TWI601369B - Adapter with low standby loss and electronic system with low standby loss - Google Patents

Description

Adapter with low standby loss and electronic system with low standby loss

The present invention relates to an adapter and an electronic system, and more particularly to an adapter having low standby loss and an electronic system having low standby loss.

An adapter is a common electronic device; usually, an adapter is used to receive and convert an AC power source into a DC power source, and output a DC power source to a load device at the back end to drive the load device, so the adapter is very important in the electronic field. .

In general, when the adapter is not connected to the load device, the adapter stops switching and outputs power and enters standby mode. In standby mode, in order to allow the adapter to enter the working state faster, the internal circuit of the adapter still has standby loss, which will cause waste of energy. In addition, when the adapter is reconnected to the load device, the adapter must be able to automatically and automatically reset the auto re-start to supply power to the load device at the back end.

However, the current disadvantage of the adapter is that the standby loss is too high and the energy is wasted, and the automatic reset start of the adapter when the adapter is reconnected is often not fast enough and accurate, which is an extremely problem to be solved.

In order to improve the above disadvantages of the prior art, it is an object of the present invention to provide an adapter having low standby loss.

In order to improve the above disadvantages of the prior art, it is still another object of the present invention to provide an electronic system having low standby loss.

In order to achieve the above object of the present invention, an adapter with low standby loss of the present invention is used for supplying power to a load device. The adapter includes: a rectifying unit; a power factor correcting unit electrically connecting the rectifying unit and sending a first voltage a standby circuit electrically connected to the power factor correction unit for converting the first voltage into a second voltage and a third voltage; a load plug detection circuit electrically connecting the standby circuit and receiving the second a first power conversion circuit electrically connected to the power factor correction unit has a first output end and a first ground end, the first ground end is electrically connected to the load plug detection circuit; and a second power conversion The circuit is electrically connected to the power factor correcting unit, and has a second output end and a second ground end, wherein the second ground end is electrically connected to the load plug detecting circuit, and the first ground end and the second ground end Connected to different grounding; and an auxiliary voltage control circuit electrically connecting the standby circuit, the first power conversion circuit and the second power conversion circuit, and receiving the third Pressure. Wherein, when the load device is not connected to the adapter, the voltage of the first ground end and the second ground end is different, so that the load plug detecting circuit does not send a first signal; the auxiliary voltage control circuit does not receive the first a signal, the auxiliary voltage control circuit does not drive the first power conversion circuit and the second power conversion circuit, so the first power conversion circuit and the second power conversion circuit do not convert the first voltage into a first output Voltage and a second output voltage. When the load device is connected to the adapter, the first ground end and the second ground end form a short circuit, so that the load plug detection circuit is turned on and sends out the first signal, and the auxiliary voltage control circuit receives the first After the signal is turned on, and a fourth voltage is sent to drive the first power conversion circuit and the second power conversion circuit, so that the first power conversion circuit and the second power conversion circuit start to convert the first voltage into the first An output voltage and the second output voltage.

In order to achieve the above-described still further object of the present invention, an electronic system having low standby loss of the present invention includes the adapter and a load device as described above. Wherein, when the load device is connected to the adapter, the first ground end forms a short circuit with the second ground end, so that the adapter outputs a voltage to the load device.

The effect of the invention is that when the load device is not connected to the adapter, because the voltages of the ground terminals of different power conversion circuits are different, the power conversion circuit can be driven without being operated without energy consumption, thereby making the standby loss of the adapter extremely low; On the other hand, when the load device is connected to the adapter, the ground terminals of different power conversion circuits form a short circuit, so that the voltages of the ground terminals are the same, so that the power conversion circuit can be driven to supply power to the load device, thereby enabling the automatic adapter The reset is quick and accurate.

10‧‧‧Adapter with low standby loss

20‧‧‧Load plug detection circuit

30‧‧‧First power conversion circuit

40‧‧‧Second power conversion circuit

50‧‧‧Auxiliary voltage control circuit

60‧‧‧ load device

70‧‧‧First connector

80‧‧‧Standby circuit

90‧‧‧Second connector

100‧‧‧current balancing unit

110‧‧‧Rectifier unit

120‧‧‧Power Factor Correction Unit

130‧‧‧Short circuit

202‧‧‧First transistor switch

204‧‧‧First resistance

206‧‧‧second resistance

208‧‧‧third resistor

210‧‧‧first capacitor

212‧‧‧fourth resistor

214‧‧‧Optocoupler transmitter

216‧‧‧Second transistor switch

302‧‧‧First ground

304‧‧‧ first converter

306‧‧‧ first output

308‧‧‧First Diode Circuit

310‧‧‧First output capacitor

402‧‧‧Second ground

404‧‧‧Second converter

406‧‧‧second output

408‧‧‧Second diode circuit

410‧‧‧Second output capacitor

504‧‧‧Optocoupler Receiver

506‧‧‧Auxiliary voltage terminal transistor switch

508‧‧‧Zina diode

510‧‧‧Auxiliary voltage terminal resistance

702‧‧‧Flexible components

704‧‧‧Short-circuit components

902‧‧‧Power input

904‧‧‧ Grounding terminal

906‧‧‧First leading end

908‧‧‧Second guiding end

HV‧‧‧first voltage

VSTB‧‧‧second voltage

VAUX‧‧‧ third voltage

VDD‧‧‧fourth voltage

Vout1‧‧‧ first output voltage

Vout2‧‧‧second output voltage

L‧‧‧FireWire

N‧‧‧Neutral

LLC1‧‧‧First resonant converter circuit

LLC2‧‧‧Second resonant converter circuit

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram of one embodiment of an adapter having low standby loss in accordance with the present invention.

2 is a circuit diagram of a first embodiment in which a first ground terminal and a second ground terminal are short-circuited according to the present invention.

3 is a circuit diagram showing a second embodiment in which a first ground terminal and a second ground terminal are short-circuited according to the present invention.

4 is a circuit diagram of a third embodiment in which a first ground terminal and a second ground terminal are short-circuited according to the present invention.

FIG. 5 is a circuit diagram of a specific embodiment of a load plug detection circuit of the present invention.

6 is a circuit diagram of a specific embodiment of an auxiliary voltage control circuit, a first power conversion circuit, and a second power conversion circuit of the present invention.

The detailed description and the technical description of the present invention are to be understood as the

Please refer to FIG. 1, which is a block diagram of one embodiment of an adapter with low standby loss according to the present invention. An adapter 10 having low standby loss is used to supply power to a load device 60. The adapter 10 having low standby loss includes a rectifying unit 110, a power factor correcting unit 120, a standby circuit 80, and a load plug detecting circuit. 20, a first power conversion circuit 30, a second power conversion circuit 40, an auxiliary voltage control circuit 50 and a current balancing unit 100; the first power conversion circuit 30 has a first output 306 and a first ground The second power conversion circuit 40 has a second output end 406 and a second ground end 402.

The rectifying unit 110 is electrically connected to a live line L and a neutral line N; the power factor correcting unit 120 is electrically connected to the rectifying unit 110; the standby circuit 80 is electrically connected to the power factor correcting unit 120; the load plug detecting circuit 20 Electrically connecting the standby circuit 80; the first power conversion circuit 30 is electrically connected to the power factor correction unit 120; the first ground terminal 302 is electrically connected to the load plug detection circuit 20; the second power conversion circuit 40 is electrically connected to the The power factor correction unit 120 is electrically connected to the load plug detection circuit 20; the auxiliary voltage control circuit 50 is electrically connected to the standby circuit 80, the first power conversion circuit 30, and the second power conversion circuit. The current balancing unit 100 is electrically connected to the first power conversion circuit 30, the first output terminal 306, the second power conversion circuit 40, and the second output terminal 406.

The power factor correction unit 120 sends a first voltage HV to the standby circuit 80, the first power conversion circuit 30, and the second power conversion circuit 40. The standby circuit 80 is configured to convert the first voltage HV into a first a second voltage VSTB and a third voltage VAUX; the standby circuit 80 transmits the second voltage VSTB to the load plug detecting circuit 20; the standby circuit 80 transmits the third voltage VAUX to the The auxiliary voltage control circuit 50; the load plug detecting circuit 20 receives the second voltage VSTB; the auxiliary voltage control circuit 50 receives the third voltage VAUX.

First, one of the technical features of the present invention is that the first ground terminal 302 and the second ground terminal 402 are connected to different grounds by a printed circuit board wiring and fabrication technique, so that the voltage of the first ground terminal 302 is Not equal to the voltage of the second grounding terminal 402; only when the load device 60 is connected to the adapter 10 having low standby loss, the first grounding terminal 302 and the second grounding terminal 402 form a short circuit, so that the first grounding The voltage at terminal 302 is equal to the voltage at the second ground terminal 402. Details are as follows: When the load device 60 is not connected to the adapter 10 having low standby loss, the voltage of the first ground terminal 302 is not equal to the voltage of the second ground terminal 402, so that the load plug detection circuit 20 does not send a first a signal (described in detail later); the auxiliary voltage control circuit 50 does not receive the first signal, so that the auxiliary voltage control circuit 50 does not drive the first power conversion circuit 30 and the second power conversion circuit 40, so the first A power conversion circuit 30 and the second power conversion circuit 40 do not convert the first voltage HV into a first output voltage Vout1 and a second output voltage Vout2.

When the load device is not connected to the adapter, because the voltage of the ground of the different power conversion circuits is different, the power conversion circuit can be driven without being operated without energy consumption, thereby reducing the standby loss of the adapter (which can be less than 0.5 watts).

When the load device 60 is connected to the adapter 10 having low standby loss, the first ground terminal 302 forms a short circuit with the second ground terminal 402 (ie, the voltage of the first ground terminal 302 is equal to the second ground terminal 402). The voltage is applied to enable the load plug detection circuit 20 to turn on and send the first signal (described in detail later); the auxiliary voltage control circuit 50 is turned on after receiving the first signal, and sends a fourth voltage VDD to drive The first power conversion circuit 30 and the second power conversion circuit 40 cause the first power conversion circuit 30 and the second power conversion circuit 40 to start converting the first voltage HV into the first output voltage Vout1 and the first The two output voltages Vout2 are transmitted to the load device 60.

When the load device is connected to the adapter, the ground terminal of the different power conversion circuit forms a short circuit, so that the power conversion circuit can be driven to supply power to the load device, thereby enabling the automatic reset of the adapter to be started quickly and accurately.

The current balancing unit 100 detects the current value of the first output terminal 306 and the second output terminal 406, and sends a second signal to the first power conversion circuit 30 and the second power conversion circuit 40.

In another embodiment of the present invention, an electronic system having low standby loss may include the aforementioned adapter 10 having low standby loss plus the aforementioned load device 60; when the load device 60 is not connected to the adapter 10, the first The voltage of the ground terminal 302 and the second ground terminal 402 are different, so that the adapter 10 does not output a voltage to the load device 60; when the load device 60 is connected to the adapter 10, the first ground terminal 302 and the second ground Terminal 402 forms a short circuit such that adapter 10 outputs a voltage to the load device 60.

Please refer to FIG. 5 , which is a circuit diagram of a specific embodiment of the load plug detection circuit of the present invention. The adapter 10 having a low standby loss further includes a first connector 70. The load plug detection circuit 20 includes a first transistor switch 202, an optocoupler transmitting end 214, and a second transistor switch 216. A first resistor 204, a second resistor 206, a third resistor 208, a first capacitor 210 and a fourth resistor 212.

The first transistor switch 202 is electrically connected to the first power conversion circuit 30, the first resistor 204, the second resistor 206, the third resistor 208, the first capacitor 210, the first connector 70, and the a second transistor switch 216; the optocoupler transmitting end 214 is electrically connected to the second transistor switch 216 and the fourth resistor 212; the standby circuit 80 is electrically connected to the first resistor 204, the third resistor 208, and The fourth resistor 212 is electrically connected to the second resistor 206, the first capacitor 210, the first transistor switch 202, the second transistor switch 216, and the first connector 70. .

Furthermore, please refer to FIG. 1 at the same time; when the load device 60 is not connected to the adapter 10 with low standby loss, the first ground terminal 302 and the second ground terminal 402 are connected to different connections. Therefore, the voltages of the first grounding terminal 302 and the second grounding terminal 402 are different, so that the first transistor switch 202 is turned on, so that the second transistor switch 216 is not turned on, and then the optical coupler is sent. The terminal 214 is not turned on, and the optical coupler transmitting end 214 does not send the first signal (described in detail later).

When the load device 60 is connected to the adapter 10 having low standby loss, the first ground terminal 302 and the second ground terminal 402 form a short circuit, so that the voltages of the first ground terminal 302 and the second ground terminal 402 are the same. The first transistor switch 202 is not turned on, so that the second voltage VSTB turns on the second transistor switch 216 and then turns on the photocoupler transmitting end 214 (ie, the second voltage VSTB makes the second transistor The switch 216 and the optocoupler transmitting end 214 are turned on, and the optocoupler transmitting end 214 sends the first signal (described in detail later).

Please refer to FIG. 6, which is a circuit diagram of a specific embodiment of the auxiliary voltage control circuit, the first power conversion circuit, and the second power conversion circuit of the present invention.

The auxiliary voltage control circuit 50 includes an optocoupler receiving end 504, an auxiliary voltage terminal transistor switch 506, a Zener diode 508 and an auxiliary voltage terminal resistor 510. The auxiliary voltage terminal transistor switch 506 is electrically connected to the standby circuit 80, the optocoupler receiving end 504, the auxiliary voltage terminal resistor 510, the Zener diode 508, the first power conversion circuit 30, and the second Power conversion circuit 40.

As described above, when the load device 60 is not connected to the adapter 10 having low standby loss, the voltage of the first ground terminal 302 and the second ground terminal 402 are different, and the optical coupler transmitting end 214 does not send the The first signal. At this time, the optocoupler receiving end 504 does not receive the first signal and is not turned on, so that the auxiliary voltage terminal transistor switch 506 is not turned on, and the auxiliary voltage terminal transistor switch 506 does not send the fourth voltage VDD. That is, the auxiliary voltage control circuit 50 does not drive the first power conversion circuit 30 and the second power conversion circuit 40, so the first power conversion circuit 30 and the second power conversion circuit 40 do not use the first voltage HV. The signal is converted into a first output voltage Vout1 and a second output voltage Vout2.

When the load device is not connected to the adapter, because the voltage of the ground of the different power conversion circuits is different, the power conversion circuit can be driven without being operated without energy consumption, thereby reducing the standby loss of the adapter (which can be less than 0.5 watts).

When the load device 60 is connected to the adapter 10 having low standby loss, the first ground terminal 302 forms a short circuit with the second ground terminal 402, and the optical coupler transmitting end 214 sends the first signal. The optocoupler receiving end 504 is turned on after receiving the first signal, so that the third voltage VAUX is turned on by the auxiliary voltage terminal transistor switch 506, and the auxiliary voltage terminal transistor switch 506 sends the fourth voltage VDD. That is, the auxiliary voltage control circuit 50 sends the fourth voltage VDD to drive the first power conversion circuit 30 and the second power conversion circuit 40, so that the first power conversion circuit 30 and the second power conversion circuit 40 start. The first voltage HV is converted into the first output voltage Vout1 and the second output voltage Vout2 for transmission to the load device 60. After the auxiliary voltage terminal transistor switch 506 is turned on, the third voltage VAUX is clamped by the electrical characteristics of the Zener diode 508 to form and provide the fourth voltage VDD.

When the load device is connected to the adapter, the ground terminal of the different power conversion circuit forms a short circuit, so that the power conversion circuit can be driven to supply power to the load device, thereby enabling the automatic reset of the adapter to be started quickly and accurately.

The first power conversion circuit 30 includes a first converter 304, a first diode circuit 308 and a first output capacitor 310. The first converter 304 includes a first resonant converter circuit LLC1. The first converter 304 is electrically connected to the power factor correction unit 120 and the auxiliary voltage control circuit 50; the first diode circuit 308 is electrically connected to the first converter 304; the first output capacitor 310 is electrically The first diode circuit 308, the first converter 304, the first ground terminal 302, and the load plug detection circuit 20 are connected. When the first converter 304 receives the fourth voltage VDD, the first converter 304 begins to convert the first voltage HV into the first output voltage Vout1 and outputs the first output voltage Vout1 to the first output terminal 306.

The second power conversion circuit 40 includes a second converter 404, a second diode circuit 408 and a second output capacitor 410. The second converter 404 includes a second resonant converter circuit LLC2. The second converter 404 is electrically connected to the power factor correction unit 120 and the auxiliary voltage control circuit 50; the second diode circuit 408 is electrically connected to the second converter 404; the second output capacitor 410 is electrically The second diode circuit 408, the second converter 404, the second ground terminal 402, and the load plug detection circuit 20 are connected. When the second converter 404 receives the fourth voltage VDD, the second converter 404 begins to convert the first voltage HV into the second output voltage Vout2 and outputs the second output voltage 406 to the second output terminal 406.

Please refer to FIG. 2, which is a circuit diagram of a first embodiment in which a first ground terminal and a second ground terminal of the present invention are short-circuited. The adapter 10 with low standby loss further includes the first connector 70; the first connector 70 is electrically connected to the first output terminal 306, the first ground terminal 302, the second output terminal 406, and the second ground. End 402. The load device 60 includes a second connector 90. The second connector 90 has a power input end 902, a ground end 904, a first lead end 906, and a second lead end 908. The terminal 906 is connected in parallel with the power input terminal 902; the second conductive terminal 908 is connected in parallel with the ground terminal 904. When the first connector 70 is connected to the second connector 90, the first output end 306 is connected to the power input end 902, and the second output end 406 is connected to the first conductive end 906. The first ground end 302 is connected. The grounding end 904 is connected, and the second grounding end 402 is connected to the second guiding end 908. Thereby, the first ground terminal 302 and the second ground terminal 402 are short-circuited.

Please refer to FIG. 3, which is a circuit diagram of a second embodiment in which a first ground terminal and a second ground terminal of the present invention are short-circuited. The adapter 10 with low standby loss further includes the first connector 70, a shorting component 704 and an elastic component 702; the first connector 70 is electrically connected to the first output terminal 306, the first grounding terminal 302, the The second output end 406 and the second ground end 402; the elastic element 702 is connected to the first connector 70 and the short-circuiting element 704 such that the short-circuiting element 704 is kept at a distance from the first connector 70. The load device 60 includes a second connector 90; the second connector 90 has an electric The force input terminal 902 and a first conductive terminal 906; the first conductive terminal 906 is connected in parallel with the power input terminal 902. When the first connector 70 is connected to the second connector 90, the second connector 90 pushes the shorting member 704 to compress the elastic member 702 such that the first grounding end 302 and the second grounding end 402 are A short circuit is formed through the shorting element 704.

As shown in FIG. 3, the first output end 306 is connected to a portion of the first connector 70, the second output end 406 is connected to a portion of the first connector 70, the power input end 902, and the first A guiding end 906 is located at the same horizontal line, and the first grounding end 302 is connected to a portion of the first connector 70, the second grounding end 402 is connected to a portion of the first connector 70, the elastic element The 702 and the shorting component 704 are located at another horizontal line such that when the first connector 70 is connected to the second connector 90, the first output 306 passes through the power input 902 and the first conductive end 906. Connecting to the second output terminal 406, the second connector 90 pushes the shorting element 704 to compress the elastic element 702, so that the first grounding end 302 and the second grounding end 402 form a short circuit through the shorting element 704. (ie, the first ground terminal 302 is coupled to the second ground terminal 402 through the shorting element 704).

Please refer to FIG. 4, which is a circuit diagram of a third embodiment in which the first ground terminal and the second ground terminal of the present invention are short-circuited. The load device 60 includes a short circuit 130. When the load device 60 is connected to the adapter 10, the first ground terminal 302 and the second ground terminal 402 form a short circuit through the short circuit 130.

The effect of the invention is that when the load device is not connected to the adapter, the voltage of the ground of the different power conversion circuits is different, the power conversion circuit can be driven without being operated without energy consumption, whereby the standby loss of the adapter is extremely low; When the load device is connected to the adapter, the ground terminals of the different power conversion circuits form a short circuit, so that the voltages of the ground terminals are the same, so that the power conversion circuit can be driven to supply power to the load device, thereby enabling the automatic reset of the adapter to be started quickly. And accurate.

However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the equal changes and modifications made by the scope of the present invention should remain The patents of the invention cover the scope of the intended protection. The invention may be embodied in various other modifications and changes without departing from the spirit and scope of the inventions. It is intended to fall within the scope of the appended claims. In summary, it is known that the present invention has industrial applicability, novelty and advancement, and the structure of the present invention has not been seen in similar products and public use, and fully complies with the requirements of the invention patent application, and is filed according to the patent law.

10‧‧‧Adapter with low standby loss

20‧‧‧Load plug detection circuit

30‧‧‧First power conversion circuit

40‧‧‧Second power conversion circuit

50‧‧‧Auxiliary voltage control circuit

60‧‧‧ load device

80‧‧‧Standby circuit

100‧‧‧current balancing unit

110‧‧‧Rectifier unit

120‧‧‧Power Factor Correction Unit

302‧‧‧First ground

306‧‧‧ first output

402‧‧‧Second ground

406‧‧‧second output

HV‧‧‧first voltage

VSTB‧‧‧second voltage

VAUX‧‧‧ third voltage

VDD‧‧‧fourth voltage

Vout1‧‧‧ first output voltage

Vout2‧‧‧second output voltage

L‧‧‧FireWire

N‧‧‧Neutral

Claims (12)

An adapter with low standby loss for supplying power to a load device, the adapter comprising: a rectifying unit; a power factor correcting unit electrically connecting the rectifying unit and sending a first voltage; and a standby circuit electrically connecting the power a factor correction unit configured to convert the first voltage into a second voltage and a third voltage; a load plug detection circuit electrically connecting the standby circuit and receiving the second voltage; a first power conversion circuit, Electrically connecting the power factor correction unit, having a first output end and a first ground end, the first ground end is electrically connected to the load plug detection circuit; a second power conversion circuit electrically connecting the power factor correction unit Having a second output end and a second ground end, the second ground end is electrically connected to the load plug detecting circuit, and the first ground end and the second ground end are connected to different grounds; and an auxiliary a voltage control circuit electrically connecting the standby circuit, the first power conversion circuit and the second power conversion circuit, and receiving the third voltage; wherein, when the load device is not When the adapter is connected, the voltage of the first ground end and the second ground end are different, so that the load plug detecting circuit does not send a first signal; the auxiliary voltage control circuit does not receive the first signal, so that the auxiliary The voltage control circuit does not drive the first power conversion circuit and the second power conversion circuit, so the first power conversion circuit and the second power conversion circuit do not convert the first voltage into a first output voltage and a second output a voltage; wherein, when the load device is connected to the adapter, the first ground end and the second ground end form a short circuit, so that the load plug detecting circuit is turned on and sends out the first signal, and the auxiliary voltage control circuit receives The first signal is turned on, and a fourth voltage is sent to drive the first power conversion circuit and The second power conversion circuit causes the first power conversion circuit and the second power conversion circuit to start converting the first voltage into the first output voltage and the second output voltage. The adapter of claim 1 , wherein the load plug detection circuit comprises: a first transistor switch electrically connected to the standby circuit, the first ground, and the second a grounding end; an optocoupler transmitting end electrically connected to the standby circuit and the first transistor switch; and a second transistor switch electrically connected to the optocoupler transmitting end, the standby circuit, and the first electric circuit a crystal switch and the second ground end; wherein, when the load device is connected to the adapter, the first ground end and the second ground end form a short circuit, so that the first transistor switch is not conducting, and the second voltage is turned on After the second transistor switch, the optical coupler transmitting end is turned on, and the optical coupler transmitting end sends the first signal. An adapter having a low standby loss as described in claim 2, wherein the load plug detection circuit further includes: a first resistor electrically connected to the standby circuit, the first transistor switch, and the first a second resistor electrically connected to the first transistor switch, the first ground terminal, the first resistor, the second ground terminal, and the second transistor switch; and a third resistor electrically connected The standby circuit, the first resistor, the first transistor switch and the second transistor switch; a first capacitor electrically connected to the first transistor switch, the first ground terminal, the first resistor, the a second grounding terminal, the second resistor and the second transistor switch; and a fourth resistor electrically connected to the standby circuit, the first resistor, the third resistor, and the optical coupler transmitting end. An adapter having low standby loss as described in claim 2, wherein the auxiliary voltage control circuit comprises: An optocoupler receiving end electrically connected to the standby circuit; and an auxiliary voltage end transistor switch electrically connected to the standby circuit, the optocoupler receiving end, the first power conversion circuit and the second power conversion circuit The optocoupler receiving end receives the first signal and is turned on, so that the third voltage turns on the auxiliary voltage terminal transistor switch, and the auxiliary voltage terminal transistor switch sends the fourth voltage. An adapter having a low standby loss according to claim 4, wherein the auxiliary voltage control circuit further includes: a Zener diode electrically connected to the auxiliary voltage terminal transistor switch, the first power conversion circuit, and The second power conversion circuit and an auxiliary voltage terminal resistor are electrically connected to the optocoupler receiving end, the auxiliary voltage end transistor switch and the Zener diode. An adapter having a low standby loss according to claim 1, wherein the first power conversion circuit includes: a first converter electrically connected to the power factor correction unit and the auxiliary voltage control circuit; a diode circuit electrically connected to the first converter; and a first output terminal capacitor electrically connected to the first diode circuit, the first converter, the first ground end, and the load plugging The measuring circuit; wherein, when the first converter receives the fourth voltage, the first converter begins to convert the first voltage into the first output voltage, and outputs the first output voltage to the first output terminal. An adapter having a low standby loss according to claim 1, wherein the second power conversion circuit comprises: a second converter electrically connected to the power factor correction unit and the auxiliary voltage control circuit; a diode circuit electrically connected to the second converter; and a second output capacitor electrically connected to the second diode circuit, the second converter, the second ground, and the load plug detection circuit; wherein, when the second converter receives the first At four voltages, the second converter begins to convert the first voltage to the second output voltage and outputs to the second output. The adapter with low standby loss as described in claim 1 further includes: a current balancing unit electrically connecting the first power conversion circuit, the first output terminal, the second power conversion circuit, and the second An output terminal; wherein the current balancing unit detects a current value of the first output end and the second output end, and sends a second signal to the first power conversion circuit and the second power conversion circuit. An electronic system having a low standby loss, comprising: an adapter according to any one of claims 1 to 8; and a load device; wherein the first ground is when the load device is connected to the adapter The terminal forms a short circuit with the second ground terminal such that the adapter outputs a voltage to the load device. An electronic system with low standby loss as described in claim 9 wherein the adapter further comprises: a first connector electrically connected to the first output terminal, the first ground terminal, the second output terminal, and The second grounding end; wherein the load device comprises: a second connector having a power input end, a grounding end, a first guiding end, and a second guiding end, wherein the first guiding end is The power input end is connected in parallel, and the second conductive end is connected in parallel with the ground end; wherein, when the first connector is connected to the second connector, the first output end is connected to the power input end, and the second output end is connected The first grounding end is connected to the grounding end, and the second grounding end is connected to the second guiding end. An electronic system with low standby loss as described in claim 9 wherein the adapter further comprises: a first connector electrically connected to the first output terminal, the first ground terminal, the second output terminal, and a second grounding end; a shorting component; and an elastic component connecting the first connector and the shorting component such that the shorting component is at a distance from the first connector; wherein the loading device comprises: a second a connector having a power input end and a first conductive end, the first conductive end being connected in parallel with the power input end; wherein, when the first connector is connected to the second connector, the second connection The short circuit element is pushed to compress the elastic element such that the first ground end and the second ground end form a short circuit through the short circuit element. An electronic system having low standby loss as described in claim 9 wherein the load device comprises: a short circuit; wherein the first ground and the second ground are connected when the load device is connected to the adapter A short circuit is formed through the short circuit.