CN214506877U - Power consumption control circuit and driving power supply - Google Patents

Abstract

The utility model discloses a power consumption control circuit and a driving power supply, wherein the circuit comprises a signal input unit, a rectification filter unit, a signal comparison unit, a signal reference source unit, a turn-off control unit and a PFC unit; the output end of the signal input unit is connected with the input end of the rectifying and filtering unit, and the output end of the rectifying and filtering unit is connected with the first input end of the signal comparison unit; the second input end of the signal comparison unit is connected with the output end of the signal reference source unit, the output end of the signal comparison unit is connected with the controlled end of the turn-off control unit, and the control end of the turn-off control unit is connected with the PFC unit. According to the scheme, the detection signals are led into the signal comparison unit for comparison, after comparison, the control signals are output to control the turn-off control unit to turn off the corresponding PFC unit, and when the load is light load or no load, the PFC unit is directly turned off, so that lower power consumption is achieved.

Description

Power consumption control circuit and driving power supply

Technical Field

The utility model relates to a field especially relates to a consumption control circuit and drive power supply.

Background

Nowadays, the global environmental protection consciousness is more and more important, and the energy efficiency grade certification of electronic and electric products is added to countries of the European Union successively. The V-level energy efficiency of a switching power supply low-power product is required to be lower than 0.3W in standby mode, the requirement of a low-power intelligent lighting product is lower than 0.5W in low-power chip selectivity, various large chip companies provide relatively good low-power chips, low-power schemes in certain high-power fields are few, high-power supply products all require PFC functions, the market occupancy of low-cost PFC chips is large, the supply period is short, the low-power PFC chips are popular in the market, but the low-power PFC chips are not turned off, the PFC power supply always works when in no load, the PFC works in some cases intermittently, the power consumption is different from 1W to 10W, the intermittent work is equal to impact work, and the service life of a driving power supply is shortened.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a consumption control circuit and drive power supply.

In a first aspect, the present invention provides a power consumption control circuit, which includes a signal input unit, a rectifying and filtering unit, a signal comparing unit, a signal reference source unit, a turn-off control unit and a PFC unit;

the output end of the signal input unit is connected with the input end of the rectifying and filtering unit, the output end of the rectifying and filtering unit is connected with the first input end of the signal comparison unit, and the signal input unit is used for inputting a detection signal into the signal comparison unit after the detection signal is filtered by the rectifying and filtering unit;

the second input end of the signal comparison unit is connected with the output end of the signal reference source unit, the output end of the signal comparison unit is connected with the controlled end of the turn-off control unit, the control end of the turn-off control unit is connected with the PFC unit, and the signal comparison unit is used for receiving a detection signal, comparing the detection signal with a preset reference signal, and outputting a control signal to control the turn-off control unit to turn off the PFC unit.

In a second aspect, the present invention provides a driving power supply, including the power consumption control circuit as described above.

The utility model has the advantages that: the utility model provides a power consumption control circuit and drive power supply, wherein, power consumption control circuit is through adopting multiple different detection signal to do signal input to compare with the reference signal, can select suitable detection signal according to actual need, and applied power supply topological structure is wide; the detection signal is led into the signal comparison unit through the rectification filter unit for comparison, after comparison, the control signal is output to control the turn-off control unit to turn off the corresponding PFC unit, and when the load is light load or no load, the PFC unit is directly turned off, so that lower power consumption is achieved, electric energy is saved, and the service life of the circuit is prolonged.

Drawings

Fig. 1 is a schematic block diagram of an embodiment of a power consumption control circuit of the present invention:

fig. 2 is a circuit diagram of an embodiment of a power consumption control circuit according to the present invention;

fig. 3 is a circuit diagram of a signal reference source unit according to an embodiment of the present invention;

fig. 4 is a circuit diagram of a PFC unit according to an embodiment of the present invention;

fig. 5 is a flowchart of a method according to an embodiment of the present invention.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and the following detailed description.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured" are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

Referring to fig. 1-4, the utility model provides a power consumption control circuit, including signal input unit 10, rectification filter unit 20, signal comparison unit 30, signal reference source unit 40, shutoff control unit 50 and PFC unit 60, this scheme is through signal input unit 10 sampling multiple different detected signal and is done signal input to compare with the reference signal, can select suitable detected signal according to actual need, applied power topological structure is wide; and, the detection signal is led into the signal comparison unit 30 through the rectification filter unit 20 for comparison, after the comparison, the output control signal controls the turn-off control unit 50 to turn off the corresponding PFC unit 60, and when the load is light load or no load, the PFC unit 60 is directly turned off, so that the power consumption is lower, the electric energy is saved, and the service life of the circuit is prolonged.

In this embodiment, the output end of the signal input unit 10 is connected to the input end of the rectifying and filtering unit 20, the output end of the rectifying and filtering unit 20 is connected to the first input end of the signal comparing unit 30, and the signal input unit 10 is configured to input the detection signal into the signal comparing unit 30 after being filtered by the rectifying and filtering unit 20; the second input end of the signal comparing unit 30 is connected to the output end of the signal reference source unit 40, the output end of the signal comparing unit 30 is connected to the controlled end of the shutdown control unit 50, the control end of the shutdown control unit 50 is connected to the PFC unit 60, and the signal comparing unit 30 is configured to receive the detection signal, compare the detection signal with a preset reference signal, and output a control signal to control the shutdown control unit 50 to shutdown the PFC unit 60.

Referring to fig. 1, in the present embodiment, a signal input unit 10 includes a first signal module 11, a second signal module 12, a third signal module 13, and a fourth signal module 14. The output ends of the first signal module 11, the second signal module 12, the third signal module 13 and the fourth signal module 14 are all connected to the input end of the rectifying and filtering unit 20, and in actual use, one of the four detection signals is rectified and filtered and then sent to pin 3 of the operational amplifier U1A to be compared with a reference signal.

The first signal module 11 is configured to input a PWM dimming signal to the signal comparison unit 30, where the PWM dimming signal may be generated by a PWM dimming circuit and actively transmitted to the signal input unit 10. The second signal module 12 is configured to input a PWM output signal of the PFC unit 60 to the signal comparison unit 30, where the PWM output signal is obtained from a PFC chip of the PFC unit 60, and when the load is no-load, an output PWM duty ratio of the PFC chip is minimum, so that whether the load is no-load can be determined according to a magnitude of the output PWM signal. The third signal module 13 is configured to input a current detection signal to the signal comparison unit 30, where the current detection signal may be detected by a current detection circuit additionally disposed and fed back to the third signal module 13; the fourth signal module 14 is configured to input a coupling voltage signal of the PFC inductor of the PFC unit 60 to the signal comparison unit 30. The PWM dimming signal, the PWM output signal, the current detection signal, and the coupling voltage signal are compared with the reference signal, and as long as any one of the detection signals is smaller than the reference signal, the PFC unit 60 is turned off immediately, so that the types of applicable power supply products of the present scheme are widened, and simultaneously, the power consumption of the power supply when the load is no-load or light-load is reduced, and the electric energy is saved.

As shown in fig. 2, in the present embodiment, the PWM dimming signal DIM, the PWM output signal DRV, the current detection signal ISENS and the coupling voltage signal DV are connected in parallel at the same point and connected to the rectifying and filtering unit 20, and the first signal module 11, the second signal module 12, the third signal module 13 and the fourth signal module 14 are sequentially sampled and connected in parallel by using the working relationship of signal differences, so that the sequential isolation control does not affect the circuit operation abnormality of other signal modules; the scheme has the advantages that the structure is simple, different detection signal sampling can be realized while the circuit is concise, the energy-reducing selection point is controlled to be in place, and the balance grasping of the stress of the device is favorable for high reliability and long service life of the product.

Referring to fig. 2, in the present embodiment, the signal comparing unit 30 includes an operational amplifier U1A, a sixth resistor R13, a seventh resistor R7 and a first capacitor C3, a non-inverting terminal of the operational amplifier U1A is connected to first terminals of the sixth resistor R13, the seventh resistor R7 and the first capacitor C3, second terminals of the sixth resistor R13 and the first capacitor C3 are grounded, a second terminal of the seventh resistor R7 is connected to the signal reference source unit 40, and an inverting terminal of the operational amplifier U1A is connected to an output terminal of the rectifying and filtering unit 20. The voltage divider circuit is composed of R7, R13 and C3, and is input from the 3-pin in the in-phase end of the operational amplifier U1A, when the voltage signal of the 2-pin in the inverting end of the operational amplifier U1A is lower than the voltage of the 3-pin in the reference, the 1-pin in the output end of the operational amplifier U1A is at a high level, that is, when the detection signal is lower than the reference signal, the first power switch Q2 is triggered to conduct.

Referring to fig. 2, in the present embodiment, the rectifying and filtering unit 20 includes an RC rectifying and filtering circuit, wherein the resistor R11, the resistor R6, the resistor R10, the capacitor C4, the capacitor C5 and the capacitor C6 are connected to form the RC rectifying and filtering circuit (the rectifying and filtering unit 20), and the RC rectifying and filtering circuit is used for rectifying and filtering the detection signal and then inputting the detection signal to the inverting terminal 2 pin of the operational amplifier U1A to further perform comparison in the operational amplifier U1A.

In this embodiment, the shutdown control unit 50 includes a shutdown module 51 and a start-up bias module 52, the controlled terminal of the control module is connected to the signal comparison unit 30, the control terminal of the control module is connected to the controlled terminal of the start-up bias module 52, the control terminal of the start-up bias module 52 is connected to the PFC unit 60, and the control module is configured to receive the control signal of the signal comparison unit 30 and control the start-up bias module 52 to shut down the PFC unit 60 based on the control signal.

Referring to fig. 2, in the present embodiment, the turn-off module 51 includes a first power switch Q2 and a fifth resistor R5, a gate of the first power switch Q2 is connected to the output terminal of the operational amplifier U1A through the fifth resistor R5, a source of the first power switch Q2 is grounded, and a drain of the first power switch Q2 is connected to the start-up bias module 52.

Referring to fig. 2, in the present embodiment, the start-up bias module 52 includes a second power switch Q1, a first diode D1, a clamp diode ZD1, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4; the first end of a first resistor R1, the cathode of a clamping diode ZD1, the cathode of a first diode D1 and the grid of a second power switch tube Q1 are connected with the drain of the first power switch tube Q2, the anode of the clamping diode ZD1 is grounded, the second end of a first resistor R1 is sequentially connected with a third resistor R3 and a second resistor R2 in series, and a second resistor R2 is connected with rectified high voltage; the drain of the first power switch Q2 is connected to the STV terminal, the source of the first power switch Q2 is connected to the STV1 terminal and the first terminal of the fourth resistor R4, and the second terminal of the fourth resistor R4 is connected to the anode of the first diode D1.

When the PFC chip works normally, the voltage of the STV1 is higher than the STV, the first diode D1 is used for isolation and acceleration, the voltage at the STV1 is conducted to the grid of the Q1 in the forward direction through the fourth resistor R4 and the first diode D1, the Q1 is deeply turned on, the on and off of the Q1 are controlled by the first power switch tube Q2, and the work of the Q2 is controlled by the operational amplifier U1A.

The first resistor R1, the second resistor R2 and the third resistor R3 are connected in series, the clamping diode ZD1 clamps the voltage, the second resistor R2 is connected with the rectified high voltage, the first resistor R1 is connected with the grid of the second power switch tube Q1 and the anode of the clamping diode ZD1 in parallel, and the ZD1 clamps the starting bias module 52 at the highest working voltage of the PFC chip, namely the starting voltage of the PFC chip, so that the voltage at the STV can be completely conducted to the STV1 by the second power switch tube Q1.

As shown in fig. 2, in the present embodiment, when the voltage of the detection signal is lower than the voltage of the preset reference signal, the output terminal 1 of the operational amplifier U1A outputs a high level, at this time, the first power switch Q2 is turned on, the first power switch Q2 is turned on to pull down the gate of the second power switch Q1, that is, Q1 is turned off, at this time, STV and STV1 are turned off, so that the energy on the start resistor cannot be temporarily transferred to the VDD pin of the PFC chip of the PFC unit 60, the PFC unit 60 stops all operations, that is, there is no loss at all, so that real energy saving can be achieved, and the PFC unit 60 basically achieves 0 loss when turned off; only after the loaded signal of the equal load or the external PWM dimming signal is greater than the preset reference signal of the signal comparing unit 30, the first power switch Q2 is released, and the second power switch Q1 is turned on, so that the PFC unit 60 can work again.

In this embodiment, the signal reference source unit 40 includes a TL431 reference source U2, an eighth resistor R12 and a second capacitor C2, an anode of the TL431 reference source U2 is connected to a first end of the second capacitor C2, a reference of the TL431 reference source U2 is connected to a second end of the second capacitor C2 and a second end of the seventh resistor R7, a cathode of the TL431 reference source U2 is connected to a first end of the eighth resistor R12, and a second end of the eighth resistor R12 is connected to the VD15 for power input. The utility model discloses a power supply of signal reference source unit 40 is supplied power by independent VCC, and TL431 reference source U2 is accurate 2.5V reference source, and TL431 reference source U2 is by resistance R12 current-limiting and output, and TL431 reference source U2 is the most ordinary 431 reference source chip, the 2.5V reference voltage that can conveniently realize.

Referring to fig. 4, in the present embodiment, the PFC unit 60 includes a PFC chip, a third power switch Q3, a start resistor and a PFC inductor L1, a drain of the third power switch Q3 is connected to a first end of the start resistor (series connected resistors R2, R3 and R4), a second end of the start resistor is connected to a power supply input, a gate of the third power switch Q3 contacts a signal, a source of the third power switch Q3 is connected to a VDD terminal of the PFC chip, a first end of the PFC inductor L1 is connected to ground, and the second end is connected to the VDD terminal of the PFC chip.

The third power switch Q3 is connected in series between the start resistor and the power supply pin VDD of the PFC chip, when the load becomes low, the current on the PFC inductor decreases, the secondary side induced electromotive force decreases, i.e., the induced voltage decreases, and the energy supply of the PFC chip cannot be maintained, and since the operational amplifier U1A of the signal comparison unit 30 is triggered after the input detection signal is lower than the reference signal, i.e., the 1 pin of U1A outputs a high level, the Q2 is controlled to turn on and off the Q1 under the control of the Q2, the operation of the Q1 is controlled by the operational amplifier U1A, the Q2 is turned on to pull down the potential of the gate of the Q1, i.e., the Q1 is turned off, and the STV and STV1 are turned off, so that the energy on the start resistor cannot be temporarily transferred to the VDD pin of the PFC chip, and the PFC chip stops all operations, i.e., no loss occurs at all.

The power consumption control circuit of the scheme adopts various different detection signals as signal input and compares the signal input with a reference signal, so that a proper detection signal can be selected according to actual needs, and the applied power supply topological structure is wide; the detection signal is led into the signal comparison unit 30 through the rectification filter unit 20 for comparison, and after comparison, the output control signal controls the turn-off control unit 50 to turn off the corresponding PFC unit 60, and when the load is light load or no load, the PFC unit 60 is directly turned off, so that the power consumption is lower, the electric energy is saved, and the service life of the circuit is prolonged.

The utility model also provides a driving power supply, include as above consumption control circuit.

The power consumption control circuit of the driving power supply adopts various different detection signals as signal input and compares the signal input with a reference signal, so that a proper detection signal can be selected according to actual needs, and the application power supply has a wide topological structure; the detection signal is led into the signal comparison unit 30 through the rectification filter unit 20 for comparison, and after comparison, the output control signal controls the turn-off control unit 50 to turn off the corresponding PFC unit 60, and when the load is light load or no load, the PFC unit 60 is directly turned off, so that the power consumption is lower, the electric energy is saved, and the service life of the circuit is prolonged.

Referring to fig. 5, the present invention also provides a power consumption control method based on the driving power supply, including steps S10-S40.

And S10, acquiring detection signals, wherein the detection signals comprise a PWM dimming signal, a PWM output signal of the PFC unit, a current detection signal and a coupling voltage signal of a PFC inductor of the PFC unit.

In the present embodiment, the PWM dimming signal may be generated by the PWM dimming circuit and actively transmitted to the signal input unit; the PWM output signal is taken from a PFC chip of the PFC unit, and when the load is in no-load, the output PWM duty ratio of the PFC chip is minimum, so that whether the load is in no-load can be judged according to the size of the output PWM signal; the current detection signal can be detected by a current detection circuit which is additionally arranged; the coupling voltage signal is the coupling voltage signal of the PFC inductor of the PFC unit, and the scheme adopts various different detection signals as signal input, selects one detection signal to be compared with a reference signal, can select a proper detection signal according to actual needs, and widens the application power supply topological structure.

And S20, filtering the detection signal and inputting the filtered detection signal into the signal comparison unit.

And S30, comparing the detection signal with a preset reference signal threshold value through a signal comparison unit, and judging whether the detection signal is lower than the preset reference signal.

And S40, if the detection signal is lower than the preset reference signal, outputting a control signal through the signal comparison unit to control the shutdown control unit to shut down the driving power supply.

In this embodiment, the detection signal is introduced into the signal comparison unit 30 through the rectifying and filtering unit 20 for comparison, and after the comparison, the output control signal controls the shutdown control unit 50 to shutdown the corresponding PFC unit 60, and when the load is light load or no load, the PFC unit 60 is directly shutdown, so as to achieve lower power consumption, save more electric energy, and improve the service life of the circuit.

Specifically, referring to fig. 1 and 2, when the voltage of the detection signal is lower than the voltage of the preset reference signal, the output terminal 1 of the operational amplifier U1A outputs a high level, at this time, the first power switch Q2 is turned on, the first power switch Q2 is turned on to pull down the gate of the second power switch Q1, that is, Q1 is turned off, at this time, STV and STV1 are turned off, so that the energy on the start resistor cannot be temporarily transferred to the VDD pin of the PFC chip of the PFC unit 60, the PFC unit 60 stops all operations, that is, there is no loss at all, so that real energy saving can be achieved, and the PFC unit 60 basically achieves 0 loss when turned off; only after the loaded signal of the equal load or the external PWM dimming signal is greater than the preset reference signal of the signal comparing unit 30, the first power switch Q2 is released, and the second power switch Q1 is turned on, so that the PFC unit 60 can work again.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims (9)

1. A power consumption control circuit is characterized by comprising a signal input unit, a rectifying and filtering unit, a signal comparison unit, a signal reference source unit, a turn-off control unit and a PFC unit;

the output end of the signal input unit is connected with the input end of the rectifying and filtering unit, the output end of the rectifying and filtering unit is connected with the first input end of the signal comparison unit, and the signal input unit is used for inputting a detection signal into the signal comparison unit after the detection signal is filtered by the rectifying and filtering unit;

the second input end of the signal comparison unit is connected with the output end of the signal reference source unit, the output end of the signal comparison unit is connected with the controlled end of the turn-off control unit, the control end of the turn-off control unit is connected with the PFC unit, and the signal comparison unit is used for receiving a detection signal, comparing the detection signal with a preset reference signal, and outputting a control signal to control the turn-off control unit to turn off the PFC unit.

2. The power consumption control circuit of claim 1, wherein the signal input unit includes a first signal module, a second signal module, a third signal module, and a fourth signal module; the output ends of the first signal module, the second signal module, the third signal module and the fourth signal module are all connected with the input end of the rectification filter unit, the first signal module is used for inputting a PWM dimming signal to the signal comparison unit, the second signal module is used for inputting a PWM output signal of the PFC unit to the signal comparison unit, the third signal module is used for inputting a current detection signal to the signal comparison unit, and the fourth signal module is used for inputting a coupling voltage signal of a PFC inductor of the PFC unit to the signal comparison unit.

3. The power consumption control circuit according to claim 2, wherein the signal comparison unit includes an operational amplifier, a sixth resistor, a seventh resistor, and a first capacitor, a non-inverting terminal of the operational amplifier is connected to first terminals of the sixth resistor, the seventh resistor, and the first capacitor, a second terminal of the sixth resistor and the first capacitor is connected to ground, a second terminal of the seventh resistor is connected to the signal reference source unit, and an inverting terminal of the operational amplifier is connected to an output terminal of the rectifying and filtering unit.

4. The power consumption control circuit according to claim 3, wherein the rectifying-filtering unit includes an RC rectifying-filtering circuit.

5. The power consumption control circuit of claim 4, wherein the shutdown control unit comprises a shutdown module and a start-up bias module, the controlled terminal of the control module is connected to the signal comparison unit, the controlled terminal of the control module is connected to the controlled terminal of the start-up bias module, the control terminal of the start-up bias module is connected to the PFC unit, and the control module is configured to receive the control signal of the signal comparison unit and control the start-up bias module to shut down the PFC unit based on the control signal.

6. The power consumption control circuit of claim 5, wherein the turn-off module comprises a first power switch tube and a fifth resistor, a gate of the first power switch tube is connected to the output terminal of the operational amplifier through the fifth resistor, a source of the first power switch tube is grounded, and a drain of the first power switch tube is connected to the start-up bias module;

the starting bias module comprises a second power switch tube, a first diode, a clamping diode, a first resistor, a second resistor, a third resistor and a fourth resistor; the first end of the first resistor, the cathode of the clamping diode, the cathode of the first diode and the grid electrode of the second power diode are connected with the drain electrode of the first power switch tube, the anode of the clamping diode is grounded, the second end of the first resistor is sequentially connected with a third resistor and a second resistor in series, and the second resistor is connected with rectified high voltage; the drain electrode of the first power switch tube is connected with the STV end, the source electrode of the first power switch tube is connected with the STV1 end and the first end of the fourth resistor, and the second end of the fourth resistor is connected with the anode of the first diode.

7. The power consumption control circuit of claim 3, wherein the signal reference source unit comprises a TL431 reference source, an eighth resistor and a second capacitor, wherein an anode of the TL431 reference source is connected with a first end of the second capacitor, a reference end of the TL431 reference source is connected with a second end of the second capacitor and a second end of the seventh resistor, a cathode of the TL431 reference source is connected with a first end of the eighth resistor, and a second end of the eighth resistor is connected with a power supply input.

8. The power consumption control circuit of claim 6, wherein the PFC unit comprises a PFC chip, a third power switch tube, a start resistor and a PFC inductor, a drain of the third power switch tube is connected to a first end of the start resistor, a second end of the start resistor is connected to a power supply input, a gate of the third power switch tube is contacted with a signaling signal, a source of the third power switch tube is connected to a VDD end of the PFC chip, a first end of the PFC inductor is grounded, and a second end of the PFC inductor is connected to a VDD end of the PFC chip.

9. A driving power supply comprising the power consumption control circuit according to any one of claims 1 to 8.

Images