WO2011102587A1

WO2011102587A1 - Standby power reduction device

Info

Publication number: WO2011102587A1
Application number: PCT/KR2010/007224
Authority: WO
Inventors: 최순주; 이문배; 임병일; 권오준; 손진형
Original assignee: 코칩 주식회사
Priority date: 2010-02-19
Filing date: 2010-10-21
Publication date: 2011-08-25
Also published as: KR100974334B1

Abstract

The present invention relates to a standby power reduction device which can stop the operation of a switching power supply circuit and supply electric energy charged in an electric double layer capacitor as standby power when electronic equipment is in a standby state, thereby reducing standby power loss. Also, the present invention relates to a standby power reduction device which can maintain a control signal of a signal circuit located in a secondary side of an insulating transformer in a high insulation state and deliver the control signal to a control circuit located in a first side of the insulating transformer, by using a photocoupler. As an example, a standby power reduction device of electronic equipment in which a source ground and equipment ground are maintained by an insulating transformer in an insulation state comprises: a signal circuit using the equipment ground as a ground and generating a control signal; a system control circuit electrically connected to the signal circuit and receiving a user command to control operation of the electronic equipment; a switching power supply circuit using the source ground as a ground and supplying power to the signal circuit through the insulating transformer; a control circuit electrically connected to the switching power supply circuit and receiving the control signal generated by the signal circuit to control the operation of the switching power supply circuit; and a photocoupler located between the signal circuit and control circuit and delivering the control signal generated by the signal circuit to the control circuit while maintaining an insulation state.

Description

Standby power reduction device

The present invention relates to an apparatus for reducing standby power.

The on / off circuit controlled by the microcomputer control cannot continuously operate the power supply of the electronic device because the microcomputer must continue to operate and wait for the user's 'on command' even when the electronic device is in the off state. The microcomputer consumes very little power, but since the power supply unit uses a 220V commercial AC power supply, it is impossible to supply only very fine power, so the power loss generated by the power supply unit is quite large and the electronic device does not operate for a long time. Power loss continuously occurs. In particular, for safety purposes, such as a user's electric shock, a high level of insulation between 4,000 V and 5,000 V is required between the ground of the main body and the power supply.

Accordingly, the electric double layer capacitor having a large capacitance is used to charge the electric double layer capacitor when the electronic device is in the 'on state', and the electric energy charged in the electric double layer capacitor when the electronic device is in the 'off state' using the micro Power up your computer. However, for equipment requiring a high degree of insulation, it is never easy to transfer electrical energy from the secondary side to the primary side of the insulation transformer.

The present invention is to provide a standby power reduction device that can reduce the standby power loss.

An apparatus for reducing standby power of an electronic device in which a power ground and a device ground are insulated by an insulation transformer according to the present invention comprises: a signal circuit using the device ground as a ground and generating a control signal; A system control circuit electrically connected to the signal circuit and controlling an operation of the electronic device in response to a user's command; A switching power supply circuit using the power ground as a ground and supplying power to the signal circuit through the insulation transformer; A control circuit electrically connected to the switching power supply circuit and controlling a operation of the switching power supply circuit by receiving a control signal generated from the signal circuit; And a photo coupler positioned between the signal circuit and the control circuit and transferring the control signal generated from the signal circuit to the control circuit while maintaining an insulation state.

The signal circuit includes a first charging circuit; A first electric double layer capacitor in which electric energy is charged by the first charging circuit; A voltage conversion circuit converting the charging voltage of the first electric double layer capacitor into a stable voltage; A first voltage detection circuit detecting a charging voltage of the first electric double layer capacitor and generating a control command; And a first logic circuit configured to generate a control signal in response to a control command of the first voltage detection circuit.

When the electronic device is in operation, the first electric double layer capacitor may be fully charged while the electronic device is in operation, and the constant current charging may be performed while the electronic device is not operated.

The first voltage detection circuit may generate a power operation command when the charging voltage of the first electric double layer capacitor reaches the charging start voltage, and maintain the state until the charging voltage reaches the charging end voltage. The first voltage detection circuit may generate a power interruption command when the charging voltage of the first electric double layer capacitor reaches the charging end voltage, and maintain the state until the charging voltage reaches the charging start voltage.

The signal circuit may omit the voltage conversion circuit by setting the charge start voltage and the end voltage of the first electric double layer capacitor within a voltage range within which the first voltage detection circuit, the first logic circuit, and the system control circuit can operate. .

The first logic circuit may generate a control signal by taking a logical sum of a control command of the first voltage detection circuit and a control command of the system control circuit.

The control circuit includes a third rectifier circuit for rectifying the output of the switching power supply circuit; A second charging circuit receiving the output of the third rectifier circuit to charge a second electric double layer capacitor; A second electric double layer capacitor in which electric energy is charged by the second charging circuit; A second voltage detection circuit detecting a charging voltage of the second electric double layer capacitor to generate a control command; And a second logic circuit that receives a control command of the second voltage detection circuit and controls an operation of the switching power supply circuit.

The second voltage detection circuit may generate a power operation command when the charging voltage of the second electric double layer capacitor reaches the charging start voltage, and maintain the state until the charging voltage reaches the charging end voltage. The second voltage detection circuit may generate a power interruption command when the charging voltage of the second electric double layer capacitor reaches the charging end voltage, and maintain the state until the charging voltage reaches the charging start voltage.

The second logic circuit may take a logic sum of a control command of the second voltage detection circuit and a control signal transmitted through the photocoupler to supply a bias current to the switching power supply circuit or cut off the supply. In addition, the second logic circuit may supply a bias current to the switching power supply circuit using electrical energy charged in the second electric double layer capacitor.

A starter circuit is further electrically connected between the control circuit and the switching power supply circuit, and the starter circuit can supply a bias current to the switching power supply circuit when the electronic device is first connected to an AC power source.

The starting circuit includes a trigger circuit for generating a trigger signal; A starting power supply circuit which is turned on by the trigger signal and supplies a bias current to the switching power supply circuit; A interruption time detection circuit for giving a command to turn off the starting power supply circuit; And a starting power interrupting circuit for turning off the starting power supply circuit by the command of the interruption time detecting circuit.

The control circuit may include a second electric double layer capacitor charged with electrical energy, and the interruption time detection circuit may detect a charge voltage of the second electric double layer capacitor to determine a break time of the starting power circuit. The control circuit may further include a third rectifier circuit rectifying the output of the switching power supply circuit, and the interruption time detection circuit may detect the output of the third rectifier circuit to determine the interruption time of the starting power supply circuit. .

The interruption time detection circuit may operate only when the starting power supply circuit is turned on.

The standby power reduction apparatus according to an embodiment of the present invention can minimize the power loss by stopping the operation of the switching power supply circuit in the standby state and supplying standby power with electrical energy charged in the electric double layer capacitor.

In addition, the standby power reduction apparatus according to an embodiment of the present invention can transmit the control signal generated in the signal circuit to the control circuit while maintaining the insulation state by using a photo coupler.

1 is a circuit diagram illustrating a standby power reduction apparatus according to an embodiment of the present invention.

FIG. 2A is a detailed circuit diagram of the starting circuit shown in FIG. 1.

FIG. 2B is a detailed circuit diagram of the signal circuit shown in FIG. 1.

FIG. 2C is a graph showing charging characteristics of the first electric double layer capacitor shown in FIG. 2B.

FIG. 2D is a flowchart for describing an operation of the first voltage detection circuit shown in FIG. 2B.

FIG. 2E is a detailed circuit diagram of the control circuit shown in FIG. 1.

2F and 2G are time charts for describing an operation of the standby power reduction device shown in FIG. 1.

3 is a detailed circuit diagram of a control circuit of the standby power reduction apparatus according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings such that those skilled in the art may easily implement the present invention.

Referring to FIG. 1, an apparatus for reducing standby power according to an exemplary embodiment of the present invention may include a start circuit 110, a switching power supply circuit 120, a signal circuit 130, a control circuit 140, and a system control circuit 150. , A function circuit 160 and a photo coupler 170.

The starting circuit 110 supplies a bias current ib to the switching power supply circuit 120 when the electronic device is first connected to the AC power supply 10.

FIG. 2A is a detailed circuit diagram of the starting circuit shown in FIG. 1.

Referring to FIG. 2A, the starter circuit 110 includes a trigger circuit 111, a starter power circuit 112, a cutoff time detection circuit 113, and a starter power shutoff circuit 114.

The trigger circuit 111 detects a change in the output voltage of the first rectifier circuit 20 when the power cord of the electronic device is first connected to the AC power source 10, and generates a trigger signal VT to generate a start power circuit ( Turn on 112).

The starting power supply circuit 112 is turned on by the trigger signal VT generated by the trigger circuit 111 to supply the bias current ib to the switching power supply circuit 120 and to the interruption time detection circuit 113. Supply power. Here, the starting power supply circuit 112 maintains the state until the starting power supply interrupting circuit 114 interrupts the operation of the starting power supply circuit 112 by the command of the interruption time detection circuit 113.

The bias current ib supplied by the starting power supply circuit 112 to the switching power supply circuit 120 uses a very high voltage that directly rectifies the commercial AC voltage of the AC power supply 10, and thus has low power efficiency. In addition, the starting power supply circuit 112 maintains turn-on according to the capacity of the second electric double layer capacitor 143 and the charging current IM and the starting circuit breaking voltage VC during the constant current charging of the second charging circuit 142. The time it takes may vary. However, since the starting power supply circuit 112 supplies the bias current ib to the switching power supply circuit 120 only when the power cord is first connected to the AC power supply 10, power efficiency is not important.

Since the interruption time detection circuit 113 operates by the power supplied from the start power supply circuit 112, it operates only while the start power supply circuit 112 is operated. The interruption time detection circuit 113 detects the charging voltage V2 of the second electric double layer capacitor 143 and, if the charging voltage V2 is higher than the starting circuit breaking voltage VC, starts the power supply blocking command CC. To the starting power interrupting circuit 114.

When the start power cutoff circuit 114 receives the start power cutoff command CC from the cutoff time detection circuit 113, the start power cutoff circuit CS generates a start power cutoff signal CS to turn off the start power cutoff circuit 112. When the starting power supply circuit 112 is turned off, the switching power supply circuit 120 is only activated or cut off by the bias current IB supplied from the control circuit 140. The turn-off start power circuit 112 is forcibly cut off and then reconnected to the AC power supply 10 by unplugging the power cord, or the supply of the AC power supply 10 is interrupted and then supplied again due to a power failure. Otherwise it will not work again.

The switching power supply circuit 120 operates by a bias current supplied from the starter circuit 110 or the control circuit 140. The switching power supply circuit 120 supplies AC power to the second rectifying circuit 40 and the third rectifying circuit 141 through the isolation transformer 30.

The signal circuit 130 charges the first electric double layer capacitor 132 by using the output of the second rectifying circuit 40, and uses the power charged in the first electric double layer capacitor 132 to control the system. Supply power to 150.

The signal circuit 130 generates an on command A3 for the system control circuit 150 to operate the device, or the charging voltage V1 of the first electric double layer capacitor 132 is charged starting voltage VL. If lower, it generates a power operation signal A and transmits it to the control circuit 140 through the photocoupler 170. In addition, the signal circuit 130 ends the charging voltage V1 of the first electric double layer capacitor 132 when the system control circuit 150 generates an off command (B3) to stop the operation of the device. If the voltage is higher than VH, the power cutoff signal B is generated and transmitted to the control circuit 140 through the photocoupler 170.

FIG. 2B is a detailed circuit diagram of the signal circuit shown in FIG. 1. FIG. 2C is a graph showing charging characteristics of the first electric double layer capacitor shown in FIG. 2B, and FIG. 2D is a flowchart illustrating the operation of the first voltage detection circuit shown in FIG. 2B.

Referring to FIG. 2B, the signal circuit 130 may include a first charging circuit 131, a first electric double layer capacitor 132, a voltage conversion circuit 133, a first voltage detection circuit 134, and a first logic circuit. (135).

The first charging circuit 131 charges the first electric double layer capacitor 132 by using the output of the second rectifier circuit 40.

Referring to FIG. 2C, a process of charging the first electric double layer capacitor 132 by the first charging circuit 131 is as follows.

Since the first electric double layer capacitor 132 does not have a charged voltage in the initial stage of charging, there is a risk of breaking the switching power supply circuit 120 or the second rectifier circuit 40 due to the introduction of excessive current. 131 must protect the switching power supply circuit 120 or the second rectifier circuit 40 by limiting the current IC to an appropriate level IM through constant current charging. In addition, the first electric double layer capacitor 132 is not fully charged even if the charging voltage V1 reaches the highest charging voltage VM unless the constant voltage charging continuously supplies the current IC for a long time. There is a characteristic. However, since constant voltage charging over a long time deteriorates charging efficiency, such constant voltage charging is not preferable in a situation where high energy efficiency is required.

Accordingly, the first charging circuit 131 performs constant current charging that limits the current IC when the function circuit 160 is operating, and then charges the highest voltage V1 of the first electric double layer capacitor 132. When the voltage VM is reached, the first electric double layer capacitor 132 is fully charged by switching to constant voltage charging that limits the voltage. The first charging circuit 131 may improve charging efficiency by performing constant current charging when the functional circuit 160 is not operated to charge the first electric double layer capacitor 132 and then not performing constant voltage charging. .

That is, when the function circuit 160 is operating, since the power consumed by the function circuit 160 is large and the power consumed by the constant voltage charging is relatively small, the first charging circuit 131 performs constant voltage charging. To fully charge the first electric double layer capacitor 132. However, since the power consumed by the constant voltage charging cannot be ignored when the function circuit 160 does not operate, the first charging circuit 131 may improve charging efficiency by not performing constant voltage charging.

The first electric double layer capacitor 132 is located on the secondary side of the insulation transformer 30 and the device ground 60 has a common potential. The first electric double layer capacitor 132 is charged through the first charging circuit 131 and supplies power to the system control circuit 150 and the signal circuit 130 while discharging through the voltage conversion circuit 133.

The voltage conversion circuit 133 converts the electric energy charged in the first electric double layer capacitor 132 into a stable voltage and supplies it to the system control circuit 150 and the signal circuit 130. Here, since the charging voltage V1 fluctuates greatly according to the amount of charged electrical energy, the voltage conversion circuit 130 charges the first electric double layer capacitor 132 in the first electric double layer capacitor 132. It converts energy into a stable voltage.

The voltage conversion circuit 133 may use a conventional DC / DC converter or a constant voltage circuit. In addition, when the range of the operating power supply voltage of the system control circuit 150 and the signal circuit 130 is within the fluctuation range of the charging voltage V1 of the first electric double layer capacitor 132, the first electric double layer capacitor. The voltage conversion circuit 133 can be omitted by setting the charging start voltage VL and the charging end voltage VH within the power supply voltage range in which the system control circuit 150 and the signal circuit 130 can operate stably. Can be.

The first voltage detection circuit 134 detects the charging voltage V1 charged in the first electric double layer capacitor 132, and when the charging voltage V1 is lower than the charging start voltage VL, the power operation command A1. When the charging voltage (V1) is higher than the charging end voltage (VH) generates a power supply cutoff command (B1) and transfers to the first logic circuit 135.

Referring to FIG. 2D, the operation of the first voltage detection circuit 134 will be described.

The first voltage detection circuit 134 detects the charging voltage V1 charged in the first electrically charged layer capacitor 132 and operates when the charging voltage V1 is lower than the charging start voltage VL (S1). After generating the command A1 (S3), the state is maintained until the charging voltage V1 reaches the charging end voltage VH. When the charging voltage V1 is higher than the charging end voltage VH (S2), the first voltage detecting circuit 134 generates a power cut command B1 (S4) and then charges the charging voltage V1. The state is maintained until the start voltage VL is reached. As such, the first voltage detection circuit 134 permanently repeats the above operation.

The first logic circuit 135 may include a power up command A1 or a power down command B1 of the first voltage detection circuit 134 and an on command A3 or an off command B3 of the system control circuit 150. The logical sum OR is generated to generate the power operation signal A or the power cutoff signal B and transmit the generated power operation signal A or the power cutoff signal B to the control circuit 140 through the photocoupler 170. In other words, if there is an on command A3 from the system control circuit 150 or if there is a power supply command A1 from the first voltage detection circuit 134, the power source operation signal A is generated and the system control circuit 150 is generated. Only when the off command B3 is received and the power cutoff command B1 is received from the first voltage detection circuit 134, the power cutoff signal B is generated to the control circuit 140 through the photocoupler 170. To pass.

The power operation signal A and the power cut-off signal B generated by the first logic circuit 135 are made into a specific digital code, or the power operation signal A is turned on and the power cut-off signal B is turned off. State, but the present invention does not limit the form of the signal.

The control circuit 140 receives the control signal A / B transmitted through the photocoupler 170 to supply or block the bias current IB to the switching power supply circuit 120. In addition, the control circuit 140 may operate or deactivate the switching power supply circuit 120 to recharge the second electric double layer capacitor 143.

FIG. 2E is a detailed circuit diagram of the control circuit shown in FIG. 1.

Referring to FIG. 2E, the control circuit 140 includes a third rectifier circuit 141, a second charging circuit 142, a second electric double layer capacitor 143, a second voltage detection circuit 144, and a second logic circuit. 145.

The third rectifier circuit 141 rectifies and outputs the output of the switching power supply circuit 120 appearing through the third winding 33 of the insulation transformer 30 to the second charging circuit 142.

The second charging circuit 142 charges the second electric double layer capacitor 143 using the output of the third rectifier circuit 141. Since the detailed operation of the second charging circuit 142 is the same as the operation of the first charging circuit 131, duplicated description will be omitted.

The second electric double layer capacitor 143 has the power ground 50 at a common potential and is charged by the second charging circuit 142. The charging voltage V2 of the second electric double layer capacitor 143 is supplied to the power supply of the control circuit 140 and the bias current IB of the switching power supply circuit 120. The charging start voltage VL and the charging end voltage VH of the second electric double layer capacitor 143 may be set within a voltage range in which the control circuit 140 may maintain smooth operation. If the charging start voltage VL and the charging end voltage VH of the second electric double layer capacitor 143 cannot be set within a voltage range in which the control circuit 140 can maintain a smooth operation, the second A voltage conversion circuit (not shown) may be further electrically connected to the electric double layer capacitor 143.

The second voltage detection circuit 144 detects the charging voltage V2 of the second electric double layer capacitor 143 and generates a power operation command A2 when the charging voltage V2 is lower than the charging start voltage VL. When the charging voltage V2 is higher than the charging end voltage VH, a power cutoff command B2 is generated and transferred to the second logic circuit 145. Since the detailed operation of the second voltage detection circuit 144 is the same as the operation of the first voltage detection circuit 134, duplicate description thereof will be omitted.

The second logic circuit 145 is a power supply of the power supply command A2 or power cutoff command B2 received from the second voltage detection circuit 144 and the signal circuit 130 transmitted through the photocoupler 170. The logic sum OR of the movable signal A or the power cutoff signal B is obtained to supply or cut off the bias current IB of the switching power supply circuit 120.

For example, if the signal transmitted through the photocoupler 170 is the power operation signal A or the command transmitted from the second voltage detection circuit 144 is the power operation command A2, the second logic circuit 145. ) Supplies the bias current IB to the switching power supply circuit 120 to operate the switching power supply circuit 120. In addition, when the signal transmitted through the photocoupler 170 is a power cutoff signal B and the command transmitted from the second voltage detection circuit 144 is a power cutoff command B2, the second logic circuit 145 switches. The operation of the switching power supply circuit 120 is stopped by blocking the bias current IB supplied to the power supply circuit 120.

The system control circuit 150 generates and transmits an on command A3 or an off command B3 according to a user's command to the function circuit 160. That is, when the user instructs the system control circuit 150 to operate the electronic device, the system control circuit 150 generates an on command A3 and transmits the function command to the function circuit 160 to transmit the function circuit 160. It works. On the contrary, when the user instructs the system control circuit 150 to stop the operation of the electronic device, the system control circuit 150 generates an off command B3 and transmits it to the function circuit 160 to transmit the function circuit 160. Stop the operation.

The function circuit 160 operates or stops operating under the command of the system control circuit 150. The function circuit 160 is a circuit that performs the overall function of the electronic device.

The photocoupler 170 transmits the power operation signal A or the power interruption signal B generated from the signal circuit 130 to the control circuit 140 in a state where high insulation is maintained.

Referring to Figure 2f and Figure 2g, the operation of the standby power reduction device having the configuration as described above is as follows.

At the time point T0, when the power cord of the electronic device is connected to the AC power source 10, the first rectifying circuit 20 rectifies the AC voltage to a high DC voltage, and the DC voltage is connected to the switching power supply circuit 120 and the starting circuit. Supplied to 110. At this time, no voltage is applied to the control circuit 140 located at the primary side of the insulation transformer 30 and all the circuits located at the secondary side. In addition, since there is no charged voltage in the first electric double layer capacitor 132 and the second electric double layer capacitor 143, the circuit does not operate and the switching power supply circuit because the bias current IB is not supplied from the control circuit 140. 120 also does not work. When a high DC power is supplied to the start circuit 110, the trigger circuit 111 generates a trigger signal VT to turn on the start power circuit 112, and the start power circuit 112 generates a high DC voltage. The switching power supply circuit 120 is operated by supplying a bias current ib to the switching power supply circuit 120.

As the switching power supply circuit 120 operates, the output of the switching power supply circuit 120 appears in the second winding 32 and the third winding 33 of the insulation transformer 30, respectively. The output of the switching power supply circuit 120 shown in the second winding 32 of the isolation transformer 30 is rectified by the second rectifying circuit 40 and supplied to the function circuit 160 and the signal circuit 130, but is still present. Since there is no on command A3 from the system control circuit 150, the function circuit 160 does not operate. The output of the second rectifier circuit 40 supplied to the signal circuit 130 is charged to the first electric double layer capacitor 132 by the first charging circuit 131. In this case, the first charging circuit 131 rapidly charges the first electric double layer capacitor 132 through constant current charging. The output of the switching power supply circuit 120 shown in the third winding 33 of the insulated transformer 30 is rectified by the third rectifying circuit 141 and the second electric double layer capacitor 143 through the second charging circuit 142. ) Is charged. At this time, the second charging circuit 142 rapidly charges the second electric double layer capacitor 143 through the constant current charging.

At the time T1, when the charging voltage V1 of the first electric double layer capacitor 132 reaches a voltage VS capable of operating the voltage conversion circuit 133, the voltage conversion circuit 133 operates to generate a first voltage. Power is supplied to the first voltage detection circuit 134, the first logic circuit 135, and the system control circuit 150. The first voltage detection circuit 134 detects the charging voltage V1 of the first electric double layer capacitor 132, and since the charging voltage V1 is lower than the charging start voltage VL, a power operation command A1. Is generated and transferred to the first logic circuit 135. The first logic circuit 135 receiving the power operation command A1 generates a power operation signal A, and the power operation signal A is transmitted to the control circuit 140 through the photocoupler 170. The power operation signal A is transmitted to the control circuit 140, but the voltage charged in the second electric double layer capacitor 143 has not yet reached the voltage at which the second logic circuit 145 can operate. There is no influence of the circuit 140 on the switching power supply circuit 120. If the second logic circuit 145 operates to supply the bias current IB to the switching power supply circuit 120, the switching power supply circuit 120 already applies to the bias current ib supplied by the starting circuit 110. As such, the control circuit 140 does not affect the switching power supply circuit 120.

At the time T2, when the charging voltage V2 of the second electric double layer capacitor 143 reaches the voltage VS at which the control circuit 140 can operate, the second voltage detection circuit 144 and the second logic circuit are performed. 145 initiates operation. The second voltage detection circuit 144 detects the charging voltage V2 of the second electric double layer capacitor 143, and as a result, the charging voltage V2 is lower than the charging start voltage VL. A2) is generated and transferred to the second logic circuit 145. The second logic circuit 145 that receives the power-up command A2 supplies the bias current IB to the switching power supply circuit 120, but the switching power supply circuit 120 already supplies the bias supplied by the starter circuit 110. Since the operation is performed by the current ib, the second logic circuit 145 has no influence on the switching power supply circuit 120.

At the time T3, when the charging voltage V2 of the second electric double layer capacitor 143 rises and reaches the start power cutoff voltage VC set in the cutoff time detection circuit 113, the cutoff time detection circuit 113 A start power cutoff command CC is generated and transmitted to the start power cutoff circuit 114. The start power cutoff circuit 114 which has received the start power cutoff command CC generates a start power cutoff signal CS and transmits the start power cutoff signal CS to the start power cutoff circuit 112 before the start. The original circuit 112 is turned off. When the start power supply circuit 112 is turned off, the power supplied to the interruption time detection circuit 113 is cut off so that the interruption time detection circuit 113 no longer operates. As such, the turned-off start power circuit 112 is forcibly disconnected from the AC power supply 10 by disconnecting the power cord and then connected again, or the supply of the AC power supply 10 is not supplied again due to a power failure. One doesn't work forever. When the starting power supply circuit 112 is turned off, the starting power supply circuit 112 cannot supply the bias current ib to the switching power supply circuit 120. Therefore, from this time, the switching power supply circuit 120 operates only by the bias current IB supplied from the control circuit 140.

Here, the charging voltage (V1, V2) of any one of the first electric double layer capacitor 132 and the second electric double layer capacitor 143, the voltage (VS), the charge start voltage (VL) or the first circuit can operate Although a specific voltage, such as a charge end voltage (VH), may be reached, it is technically meaningless which electric double layer capacitor first reaches a specific voltage. Therefore, in the present invention, for convenience of description, the charging voltage V1 of the first electric double layer capacitor 132 reaches a specific voltage first.

At the time T4, when the charging voltage V1 of the first electric double layer capacitor 132 reaches the charging end voltage VH, the first voltage detection circuit 134 generates a power-off command B1 to generate a first logic. Transfer to circuit 135. The first logic circuit 135 receiving the power cutoff command B1 from the first voltage detection circuit 134 generates a power cutoff signal B since there is no on command A3 from the system control circuit 150. Transfer to the second logic circuit 145 through the photocoupler 170. However, since the charging voltage V2 of the second electric double layer capacitor 143 has not yet reached the charging end voltage VH, the second voltage detection circuit 144 holds the power supply command A2. Accordingly, the second logic circuit 145 supplies the bias current IB to the switching power supply circuit 120 to maintain the operation of the switching power supply circuit 120. Since the charging voltage V1 of the first electric double layer capacitor 132 has already reached the charging end voltage VH, the switching power supply circuit 120 continues to operate, and thus the first charging circuit 131 operates in the operation mode. The first electric double layer capacitor 132 is charged by converting from constant current charging to constant voltage charging.

At the time point T5, when the charging voltage V2 of the second electric double layer capacitor 143 reaches the charging end voltage VH, the second voltage detection circuit 144 generates a power-off command B2 to generate the second voltage. Transfer to logic circuit 145. Since the second logic circuit 145 which has received the power cutoff command B2 from the second voltage detection circuit 144 has already received the power cutoff signal B through the photocoupler 170, Shut off the supplied bias current IB. When the supply of the bias current IB is cut off, the switching power supply circuit 120 stops operating. At this time, the power consumption measured by the AC power supply 10 becomes zero.

Since the output of the second rectifying circuit 40 does not appear when the switching power supply circuit 120 stops operating, the first electric double layer capacitor 132 is stopped from charging. The charging voltage V1 of the first electric double layer capacitor 132 is transferred to the system control circuit 150, the first voltage detection circuit 134, and the first logic circuit 135 through the voltage conversion circuit 133. As it is consumed, it gradually descends. In addition, since the output of the third rectifying circuit 141 does not appear when the switching power supply circuit 120 stops operating, charging of the second electric double layer capacitor 143 is stopped and the second electric double layer capacitor 143 Since the charging voltage V2 is consumed by the second voltage detection circuit 144 and the second logic circuit 145, the charging voltage V2 gradually decreases.

At the time T6, the charging voltage V2 of the second electric double layer capacitor 143 becomes lower than the starting circuit breaking voltage VC set in the breaking time detection circuit 113. However, since no power is supplied to the interruption time detection circuit 113 when the start power supply circuit 112 is in the turn-off state, the interruption time detection circuit 113 is activated by the start power supply interrupt circuit according to the change of the charging voltage V2. There is no impact on (114). Further, not only when the start circuit 110 operates but also when the start circuit 110 does not operate, the charging voltage V2 becomes higher than the starting circuit breaking voltage VC due to the repetition of charging and discharging of the second electric double layer capacitor 143. Or lowering condition continuously. However, since no power is supplied to the interruption time detection circuit 113 when the start power supply circuit 112 is in the turn-off state, the interruption time detection circuit 113 is activated by the start power supply interrupt circuit according to the change of the charging voltage V2. There is no impact on (114).

At the point in time T7, when the user instructs the system control circuit 150 to operate the electronic device, the system control circuit 150 generates an on command A3 to operate the function circuit 160 while simultaneously operating the first logic. The on command A3 is transmitted to the circuit 135. The first logic circuit 135 receiving the ON command A3 of the system control circuit 150 generates a power operation signal A and transmits the power operation signal A to the second logic circuit 145 through the photocoupler 170. . The second logic circuit 145 supplies a bias current IB to the switching power supply circuit 120 using the charging voltage V2 charged in the second electric double layer capacitor 143. The switching power supply circuit 120 supplied with the bias current IB starts operation, and an output is generated in the second rectifier circuit 40. Since the output of the second rectifier circuit 40 is supplied to the power of the function circuit 160, the function circuit 160 is operated. In addition, since a part of the output of the second rectifier circuit 40 is charged in the first electric double layer capacitor 132 through the first charging circuit 131, the charging voltage V1 of the first electric double layer capacitor 132 is To rise.

As the switching power supply circuit 120 operates, an output of the third rectifier circuit 141 is generated, and the output of the third rectifier circuit 141 is connected to the second electric double layer capacitor 143 through the second charging circuit 142. ), The charging voltage V2 of the second electric double layer capacitor 143 increases.

At the time T8, when the charging voltage V1 of the first electric double layer capacitor 132 reaches the charging end voltage VH, the first voltage detection circuit 134 generates a power-off command B1 to generate a first logic. Transfer to circuit 135. Since the first logic circuit 135 receives the power-off command B1 from the first voltage detection circuit 134 but receives the on command A3 from the system control circuit 150, the first logic circuit 135 emits the power operation signal A. Maintain state.

In addition, since the charging voltage V1 of the first electric double layer capacitor 132 has already reached the charging end voltage VH, since the switching power supply circuit 120 continues to operate, the first charging circuit 131 is in the charging mode. Is switched from constant current charging to constant voltage charging to continue charging the first electric double layer capacitor 132.

At the time T9, when the charging voltage V2 of the second electric double layer capacitor 143 reaches the charging end voltage VH, the second voltage detection circuit 144 generates a power-off command B2 to generate a second Transfer to logic circuit 145. Since the second logic circuit 145 receives the power cutoff command B2 from the second voltage detection circuit 144, but receives the power operation signal A through the photocoupler 170, the switching power supply circuit 120. Do not interrupt the bias current IB supplied to the.

In addition, although the charging voltage V2 of the second electric double layer capacitor 143 has already reached the charging end voltage VH, since the switching power supply circuit 120 continues to operate, the second charging circuit 142 is in the charging mode. Is switched from constant current charging to constant voltage charging to continue charging the second electric double layer capacitor 143.

At the time T10, when the user commands the system control circuit 150 to stop the operation of the electronic device, the system control circuit 150 generates an off command B3 and transmits it to the function circuit 160 to function. At the same time as the operation of the circuit 160 is stopped, the off command B3 is transmitted to the first logic circuit 135. The first logic circuit 135, which has received the off command B3 from the system control circuit 150, has already received the power cutoff signal B because the first voltage detection circuit 134 is in the power cutoff command B1. It generates and transfers to the second logic circuit 145 through the photocoupler 170. Since the second logic circuit 145, which has received the power cutoff signal B through the photocoupler 170, has already received the power cutoff command B2 from the second voltage detection circuit 144, the switching power supply circuit. The operation stops by blocking the bias current IB supplied to the 120. At this time, the power loss measured by the AC power supply 10 becomes zero.

When the operation of the switching power supply circuit 120 is stopped, since there is no output of the second rectifying circuit 40, the first electric double layer capacitor 132 is stopped from charging. The charging voltage V1 of the first electric double layer capacitor 132 is transferred to the system control circuit 150, the first voltage detection circuit 134, and the first logic circuit 135 through the voltage conversion circuit 133. As it is consumed, it gradually descends. In addition, since the output of the third rectifying circuit 141 does not appear when the switching power supply circuit 120 stops operating, charging of the second electric double layer capacitor 143 is stopped and the second electric double layer capacitor 143 Since the charging voltage V2 is consumed by the second voltage detection circuit 144 and the second logic circuit 145, the charging voltage V2 gradually decreases.

At the time point T11, when the charging voltage V1 of the first electric double layer capacitor 132 reaches the charging start voltage VL, the first voltage detection circuit 134 generates a power-up command A1 to generate a first operation command A1. Transfer to logic circuit 135. The first logic circuit 135 receiving the power up command A1 generates a power up signal A and transmits the power up signal A to the second logic circuit 145 through the port coupler 170, and the second logic circuit 145. ) Supplies the bias current IB to the switching power supply circuit 120 to operate the switching power supply circuit 120.

When the switching power supply circuit 120 is operated, the output of the second rectifying circuit 40 appears, and the output of the second rectifying circuit 40 is the first electric double layer capacitor 132 through the first charging circuit 131. The charge voltage V1 of the first electric double layer capacitor 132 increases because the charge is caused to be caused to be charged to the first electric double layer capacitor 132. At this time, since the system control circuit 150 maintains the off command B3 and the function circuit 160 does not operate, the outputs of the second rectifier circuit 40 are all charged by the first electric double layer capacitor 132. Only used for

In addition, when the switching power supply circuit 120 is operated, the output of the third rectifying circuit 141 appears, and the output of the third rectifying circuit 141 is connected to the second electric double layer capacitor 143 through the second charging circuit 142. ), The charging voltage V2 of the second electric double layer capacitor 143 increases.

At the time point T12, since the charging voltage V1 of the first electric double layer capacitor 132 reaches the charging end voltage VH, the first voltage detection circuit 134 generates a power-off command B1 to generate a first logic. Transfer to circuit 135. The first logic circuit 135 receiving the power cutoff command B1 from the first voltage detection circuit 134 generates the power cutoff signal B because the system control circuit 150 is in the OFF command B3 state. It is transferred to the second logic circuit 145 through the photocoupler 170. On the other hand, in order to charge the first electric double layer capacitor 132 in a state where the charging voltage V2 of the second electric double layer capacitor 143 has not yet reached the charging start voltage VL at the time point T11, 120) worked. Therefore, since the charging voltage V2 of the second electric double layer capacitor 143 has not yet reached the charging start voltage VL, the second voltage detection circuit 144 is in the state of the power cutoff command B2.

The second logic circuit 145 that receives the power cutoff signal B through the photocoupler 170 has a bias current IB because the second voltage detection circuit 144 is in the power cutoff command B2 state. By interrupting the operation of the switching power supply circuit 120 is stopped.

As described above, in order to charge only the electric double layer capacitor in the state in which the function circuit 160 does not operate, the first charging circuit 131 stops charging the voltage V1 of the first electric double layer capacitor 132. Charging is performed in the constant current charging mode until the voltage VH is reached, and when the charging end voltage VH is reached, charging is terminated without switching to constant voltage charging. In addition, since the charging voltage V2 of the second electric double layer capacitor 143 has not yet reached the charging end voltage VH, the second charging circuit 142 charges in the constant current charging mode and charges the voltage V2. Charging is terminated in a state in which the charging end voltage VH is not reached.

As such, in the standby power reduction apparatus according to the embodiment of the present invention, when the function circuit 160 does not operate, the charging circuit charges the electric double layer capacitor through constant current charging, and does not perform constant voltage charging with large power loss. The charging efficiency can be maximized.

In addition, in the standby power reduction apparatus according to the exemplary embodiment of the present invention, when the operation of the switching power supply circuit 120 is stopped, the power loss measured by the AC power supply 10 becomes zero. Accordingly, the standby power reduction apparatus according to an embodiment of the present invention can make the standby time of the electronic device infinite.

Next, a standby power reduction apparatus according to another embodiment of the present invention will be described.

3 is a detailed circuit diagram of a control circuit of the standby power reduction apparatus according to another embodiment of the present invention. The standby power reduction device shown in FIG. 3 is similar to the standby power reduction device shown in FIG. 1. Therefore, only the differences will be described here.

As shown in FIG. 3, the control circuit 240 includes a third rectifier circuit 241, a second charging circuit 242, a second electric double layer capacitor 243, a second voltage detection circuit 244, and a second circuit. The logic circuit 245 includes a first diode 246 and a second diode 247.

The first diode 246 is electrically connected between the second electric double layer capacitor 243 and the second diode 247. The first diode 246 supplies the voltage charged in the second electric double layer capacitor 243 to the power supply of the second voltage detection circuit 244 and the second logic circuit 245 and at the same time the third rectifier circuit 241. The output of is prevented from directly flowing into the second electric double layer capacitor 243.

The second diode 247 is electrically connected between the third rectifier circuit 241 and the first diode 246. The second diode 247 supplies the output of the third rectifier circuit 241 to the power supply of the second voltage detection circuit 244 and the second logic circuit 245. In addition, the second diode 247 stops the operation of the switching power supply circuit 120 so that the current charged in the second electric double layer capacitor 243 is third rectified without the output of the third rectifier circuit 241. Prevents flow to circuit 241.

Looking at the operation of the standby power reduction apparatus according to another embodiment of the present invention having the above structure as follows.

The power supply of the second voltage detection circuit 244 and the second logic circuit 245 is supplied through the first diode 246 from the charging voltage V2 of the second electric double layer capacitor 243, and further includes a third rectifying circuit. It is also supplied through the second diode 247 from the output of 241.

Thus, although the charging voltage V2 of the second electric double layer capacitor 243 has not yet reached a voltage at which the second voltage detection circuit 244 and the second logic circuit 245 can operate, Since the output voltage of the rectifier circuit 241 is supplied to the power supply of the second voltage detection circuit 244 and the second logic circuit 245, the second voltage detection circuit 244 and the second logic circuit 245 can operate. Do. In addition, the interruption time detection circuit 113 detects that the output voltage of the third rectifier circuit 241 appears at an appropriate level, generates a start power cutoff command CC, and turns off the start power circuit 112. The power efficiency of 110 can be improved.

As described above, in the standby power reduction apparatus according to another exemplary embodiment of the present invention, the interruption time detection circuit 113 detects the output of the third rectifier circuit 241 to set the interruption time, and thus, the starting power supply circuit 112 may be used. The supply time of the bias current ib can be shortened. Accordingly, power efficiency can be improved.

What has been described above is only one embodiment for implementing the standby power reduction apparatus according to the present invention, the present invention is not limited to the above-described embodiment, the subject matter of the present invention as claimed in the following claims Without departing from the technical spirit of the present invention to the extent that any person of ordinary skill in the art to which the present invention pertains various modifications can be made.

Claims

In the standby power reduction device of an electronic device in which the power ground and the device ground is insulated by the insulation transformer,

A signal circuit using the device ground as a ground and generating a control signal;

A system control circuit electrically connected to the signal circuit and controlling an operation of the electronic device in response to a user's command;

A switching power supply circuit using the power ground as a ground and supplying power to the signal circuit through the insulation transformer;

A control circuit electrically connected to the switching power supply circuit and controlling a operation of the switching power supply circuit by receiving a control signal generated from the signal circuit; And

Located between the signal circuit and the control circuit, the standby power reduction device comprising a photocoupler for transmitting the control signal generated in the signal circuit to the control circuit while maintaining an insulating state.
The method of claim 1,

The signal circuit

A first charging circuit;

A first electric double layer capacitor in which electric energy is charged by the first charging circuit;

A voltage conversion circuit converting the charging voltage of the first electric double layer capacitor into a stable voltage;

A first voltage detection circuit detecting a charging voltage of the first electric double layer capacitor and generating a control command; And

And a first logic circuit configured to generate a control signal in response to a control command of the first voltage detection circuit.
The method of claim 2,

The first charging circuit is characterized in that the first electric double layer capacitor is fully charged while the electronic device is in operation while the electronic device is in constant current charging, and the electronic device only performs constant current charging when the electronic device is not operating. Standby power reduction device.
The method of claim 2,

The first voltage detection circuit generates a power operation command when the charging voltage of the first electric double layer capacitor reaches the charging start voltage, and maintains the state until the charging voltage reaches the charging end voltage. Standby power reduction device.
The method of claim 2,

The first voltage detection circuit generates a power-off command when the charging voltage of the first electric double layer capacitor reaches the charging end voltage, and maintains the state until the charging voltage reaches the charging start voltage. Standby power reduction device.
The method of claim 2,

The signal circuit is characterized in that the voltage conversion circuit is omitted by setting the charge start voltage and the charge end voltage of the first electric double layer capacitor within a voltage range within which the first voltage detection circuit, the first logic circuit, and the system control circuit can operate. Standby power reduction device.
The method of claim 2,

And the first logic circuit generates a control signal by taking a logical sum of a control command of the first voltage detection circuit and a control command of the system control circuit.
The method of claim 1,

The control circuit

A third rectifier circuit for rectifying the output of the switching power supply circuit;

A second charging circuit receiving the output of the third rectifier circuit to charge a second electric double layer capacitor;

A second electric double layer capacitor in which electric energy is charged by the second charging circuit;

A second voltage detection circuit detecting a charging voltage of the second electric double layer capacitor to generate a control command; And

And a second logic circuit configured to control an operation of the switching power supply circuit in response to a control command of the second voltage detection circuit.
The method of claim 8,

The second voltage detection circuit generates a power operation command when the charging voltage of the second electric double layer capacitor reaches the charging start voltage, and maintains the state until the charging voltage reaches the charging end voltage. Standby power reduction device.
The method of claim 8,

The second voltage detection circuit generates a power-off command when the charging voltage of the second electric double layer capacitor reaches the charging end voltage, and maintains the state until the charging voltage reaches the charging start voltage. Standby power reduction device.
The method of claim 8,

The second logic circuit is configured to take a logic sum of a control command of the second voltage detection circuit and a control signal transmitted through the photocoupler to supply a bias current to the switching power supply circuit or cut off the standby power, characterized in that the supply is cut off. Device.
The method of claim 8,

And the second logic circuit supplies a bias current to the switching power supply circuit using electrical energy charged in the second electric double layer capacitor.
The method of claim 1,

A starting circuit is further electrically connected between the control circuit and the switching power supply circuit.

And the starting circuit supplies a bias current to the switching power supply circuit when the electronic device is first connected to an AC power source.
The method of claim 13,

The starting circuit

A trigger circuit for generating a trigger signal;

A starting power supply circuit which is turned on by the trigger signal and supplies a bias current to the switching power supply circuit;

A interruption time detection circuit for giving a command to turn off the starting power supply circuit;

And a starting power interrupting circuit for turning off a starting power supply circuit by a command of the interruption time detecting circuit.
The method of claim 14,

The control circuit includes a second electric double layer capacitor is charged with electrical energy,

The interruption time detecting circuit detects the charging voltage of the second electric double layer capacitor to determine the interruption time of the starting power supply circuit.
The method of claim 14,

The control circuit includes a third rectifier circuit for rectifying the output of the switching power supply circuit,

The interruption time detection circuit detects the output of the third rectifier circuit to determine the interruption time of the starting power supply circuit.
The method of claim 14,

And said interruption time detecting circuit operates only when said starting power supply circuit is turned on.