Q, a resistor R, and a capacitor C. One end of the sense resistor RS is electrically connected to the DC power source VDC and the source of the switching element 10, and the other end of the sense resistor RS is electrically connected to the drain of the control switch Q and the gate of the switching element 10. The source of the control switch Q is electrically connected to the ground, and the gate of the control switch Q is electrically connected to a control signal output terminal Sin. Resistor R is electrically connected to one end of capacitor C to control open The gate of the Q is turned off, and the other end of the resistor R and the capacitor C is electrically connected to the ground. In other words, the resistor R and the capacitor C are connected in parallel to filter out the signal output from the control signal output terminal Sin. Noise.

When the power conversion system PS is started, the control signal output terminal Sin sends a control signal to the control switch Q to drive the control switch Q to be turned on. At the same time, the switching element 10 is also turned on. In other words, when the switch control circuit 1 receives the control signal, the control switch Q and the switching element 10 are turned on almost at the same time. However, this causes the voltage of the DC power source VDC. Instant dips, as shown in the second picture.

A technical aspect of the present invention provides a linear control module electrically connected to a power supply device for supplying a DC power supply for solving an electronic system electrically connected to the power supply device. At the moment of startup, the DC power supply has a problem of dip.

In an embodiment, the present invention provides a linear control module electrically connected to a power supply device. The power supply device includes an AC/DC power conversion module, a switching component, a control signal output terminal, and a main The power output end and a standby power output end, the AC/DC power conversion module has a power output end, and the switch component is electrically connected to the power output end of the AC/DC power conversion module and the main power output end, and the standby power output end is electrically Connected to the power output of the AC/DC power conversion module. The linear control module includes a control switch, a first resistor, a capacitor and a second resistor, and the control switch is electrically connected to the a control signal output end; the first resistor is electrically connected to the control switch; the capacitor is electrically connected to the power output end of the AC/DC power conversion module and the first resistor; and the second resistor is electrically connected to the AC/DC conversion module Power output, switching element, first resistor and capacitor.

Thereby, the switching element can be turned on linearly, and the voltage value outputted from the power output terminal is suddenly dropped when the power supply device is activated at the moment when the electronic system connected thereto is activated.

In another embodiment of the technical aspect, the linear control module further includes a discharge circuit electrically connected to the power output end of the AC/DC conversion module, the control signal output end, the capacitor, the first resistor, and the second resistor. Device. The discharge circuit includes a switching component electrically connected to the power output end of the AC/DC conversion module and the signal output end, and the third resistor is electrically connected to the switching component, the first resistor, and the capacitor And a second resistor. The switching element can for example be a metal oxide semiconductor field effect transistor. The discharge circuit can provide the discharge time of the capacitor acceleration capacitor, and avoid the problem that the voltage outputted from the power output terminal suddenly drops when the electronic system repeatedly starts up in a short time.

In another embodiment of the present technology, the linear control module further includes a protection switch electrically connected to the power output end of the AC/DC conversion module, the switching component, and the capacitor; and the protection switch can be, for example, a diode. The protection open relationship allows the capacitor to be discharged when the electronic system is short-circuited. Therefore, when the short-circuit problem of the electronic system is eliminated and restarted, the voltage output from the output of the circuit does not cause a sudden drop.

Another aspect of the present disclosure is to provide a power supply system that provides power to an electronic system that can prevent a voltage output from an output of the electronic system at the moment of startup. The problem of dip.

In an embodiment, the present invention provides a power supply system electrically connected to an AC power supply and an electronic system. The power supply system includes: an AC/DC conversion module, a switching component, and a power manager. a controller, a main power output, a standby power output, and a linear control module. The AC/DC conversion module is electrically connected to the AC power supply, the AC/DC conversion module includes a power output end; the switching element is electrically connected to the power output end; the power manager is electrically connected to the electronic system and the switching element, and the power manager The utility model comprises a control signal output end; the controller is electrically connected to the power manager and the AC/DC conversion module; the main power output end is electrically connected to the switching element and the electronic system; the standby power output end is electrically connected to the power output end and the electronic system. The linear control module comprises a control switch, a first resistor, a capacitor and a second resistor, the control switch is electrically connected to the control signal output end; the first resistor is electrically connected to the control switch; the capacitor is electrically connected to the intersection/ The power output end of the DC conversion module and the first resistor; the second resistor is electrically connected to the power output end of the AC/DC conversion module, the switching element, the first resistor, and the capacitor.

Thereby, the switching element can be turned on linearly, and the voltage value outputted from the power output terminal of the power supply device can be prevented from dropping suddenly at the moment when the electronic system is started.

In other embodiments of the technical aspect, the linear control module further includes a The electrical circuit is electrically connected to the signal output end of the AC/DC conversion module, the control signal output end, the capacitor, the first resistor and the second resistor. The discharge circuit includes a switching element and a third resistor. The switching element is electrically connected to the power output end and the signal output end of the AC/DC conversion module, and the switching element can be, for example, a metal oxide semiconductor field effect transistor. The third resistor is electrically connected to the switching element, the first resistor, the capacitor, and the second resistor. The discharge circuit can provide the discharge time of the capacitor acceleration capacitor, and avoid the problem that the voltage outputted from the power output terminal suddenly drops when the electronic system repeatedly starts up in a short time.

In another embodiment of the present technology, the linear control module further includes a protection switch electrically connected to the power output end of the AC/DC conversion module, the switching component, and the capacitor; and the protection switch can be, for example, a diode. The protection open relationship allows the capacitor to be discharged when the electronic system is short-circuited. Therefore, when the short-circuit problem of the electronic system is eliminated and restarted, the voltage output from the output of the circuit does not cause a sudden drop.

In addition, the power supply system further includes an isolation unit located in the power manager and the controller, and electrically connected to the power manager and the controller. The AC/DC converter module comprises an electromagnetic interference filter, a rectifier and a DC/DC power converter, the electromagnetic interference filter is electrically connected to the AC power supply; the rectifier is electrically connected to the electromagnetic interference filter; and the DC/DC power conversion The device is electrically connected to the rectifier, and the DC/DC power converter includes a power output.

Another technical aspect of the present disclosure is to provide a method of controlling a switching element for causing a switching element to be turned on linearly.

In an embodiment, the control method of the switching element is used to make a switching element linearly conductive, and the switching element is electrically connected to the secondary side of an AC/DC conversion module. The AC/DC conversion module has a power output end, the power output end is electrically connected to a standby power output end, the switching element is electrically connected to the power output end and a main power output end, and the switching element determines whether the power outputted by the power output end is transmitted. To the main power output. The linear conduction method of the switching element comprises: providing a driving voltage; sequentially providing a plurality of pulse width modulation signals; switching the duty cycle of the pulse width modulation signal, so that the duty cycle of the pulse width modulation signal is increased from 0% to 0% 100%, wherein the pulse width modulation signal system makes the switching element linearly conductive. The duty cycle of the pulse width modulation signal is increased from 0% to 100% for 20 milliseconds.

1‧‧‧Switch Control Circuit

3‧‧‧Power supply system

5‧‧‧Power supply unit

50‧‧‧ AC/DC power conversion module

500‧‧‧electromagnetic interference filter

502‧‧‧Rectifier

503‧‧‧Power factor correction circuit

504‧‧‧Power Converter

506‧‧‧Power Manager

52‧‧‧ Controller

54‧‧‧Switching elements

56‧‧‧Power Manager

58‧‧‧Isolation unit

60‧‧‧Second isolation switch

62‧‧‧The third isolating switch

7, 7a‧‧‧ linear control module

70‧‧‧Discharge circuit

ACP‧‧‧Power supply unit

C, C1‧‧‧ capacitor

D‧‧‧Protection switch

PS‧‧‧Electronic System

Q, Q1‧‧‧ control switch

R‧‧‧Resistors

Ro1, Ro2‧‧‧ main power output resistor

Ro3‧‧‧Standby power output resistor

R1‧‧‧ first resistor

RS‧‧‧second resistor

R3‧‧‧ third resistor

VDC‧‧‧DC power supply

Vdc‧‧‧electric output

Vo1, Vo2‧‧‧ power output

V1, V2‧‧‧ main power output

Vsb‧‧‧Standby power output

The first figure shows a circuit block diagram of a conventional power supply system.

The second figure is a waveform diagram of the voltage corresponding to the DC power supply and the power output terminal of the first figure.

The third figure depicts a circuit block diagram of a power supply system of the present disclosure.

The fourth figure shows a circuit diagram of the linear control module of the first embodiment of the present disclosure.

FIG. 5 is a circuit diagram of a linear control module according to a second embodiment of the present disclosure.

The sixth figure corresponds to the waveforms of the voltages outputted from the power output terminal and the main power output terminal shown in the fourth and fifth figures.

The seventh figure shows the linear control signal of the switching element.

The above and other objects, features and advantages of the present invention will become more apparent from

Referring to the third figure, it is a circuit block diagram of the power supply system of the present disclosure. The power supply system 3 includes a power supply device 5 and a linear control module 7. The linear control module 7 is used to control the operating state of the switching element 54 of one of the power supply devices 5.

The power supply device 5 is electrically connected between an AC power supply ACP and an electronic system PS for receiving AC power output by the AC power supply ACP, and converting the AC power to the electronic system PS.

The power supply device 5 includes an AC/DC power conversion module 50, a controller 52, a switching component 54, a power manager 56, an isolation unit 58, a plurality of main power output resistors Ro1 and Ro2, and at least one main power output. The terminal has a standby power output resistor Ro3 and a standby power output terminal Vsb. In the present embodiment, the power supply device 5 includes two main power output terminals V1 and V2 as an illustrative example.

The AC/DC power conversion module 50 includes an electromagnetic interference filter 500, a rectifier 502, and a power converter 504. The electromagnetic interference filter 500 is electrically connected to the AC power supply ACP, the rectifier 502 is electrically connected to the electromagnetic interference filter 500 and the controller 52, and the power converter 504 is electrically connected to the rectifier 502 and the controller. 52. The electromagnetic interference filter 500 receives the AC power output from the AC power supply ACP and filters out the electromagnetic interference components present in the AC power. The rectifier 502 converts the AC power passing through the electromagnetic interference filter 500 and filtering out the electromagnetic interference component into DC power, and the rectifier 502 may include a power factor correction circuit 503 for reducing the amount of output current.

The power converter 504 is a DC/DC power converter 504 that receives DC power through the rectifier 502 and changes the voltage value of the power output by the power output terminal Vdc according to the control of the controller 52, such as boosting the power output. The voltage value of the power output by Vdc (boost) or the voltage value of the output of the power output terminal Vdc (buck). The power converter 504 can be, for example but not limited to, an LLC resonant power converter, a dual forward power converter, or a single forward power converter.

The switching element 54 is electrically connected to the power output terminal Vdc of the AC/DC power conversion module 50. The main power output resistors Ro1 and Ro2 are electrically connected to the switching element 54 and the main power output terminals V1 and V2, respectively, the main power output terminals V1 and V2 are electrically connected to the electronic system PS, and the standby power output resistor Ro3 is electrically connected to the AC/DC. The power output terminal Vdc of the power converter module 50 and the standby power output terminal Vsb.

In addition, it should be noted that the power supply system 3 of the present invention may not only include two main power output terminals V1 and V2. In actual implementation, the user may increase the number of main power output terminals according to actual needs, and must also increase the number of main power output terminals. correspond Increase the number of mains output resistors connected to the mains output.

In this embodiment, the voltage level of the power outputted by the standby power output terminal Vsb may be the same as the power voltage level output by the main power output terminals V1 and V2, or the voltage level of the power output by the standby power output terminal Vsb may not Same as the power voltage level of the main power output terminals V1 and V2. When the voltage level of the power outputted by the standby power output terminal Vsb is not the same as the power voltage level outputted by the main power output terminals V1 and V2, it can be between the AC/DC power conversion module 50 and the standby power output resistor Ro3. A boost circuit or a buck circuit is provided to increase or decrease the voltage level of the power outputted by the standby power supply terminal Vsb.

The power manager 56 is electrically connected to the AC/DC power conversion module 50, the electronic system PS, and the isolation unit 58. The power manager 56 includes a signal output terminal PG, a signal input terminal PS_on and a control signal output terminal Sin. The signal output terminal PG and the signal input terminal PS_on are electrically connected to the electronic system PS, respectively, and the control signal output terminal Sin is electrically connected to the linear circuit. Control module 7. The signal output terminal PG is used to transmit the signal output from the power manager 56 to the electronic system PS, and the signal input terminal PS_on is used to receive the signal from the electronic system PS.

The linear control module 7 is electrically connected to the switching element 54 and the power manager 56. The linear control module 7 receives a control signal from the control signal output terminal Sin of the power manager 56, and selectively turns off or turns on the switching element 54 according to the control signal, thereby cutting or turning on the output of the main power output terminals V1 and V2. Power to the electronic system PS.

The isolation unit 58 is electrically connected to the power manager 56 and the controller 52 for isolating the signal from the power manager 56 to the controller 52. In addition, the isolation unit 58 can also transmit the signal from the controller 52 in isolation. To the power manager 56.

In actual operation, when the switching element 54 is turned off, the DC power outputted by the power output terminal Vdc of the AC/DC power conversion module 50 cannot be transmitted to the electronic system PS through the main power output terminals V1 and V2; When the component 54 is turned on, the DC power output from the power output terminal Vdc of the AC/DC power conversion module 50 can be transmitted to the electronic system PS through the main power output terminals V1 and V2. In addition, the standby power output terminal Vsb outputs power to the electronic system PS regardless of whether the switching element 54 is turned on or off.

Referring to the fourth figure, a circuit diagram of a linear control module according to a first embodiment of the disclosure is shown. For convenience of explanation, the fourth figure simultaneously shows the switching element 54, the main power output resistors Ro1 and Ro2, the main power output terminals V1 and V2, the standby power output terminal Vsb, and the standby power output resistor Ro3. Meanwhile, the fourth figure also shows the power output terminal Vdc of the AC/DC converter module 50 and the control signal output terminal Sin of the power manager 56. In the present embodiment, the switching element 54 is exemplified by a P-type metal-oxide-semiconductor field-effect transistor (MOSFET), and the actual implementation is not limited thereto.

The linear control module 7 includes a control switch Q1, a first resistor R1, a capacitor C1 and a second resistor RS. The control switch Q1 is electrically connected to the control signal. The output terminal Sin, the first resistor R1 is electrically connected to the control switch Q1, the capacitor C1 is electrically connected to the power output terminal Vdc of the AC/DC converter module 50 and the switching element 54, and the second resistor RS is electrically connected to the capacitor C1 A resistor R1 and a switching element 54 are connected in parallel to the capacitor C1.

In this embodiment, the control switch Q1 is an N-type metal oxide semiconductor field effect transistor, and the gate of the control switch Q1 is electrically connected to the control signal output terminal Sin, and the drain of the control switch Q1 is electrically connected to the first resistor. R1, the source of the control switch Q1 is electrically connected to the ground. In actual implementation, the control switch Q1 may also be other electronic components having a switching function.

At the same time, referring to the third figure and the fourth figure, when the electronic system PS is activated, the signal input terminal PS_On of the power manager 56 receives the start signal sent by the electronic system PS. Thereafter, the control signal output terminal Sin of the power manager 56 sends a control signal to the control switch Q1 of the linear control module 7 to drive the control switch Q1 to be turned on. When the control switch Q1 is turned on and the capacitor C1 starts to be charged, the voltage value between the gate and the source of the switching element 54 rises. Next, when the control switch Q1 is turned on, the first resistor R1 and the second resistor R2 constitute a voltage dividing circuit, so that the resistance values of the first resistor R1 and the second resistor RS can be appropriately configured to control The voltage difference between the gate and the source of the switching element 54 controls the switching element 54 to be turned on, while also preventing the switching element 54 from being damaged by excessive voltage. When the switching element 54 is turned on, the main power output terminals V1 and V2 output power to the electronic system PS.

By using capacitor C1, first resistor R1 and second resistor RS, In order to make the voltage difference between the source and the gate of the switching element 54 rise gently and linearly, the switching element 54 is prevented from being turned on at the instant of starting the electronic system PS, so that the voltage value outputted by the power output terminal Vdc can be avoided. An occasional sudden dip occurs when the electronic system PS starts up.

Referring to the sixth figure, the solid line shows the voltage value corresponding to the Vdc output of the power output terminal of the third figure, and the broken line shows the voltage value corresponding to the main power output terminals V1 and V2 of the third figure. Compared with the second figure, the voltage outputted by the power output terminal Vdc shown in the sixth figure does not have an instantaneous sudden drop at the moment when the electronic system PS is started, and the stability of the power supply system 3 can be provided to avoid the power supply. System 3 malfunctions due to a sudden voltage drop. Therefore, the linear control module 7 of the present disclosure can effectively avoid the situation where the voltage value outputted by the power output terminal Vdc instantaneously drops when the electronic system PS is activated.

On the contrary, when the electronic system PS is not activated (that is, when the electronic system PS is operating in the standby state), the power manager 56 controls the signal output terminal Sin to send a control signal to the control signal input terminal Sin of the linear control module 7. The linear control module 7 receives the aforementioned control signals and drives the control switch Q1 to turn off. When the control switch Q1 is turned off, the switching element 54 is turned off, and the main power output terminals V1 and V2 have no power output; in other words, only the standby power output terminal Vsb outputs power to the electronic system PS.

Thereby, when the electronic system PS is not activated, the main power output terminals V1 and V2 do not provide power to the electronic system PS, and only the standby power output terminal Vsb supplies the power of the electronic system PS in the standby state, thus, It can effectively achieve energy saving effect.

Referring to FIG. 5, it is a circuit diagram of a linear control module according to a second embodiment of the disclosure. For convenience of explanation, the fifth diagram simultaneously shows the switching element 54, the main power output resistors Ro1 and Ro2, the main power output terminals V1 and V2, the standby power output terminal Vsb, and the standby power output resistor Ro3. Meanwhile, the fifth diagram also shows the power output terminal Vdc of the AC/DC converter module 50 and the control signal output terminal Sin of the power manager 56.

In addition, the linear control module 7a of the present embodiment is similar to the linear control module 7 of the first embodiment described above, and the same elements are denoted by the same reference numerals. The difference between the linear control module 7a of the present embodiment and the linear control module 7 of the first embodiment is that the control module 7a of the present embodiment further includes a discharge circuit 70.

The discharge circuit 70 is electrically connected to the power output terminal Vdc of the AC/DC converter module 50, the control signal output terminal Sin, the capacitor C1 and the first resistor R1, and the discharge circuit 70 serves as a discharge path of the capacitor C1.

The discharge circuit 70 includes a switching element Q2 and a third resistor R3. The switching element Q2 is electrically connected to the power output terminal Vdc of the AC/DC converter module 50, the control signal output terminal Sin and the control switch Q1, and the third resistor R3. It is electrically connected to the control switch Q1, the first resistor R1, the second resistor RS, and the capacitor C1. In the present embodiment, the switching element Q2 is a metal oxide field effect transistor, the gate of the switching element Q2 is electrically connected to the control signal output terminal Sin and the control switch Q1, and the source of the switching element Q2 is electrically connected to the AC/DC conversion. The power output terminal Vdc of the module 50 and the drain of the switching element Q2 are electrically connected to the third resistor R3.

The discharge circuit 70 provides a charge-discharge path stored in the capacitor C1 to accelerate the discharge operation of the capacitor C1. In this way, when the power supply system is restarted in a short time after the electronic system PS is turned off in a short time, the switching element 54 cannot be turned on linearly due to the capacitor C1 not being completely discharged, and the voltage output from the DC power output terminal Vdc is instantaneous. Dips.

In addition, the linear control module 7a further includes a protection switch D electrically connected to the power output terminal Vdc of the AC/DC conversion module 50, the switching element Q2, and the capacitor C1. In the present embodiment, the protection switch D is, for example but not limited to, a diode, and the anode of the protection switch D2 is electrically connected to the power output terminal Vdc, and the cathode of the protection switch D is electrically connected to the switching element Q2 and the capacitor C1. When the electronic system PS is short-circuited, the power output terminal Vdc generates a large current output, and the protection switch D2 can prevent the capacitor C1 from being effectively discharged when the electronic system PS is short-circuited and the power output terminal Vdc outputs a large current, that is, protection The switch D2 can cause the capacitor C1 to discharge through the discharge circuit 70 when the electronic system PS is short-circuited. Therefore, when the short-circuit condition of the electronic system PS is eliminated and restarted, the switching element 54 is turned on linearly to avoid the power output terminal. The voltage value of the Vdc output instantaneously drops when the electronic system PS starts.

In addition, the present invention further provides a linear conduction method of a switching element, and the linear conduction method of the switching element is applied to the circuit architecture of the linear control module shown in FIG. 4 and FIG. The linear control method is used to control a switching element electrically connected to the secondary measurement of the AC/DC conversion module, and the AC/DC conversion module has a Located on the secondary side of the power output, as shown in the third figure.

The switching element receives the power outputted by the power output terminal, and when the electronic system PS is activated, causes the main power output terminal to output the foregoing power to the electronic system PS to supply the operating power of the electronic system PS in the activated state; and in the electronic system PS When operating in the standby state, the output of the main power output output power to the electronic system PS is stopped.

The linear control method of the switching element is used to control the switching state of the switching element 54, causing the switching element 54 to be linearly opened, so that the switching element 54 operates in a safe operating area, thereby preventing the switching element 54 from being overheated and damaged. The linear control method of the switching element 54 first provides a driving voltage and provides a plurality of Pulse Width Modulation control signals to the switching element 54 in time. Switching the duty cycle of the pulse width modulation signals, so that the duty cycle of the pulse width modulation signal is increased from 0% to 100% according to the timing, as shown in the seventh figure, the driving voltage is linearly increased, thereby driving the switch Element 54 is turned on linearly. In the present embodiment, the time period during which the duty cycle of the control signal is increased from 0% to 100% is about 20 milliseconds (ms).

However, the above description is only a preferred embodiment of the present disclosure, and the scope of the disclosure of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the present invention should remain the same. The patents of the invention cover the scope of the intended protection.

54‧‧‧Switching elements

7‧‧‧Linear Control Module

C1‧‧‧ capacitor

Q1‧‧‧Control switch

R1‧‧‧ first resistor

RS‧‧‧second resistor

Ro1, Ro2‧‧‧ main power output resistor

Ro3‧‧‧Standby power output resistor

Sin‧‧‧ control signal output

Vdc‧‧‧electric output

V1, V2‧‧‧ main power supply output

Vsb‧‧‧Standby power output

Claims (11)

A linear control module is electrically connected to a power supply device, wherein the power supply device comprises an AC/DC power conversion module, a switching component, a control signal output terminal, a main power output terminal and a standby power output terminal. The AC/DC power conversion module has a power output end electrically connected to the power output end of the AC/DC power conversion module and the main power output end, and the standby power output end is electrically connected to the intersection The power output end of the DC power conversion module, the linear control module includes: a control switch electrically connected to the control signal output end; a first resistor electrically connected to the control switch; a capacitor, an electrical connection The power output end of the AC/DC power conversion module and the first resistor; and a second resistor electrically connected to the power output end of the AC/DC conversion module, the switching element, the first A resistor and the capacitor. The linear control module of claim 1, further comprising a discharge circuit electrically connected to the power output end of the AC/DC conversion module, the control signal output end, the capacitor, the first resistor, and the Second resistor. The linear control module of claim 2, wherein the discharge circuit comprises: a switching component electrically connected to the power output end of the AC/DC conversion module and the signal output end; and a third resistor And electrically connected to the switching element, the first resistor, the capacitor, and the second resistor. The linear control module of claim 3, wherein the switching element is a metal oxide semiconductor field effect transistor. The linear control module of claim 4 further includes a protection switch electrically connected to the power output end of the AC/DC conversion module, the switching element, and the capacitor. The linear control module of claim 5, wherein the protection switch is a diode. A power supply system having a linear control module of any one of claims 1 to 6, electrically connected to an AC power supply and an electronic system, the power supply system comprising: an AC/DC conversion module electrically connected The AC power supply, the AC/DC converter module includes a power output terminal; a switching component electrically connected to the power output terminal; a power manager electrically connected to the electronic system and the switching component, the power management The device includes a control signal output terminal; a controller electrically connected to the power manager and the AC/DC conversion module; a main power output terminal electrically connected to the switching component and the electronic system; and a standby power output The terminal is electrically connected to the power output terminal and the electronic system. The power supply system of claim 7, further comprising an isolation unit located in the power manager and the controller, and electrically connected to the power manager and the controller. The power supply system of claim 8, wherein the AC/DC conversion module comprises: an electromagnetic interference filter electrically connected to the AC power supply; a rectifier electrically connected to the electromagnetic interference filter; A DC/DC power converter is electrically coupled to the rectifier, the DC/DC power converter including the power output. A switching element control method for linearly conducting a switching element electrically connected to a secondary side of an AC/DC conversion module, the AC/DC conversion module having a power output end, the power The output end is electrically connected to a standby power output end, the switching element is electrically connected to the power output end and a main power output end, and the switching element determines whether the power outputted by the power output end is transmitted to the main power output end, the switching element The linear conduction method comprises: providing a driving voltage; sequentially providing a plurality of pulse width modulation signals; and switching a duty cycle of the pulse width modulation signals, so that the duty cycle of the pulse width modulation signals is 0 by time series % is increased to 100%, wherein the pulse width modulation signals are such that the switching element is in linear conduction. The control method of the switching element according to claim 10, wherein the duty cycle of the pulse width modulation signal is increased from 0% to 100% for 20 milliseconds.