Standby power consumption control circuit

Abstract

The utility model discloses a standby power consumption control circuit, and belongs to the technical field of standby power consumption control circuits. The circuit comprises a power supply chip U6, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a fuse FUSE1, an inductance coil FL1, an X capacitor CX1, an adjustable resistor BR1, an electrolytic capacitor E1, a resistor R15, a capacitor C3, a resistor R18, a diode D2, a capacitor CY1, a capacitor CY2, a capacitor C2, a resistor R13, a voltage device T1, a diode D1, a capacitor C6, an inductor L1, an electrolytic capacitor E2, an electrolytic capacitor E3, a resistor R16, a capacitor C5, a chip U1, an electrolytic capacitor E25, a capacitor C25, a resistor R24, a triode Q1, an optocoupler OP1, a capacitor C1 and a voltage stabilizing diode ZD1. According to the utility model, the controllable precision voltage stabilization source is conducted, the optocoupler is conducted, the purpose of reducing power consumption is achieved, and thus standby power consumption can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the control circuit technical field of standby power consumption especially relates to a control circuit of standby power consumption. BACKGROUND

[0002] For a switching power supply circuit, not only high conversion efficiency is required, but also low standby power consumption is required. At present, in terms of reducing standby power consumption, whether it is pulse frequency modulation (PFM), pulse width modulation (PWM) or hybrid control mode, the power supply control chip frequency is reduced and the control circuit power consumption is reduced to realize low standby power consumption. In terms of the existing power supply control chip standby power consumption reduction method, the control circuit power consumption has little room for reduction, and the standby power consumption cannot be further reduced.

[0003] AC-DC primary side control (PSR) converter has become the development trend of future AC-DC because of its advantages of few peripheral system components, low cost, simple structure and low standby power consumption. The basic topology structure of AC-DC primary side control (PSR) converter includes flyback converter, rectification filter, starting circuit and switch tube; the internal control circuit includes power supply end (VCC) starting and low voltage lock protection (UVLO) circuit, auxiliary winding end feedback voltage (FB) sampling and holding circuit, error amplifier (EA), PWM pulse width modulator, current limiting comparator, RS flip-flop and driver. The internal control part detects the FB voltage of the transformer auxiliary winding Na end, and generates a certain duty cycle signal to control the conduction and shutdown of the switch tube through the internal sampling and holding circuit, error amplifier and PWM pulse width modulator, so that the secondary winding Ns output end voltage Vo is constant voltage. The standby power consumption of the traditional AC-DC primary side control converter cannot be further reduced. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to provide a control circuit of standby power consumption to realize the purpose of reducing power consumption, so as to reduce standby power consumption.

[0005] The utility model adopts the following technical scheme to solve the above technical problem:

[0006] A standby power consumption control circuit, including power chip U6, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, fuse FUSE1, inductor coil FL1, X capacitor CX1, adjustable resistance BR1, electrolytic capacitor E1, resistance R15, capacitor C3, resistance R18, diode D2, capacitor CY1, capacitor CY2, capacitor C2, resistance R13, transformer T1, diode D1, capacitor C6, inductor L1, electrolytic capacitor E2, electrolytic capacitor E3, resistance R16, capacitor C5, chip U1, electrolytic capacitor E25, capacitor C25, resistance R24, triode Q1, optical coupling OP1, capacitor C1, voltage stabilizing diode ZD1, ACL end, ACN end, single-chip microcomputer control port end, +5V voltage end, +12V voltage end;

[0007] Wherein, the ACL end connects one end of the fuse FUSE1, the other end of the fuse FUSE1 connects the interface 1 of the inductor coil, the ACN end connects the interface 2 of the inductor coil, the interface 3 of the inductor coil connects one end of the X capacitor CX1 and the interface 2 of the adjustable resistor BR1 respectively, the interface 4 of the inductor coil connects the other end of the X capacitor CX1 and the interface 3 of the adjustable resistor BR1 respectively, the interface 1 of the adjustable resistor BR1 connects one end of the electrolytic capacitor E1, one end of the resistor R15, one end of the capacitor C3, one end of the capacitor CY2 and the interface 1 of the transformer T1 respectively, the interface 4 of the adjustable resistor BR1 connects the other end of the electrolytic capacitor E1, the power supply chip, one end of the capacitor C20, the interface 3 of the transformer T1 and the interface 3 of the photo-coupler respectively, the other end of the resistor R15 connects the other end of the capacitor C3, one end of the resistor R18 respectively, the other end of the resistor R18 connects the cathode of the diode D2, the anode of the diode D2 connects the power supply chip and the interface 4 of the transformer T1 respectively, the interface 5 of the transformer T1 connects the pin 3 of the power supply chip and the other end of the capacitor C20, the interface 1 of the photo-coupler connects one end of the resistor R24 and one end of the resistor R25 respectively, the interface 2 of the photo-coupler connects the other end of the resistor R25, one end of the capacitor C1, the port 1 of the voltage stabilizing diode ZD1 respectively, the port 2 of the voltage stabilizing diode ZD1 connects one end of the resistor R4, one end of the resistor R5 and the emitter of the triode Q1 and is grounded respectively, the port 3 of the voltage stabilizing diode ZD1 connects one end of the resistor R1, one end of the resistor R2, one end of the resistor R3 respectively, the other end of the resistor R3 connects the other end of the resistor R4 respectively, the collector of the triode Q1 and the base of the triode Q1 connect the other end of the resistor R5 and one end of the resistor R6 respectively, the other end of the resistor R6 connects one end of the resistor R7 and the single-chip microcomputer control port respectively, the other end of the resistor R7 connects the +5V voltage end, the other end of the resistor R24 connects one end of the resistor R13, the negative electrode of the diode D1, one end of the electrolytic capacitor E3, one end of the capacitor C6, one end of the inductor L1, the other end of the resistor R13 connects one end of the capacitor C2 respectively, the other end of the capacitor C2 connects the positive electrode of the diode D1 and the interface 8 of the transformer T1 respectively, the interface 7 of the transformer T1 connects the other end of the electrolytic capacitor E3, the other end of the capacitor C6, one end of the electrolytic capacitor E2, one end of the resistor R16, one end of the capacitor C5, the interface 2 of the chip U1, one end of the electrolytic capacitor E25 and one end of the capacitor C25 and are grounded respectively, the other end of the capacitor C25 connects the other end of the electrolytic capacitor E25, the interface 3 of the chip U1, the +5V voltage end respectively, the interface 1 of the chip U1 connects the other end of the capacitor C5, the other end of the resistor R16, the +12V voltage end, the other end of the electrolytic capacitor E2 and the other end of the inductor L1 respectively.

[0008] As a further preferred scheme of the utility model discloses a standby power consumption control circuit, the transformer T1 adopts EE high frequency transformer.

[0009] As a further preferred scheme of the utility model discloses a standby power consumption control circuit, the inductance L1 is 3.3uH.

[0010] The utility model discloses above technical scheme compares with prior art, has the following technical effect:

[0011] The utility model discloses a standby power consumption control circuit, the reference voltage of controllable precision voltage regulator source ZDI is 2.5V, when the voltage of its third foot is greater than 2.5V, then this controllable precision voltage regulator source is turned on, and photoelectric coupling is turned on, then the primary and the primary of high-frequency transformer pass through power supply chip and cut off, and when the voltage of the third foot of controllable precision voltage regulator source ZD1 is less than 2.5V, then this voltage regulator source is cut off, and photoelectric coupling is cut off, then the primary of high-frequency transformer passes through power supply chip and is turned on, then the induced electromotive force of the secondary end of high-frequency transformer increases, and the output voltage of transformer increases, under the condition of standby, the QI triode controlled by singlechip is cut off, then output voltage UI can be any desired direct current output voltage, but higher than UI voltage, the UI voltage in this schematic diagram is 5V, and UI can also be any voltage, under the condition of starting, the QI triode controlled by singlechip is turned on, then R4 is short-circuited, and U2 is still the secondary output voltage of transformer, under the condition that the resistance value of R2, R3 and R4 is fixed, then by the formula comparison of UI and U2, it can be seen that U1 is less than U2, then under the condition of standby, the voltage output of transformer is low, and the loss of transformer is low, then UI is converted from high voltage to low voltage, and the loss produced when low voltage also will be low, thereby the purpose of reducing power consumption can be realized, and the standby power consumption can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment or prior art description, and obviously, the drawing in the following description is some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0013] Figure 1 It is the circuit diagram of the utility model discloses a standby power consumption control circuit. DETAILED DESCRIPTION

[0014] The technical scheme of the utility model will be further explained in detail in combination with the drawings as follows:

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] A control circuit for standby power consumption, such as Figure 1 As shown, it includes power chip U6, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, fuse FUSE1, inductor FL1, X capacitor CX1, adjustable resistor BR1, electrolytic capacitor E1, resistor R15, capacitor C3, resistor R18, diode D2, capacitor CY1, capacitor CY2, capacitor C2, resistor R13, transformer T1, diode D1, capacitor C6, inductor L1, electrolytic capacitor E2, electrolytic capacitor E3, resistor R16, capacitor C5, chip U1, electrolytic capacitor E25, capacitor C25, resistor R24, transistor Q1, optocoupler OP1, capacitor C1, Zener diode ZD1, ACL terminal, ACN terminal, microcontroller control port terminal, +5V voltage terminal, and +12V voltage terminal;

[0017] The one end of the ACL is connected with the fuse FUSE1, the other end of the fuse FUSE1 is connected with the interface 1 of the inductor coil, the ACN end is connected with the interface 2 of the inductor coil, the interface 3 of the inductor coil is connected with the one end of the X capacitor CX1 and the interface 2 of the adjustable resistor BR1 respectively, the interface 4 of the inductor coil is connected with the other end of the X capacitor CX1 and the interface 3 of the adjustable resistor BR1 respectively, the interface 1 of the adjustable resistor BR1 is connected with the one end of the electrolytic capacitor E1, the one end of the resistor R15, the one end of the capacitor C3, the one end of the capacitor CY2 and the interface 1 of the transformer T1 respectively, the interface 4 of the adjustable resistor BR1 is connected with the other end of the electrolytic capacitor E1, the power supply chip, the one end of the capacitor C20, the interface 3 of the transformer T1 and the interface 3 of the photo-coupler respectively, the other end of the resistor R15 is connected with the other end of the capacitor C3, the one end of the resistor R18 respectively, the other end of the resistor R18 is connected with the cathode of the diode D2, the anode of the diode D2 is connected with the power supply chip and the interface 4 of the transformer T1 respectively, the interface 5 of the transformer T1 is connected with the pin 3 of the power supply chip and the other end of the capacitor C20, the interface 1 of the photo-coupler is connected with the one end of the resistor R24 and the one end of the resistor R25 respectively, the interface 2 of the photo-coupler is connected with the other end of the resistor R25, the one end of the capacitor C1 and the port 1 of the voltage stabilizing diode ZD1 respectively, the port 2 of the voltage stabilizing diode ZD1 is connected with the one end of the resistor R4, the one end of the resistor R5 and the emitter of the triode Q1 and grounded respectively, the port 3 of the voltage stabilizing diode ZD1 is connected with the one end of the resistor R1, the one end of the resistor R2 and the one end of the resistor R3 respectively, the other end of the resistor R3 is connected with the other end of the resistor R4 respectively, the collector of the triode Q1 and the base of the triode Q1 are connected with the other end of the resistor R5 and the one end of the resistor R6 respectively, the other end of the resistor R6 is connected with the one end of the resistor R7 and the single-chip microcomputer control port respectively, the other end of the resistor R7 is connected with the +5V voltage terminal, the other end of the resistor R24 is connected with the one end of the resistor R13, the negative electrode of the diode D1 and the one end of the electrolytic capacitor E3 respectively, the one end of the capacitor C6, the one end of the inductor L1, the other end of the resistor R13 is connected with the one end of the capacitor C2, the other end of the capacitor C2 is connected with the positive electrode of the diode D1 and the interface 8 of the transformer T1 respectively, the interface 7 of the transformer T1 is connected with the other end of the electrolytic capacitor E3, the other end of the capacitor C6, the one end of the electrolytic capacitor E2, the one end of the resistor R16, the one end of the capacitor C5 and the interface 2 of the chip U1 respectively, the one end of the electrolytic capacitor E25 and the one end of the capacitor C25 are connected and grounded, the other end of the capacitor C25 is connected with the other end of the electrolytic capacitor E25, the interface 3 of the chip U1, the +5V voltage terminal respectively, the interface 1 of the chip U1 is connected with the other end of the capacitor C5, the other end of the resistor R16, the +12V voltage terminal, the other end of the electrolytic capacitor E2 and the other end of the inductor L1 respectively.

[0018] The transformer T1 adopts EE high-frequency transformer. The inductor L1 is 3.3uH.

[0019] The reference voltage of the controllable precision voltage stabilizing source ZD1 is 2.5V, that is, when the voltage of the third pin of the controllable precision voltage stabilizing source is greater than 2.5V, the controllable precision voltage stabilizing source is turned on, the optocoupler is turned on, the primary of the high-frequency transformer is cut off through the power supply chip, and the voltage of the secondary end of the high-frequency transformer is reduced; when the voltage of the third pin of the controllable precision voltage stabilizing source ZD1 is less than 2.5V, the voltage stabilizing source is cut off, the optocoupler is cut off, the primary of the high-frequency transformer is turned on through the power supply chip, the induced electromotive force of the secondary end of the high-frequency transformer is increased, and the output voltage of the transformer is increased; in the standby state, the QI triode controlled by the single-chip microcomputer is cut off, the output voltage U1 (the voltage of the secondary output of the transformer in the schematic diagram, which is 12V in the schematic diagram, can be any desired direct-current output voltage, but must be higher than the UI voltage, the UI voltage in the schematic diagram is 5V, and the UI can also be any voltage, but must be less than U) is less than U1-2.5V*R2 / (R3+R4)+2.5V; in the starting state, the QI triode controlled by the single-chip microcomputer is turned on, R4 is short-circuited, U2=2.5V*R2 / R3+2.5V, and U2 is still the secondary output voltage of the transformer; in the case that the resistance values of R2, R3 and R4 are fixed, it can be seen from the formula comparison of UI and U2 that U1 is less than U2, the output voltage of the transformer is low in the standby state, the loss of the transformer is low, UI is converted from high voltage to low voltage, the loss generated in the low voltage state is also low, and therefore the purpose of reducing the power consumption can be achieved, and the standby power consumption can be reduced.

[0020] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless otherwise defined.

[0021] The above embodiments only illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made on the basis of the technical scheme according to the technical idea of the present application falls within the protection scope of the present application. The embodiments of the present application are described in detail above, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the purpose of the present application.

[0022] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A control circuit of standby power consumption, characterized by: Power chip U6, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, fuse FUSE1, inductor coil FL1, X capacitor CX1, adjustable resistance BR1, electrolytic capacitor E1, resistance R15, capacitor C3, resistance R18, diode D2, capacitor CY1, capacitor CY2, capacitor C2, resistance R13, transformer T1, diode D1, capacitor C6, inductor L1, electrolytic capacitor E2, electrolytic capacitor E3, resistance R16, capacitor C5, chip U1, electrolytic capacitor E25, capacitor C25, resistance R24, triode Q1, optocoupler OP1, capacitor C1, voltage stabilizing diode ZD1, ACL end, ACN end, single-chip microcomputer control port end, +5V voltage end, +12V voltage end; One end of the fuse FUSE1 is connected to the AC L terminal, the other end of the fuse FUSE1 is connected to the terminal 1 of the inductor coil, the terminal 2 of the inductor coil is connected to the ACN terminal, the terminal 3 of the inductor coil is connected to one end of the X capacitor CX1 and the terminal 2 of the adjustable resistor BR1 respectively, the terminal 4 of the inductor coil is connected to the other end of the X capacitor CX1 and the terminal 3 of the adjustable resistor BR1 respectively, the terminal 1 of the adjustable resistor BR1 is connected to one end of the electrolytic capacitor E1, one end of the resistor R15, one end of the capacitor C3, one end of the capacitor CY2 and the terminal 1 of the transformer T1 respectively, the terminal 4 of the adjustable resistor BR1 is connected to the other end of the electrolytic capacitor E1, the power supply chip, one end of the capacitor C20, the terminal 3 of the transformer T1 and the terminal 3 of the optocoupler respectively, the other end of the resistor R15 is connected to the other end of the capacitor C3 and one end of the resistor R18 respectively, the other end of the resistor R18 is connected to the cathode of the diode D2, the anode of the diode D2 is connected to the power supply chip and the terminal 4 of the transformer T1 respectively, the terminal 5 of the transformer T1 is connected to the pin 3 of the power supply chip and the other end of the capacitor C20, the terminal 1 of the optocoupler is connected to one end of the resistor R24 and one end of the resistor R25 respectively, the terminal 2 of the optocoupler is connected to the other end of the resistor R25, one end of the capacitor C1 and the port 1 of the voltage stabilizing diode ZD1 respectively, the port 2 of the voltage stabilizing diode ZD1 is connected to one end of the resistor R4, one end of the resistor R5 and the emitter of the triode Q1 and is grounded respectively, the port 3 of the voltage stabilizing diode ZD1 is connected to one end of the resistor R1, one end of the resistor R2 and one end of the resistor R3 respectively, the other end of the resistor R3 is connected to the other end of the resistor R4 respectively, the collector of the triode Q1 and the base of the triode Q1 are connected to the other end of the resistor R5 and one end of the resistor R6 respectively, the other end of the resistor R6 is connected to one end of the resistor R7 and the single-chip microcomputer control port respectively, the other end of the resistor R7 is connected to the +5V voltage terminal, the other end of the resistor R24 is connected to one end of the resistor R13, the negative electrode of the diode D1 and one end of the electrolytic capacitor E3 respectively, one end of the capacitor C6, one end of the inductor L1, the other end of the resistor R13 is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to the positive electrode of the diode D1 and the terminal 8 of the transformer T1 respectively, the terminal 7 of the transformer T1 is connected to the other end of the electrolytic capacitor E3, the other end of the capacitor C6, one end of the electrolytic capacitor E2, one end of the resistor R16, one end of the capacitor C5 and the terminal 2 of the chip U1 respectively, one end of the electrolytic capacitor E25 and one end of the capacitor C25 are connected and grounded, the other end of the capacitor C25 is connected to the other end of the electrolytic capacitor E25, the terminal 3 of the chip U1, the +5V voltage terminal respectively, the terminal 1 of the chip U1 is connected to the other end of the capacitor C5, the other end of the resistor R16, the +12V voltage terminal, the other end of the electrolytic capacitor E2 and the other end of the inductor L1 respectively.

2. The standby power consumption control circuit according to claim 1, characterized by: The transformer T1 is an EE high-frequency transformer.

3. The standby power consumption control circuit according to claim 1, characterized by: The inductor L1 is 3.3uH.

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