CN206341144U

CN206341144U - Low standby power circuit

Info

Publication number: CN206341144U
Application number: CN201621376449.9U
Authority: CN
Inventors: 徐明章; 董朋; 赵利华; 张新立
Original assignee: Sichuan Changhong Electric Co Ltd
Current assignee: Sichuan Changhong Electric Co Ltd
Priority date: 2016-12-15
Filing date: 2016-12-15
Publication date: 2017-07-18
Anticipated expiration: 2026-12-15

Abstract

The utility model is related to low standby power circuit, and the utility model solves the problem of household appliances stand-by power consumption is high, proposes a kind of low standby power circuit, and its technical scheme is：Including switch transformer, primary side absorbing circuit, power supply chip controls circuit and main output feedback circuit, it is characterized in that, also include auxiliary output circuit, microprocessor, microprocessor controlling switch circuit and low differential voltage linear voltage stabilizer circuit, the switch transformer primary side connects primary side absorbing circuit and power supply chip control circuit respectively, secondary side connects main output feedback circuit and auxiliary output circuit respectively, microprocessor controlling switch circuit connects main output feedback circuit, low differential voltage linear voltage stabilizer circuit connects auxiliary output circuit, microprocessor connects microprocessor controlling switch circuit and low differential voltage linear voltage stabilizer circuit respectively.The beneficial effects of the utility model are, simple in construction, easily realize, practicality is very strong, and standby effect is clearly, it is adaptable to household appliances.

Description

Low standby power circuit

Technical field

The utility model is related to energy-saving electric power technology, more particularly to low standby power circuit engineering.

Background technology

Power supply is each electronic equipment, the indispensable important component of household appliances, however Switching Power Supply again because its Efficiency high, small volume, low cost, and be widely used.

At present, each one problem of household appliances generally existing, standby power is very high, many even up to number more than W.Because Substantial amounts of household appliances are in holding state for a long time, cause the huge waste of the energy.Current most of use Switching Power Supplies Household appliances due to technical reason, in the standby state, because not completely cutting through other electricity beyond power supply of microprocessor Source, makes many circuits still in power consumption state, causes standby power still very high.With the release of the new energy consumption standard of country, Stand-by power consumption it is also proposed and clearly require, in the future to the stand-by power consumption requirement of white (black) the color household appliances such as refrigerator, air-conditioning Also will be increasingly harsher.In response to national energy-saving, environmental protection policy, the standby power of reduction household appliances will become as one Gesture, higher energy consumption standard will also be released.

Utility model content

The purpose of this utility model is to solve the problem of current household appliances stand-by power consumption is high, it is proposed that one kind is low to treat electromechanics Source circuit.

The utility model solves its technical problem, and the technical scheme of use is：Low standby power circuit, including switch transformation Device, primary side absorbing circuit, power supply chip control circuit and main output feedback circuit, it is characterised in that also including auxiliary output circuit, Microprocessor, microprocessor controlling switch circuit and low differential voltage linear voltage stabilizer circuit, the switch transformer primary side difference Primary side absorbing circuit and power supply chip control circuit are connected, secondary side connects main output feedback circuit and auxiliary output circuit respectively, Microprocessor controlling switch circuit connects main output feedback circuit, and low differential voltage linear voltage stabilizer circuit connects auxiliary output circuit, micro- Processor connects microprocessor controlling switch circuit and low differential voltage linear voltage stabilizer circuit respectively.

The switch transformer is flyback transformer, wherein, it is the primary side port five of transformer, secondary end port six, secondary Level end port one and secondary end port two are Same Name of Ends.

The transformer is model STR-A6059H transformer.

The auxiliary output circuit includes diode four, electric capacity eight and ground wire, and the anode connecting valve of the diode four becomes Depressor secondary end port two, negative electrode connection low differential voltage linear voltage stabilizer circuit, the positive terminal of electric capacity eight connects the moon of diode four Pole, negative pole end connection ground wire.

The microprocessor controlling switch circuit includes electric capacity six, resistance 11, triode two, triode three and ground wire, The emitter stage of the triode two connects main output feedback circuit, and base stage connects one end of resistance 11, resistance 11 it is another Hold the colelctor electrode of connecting triode three, the emitter stage connection ground wire of triode three, base stage connection microprocessor, the positive pole of electric capacity six Hold the colelctor electrode of connecting triode two, negative pole end connection ground wire.

The triode two is PNP triode, and triode three is NPN triode.

The low differential voltage linear voltage stabilizer circuit includes three terminal regulator, electric capacity ten, electric capacity 11 and ground wire, three end The output pin connection microprocessor of voltage-stablizer, grounding pin connection ground wire, the positive terminal connection three terminal regulator of electric capacity ten Output pin, negative pole end connection ground wire, one end of electric capacity 11 connects the output pin of three terminal regulator, other end connection ground Line.

The beneficial effects of the utility model are, by above-mentioned low standby power circuit, to make standby effect clearly, and Circuit structure is simple, easily realizes, practicality is very strong, it is to avoid the problem of household appliances stand-by power consumption is high.

Brief description of the drawings

Fig. 1 is embodiment circuit structure diagram.

Fig. 2 is circuit theory diagrams of the present utility model.

Wherein, 1 be switch transformer secondary end port one, 2 be switch transformer secondary end port two, 3 for switch become Depressor secondary end port three, 4 be switch transformer primary side port four, and 5 be switch transformer primary side port five, and 6 be switch Primary end port six, 7 be switch transformer primary side port seven, and C1 is electric capacity one, and C2 is electric capacity two, and C3 is electric capacity, C4 is electric capacity four, and C5 is electric capacity five, and C6 is electric capacity six, and C7 is electric capacity seven, and C8 is electric capacity eight, and C9 is electric capacity nine, and C10 is electric capacity Ten, C11 are electric capacity 11, and CY1 is Y capacitance, and R1 is resistance one, and R2 is resistance two, and R3 is resistance three, and R4 is resistance four, and R5 is Resistance five, R6 is resistance six, and R8 is resistance eight, and R10 is resistance ten, and R11 is resistance 11, and D1 is diode one, and D2 is two poles Pipe two, D3 is diode three, and D4 is diode four, and V2 is PNP triode two, and V3 is NPN triode three, and U1 is accurate voltage stabilizing collection Into circuit, U2 is power supply chip, and N1A is the light emitting diode of photoelectrical coupler, and N1B is the phototriode of photoelectrical coupler, U3 is three terminal regulator, and IN is three terminal regulator U3 input pin, and OUT is the output pin of three terminal regulator, and GND is three Hold the grounding pin of voltage-stablizer.

Embodiment

Below in conjunction with the accompanying drawings and embodiment, the technical solution of the utility model is described in detail.

Low standby power electric routing switch transformer described in the utility model, primary side absorbing circuit, power supply chip control electricity Road, main output feedback circuit, auxiliary output circuit, microprocessor, microprocessor controlling switch circuit and low pressure difference linear voltage regulator Circuit is constituted, wherein, switch transformer primary side connects primary side absorbing circuit and power supply chip control circuit, secondary side point respectively Main output feedback circuit and auxiliary output circuit are not connected, and microprocessor controlling switch circuit connects main output feedback circuit, low pressure Difference linear constant voltage regulator circuit connects auxiliary output circuit, and microprocessor connects microprocessor controlling switch circuit and low voltage difference line respectively Property voltage regulator circuit, its circuit theory diagrams is referring to Fig. 2.Here, it can be switched on or off by a microprocessor control signals negative Heavier power supply output is carried, when system is judged as normal operating conditions, microprocessor control signals make heavily loaded out-put supply Connect；When system is judged as holding state, microprocessor control signals cut off heavily loaded out-put supply；Either normal work Make or holding state, powered individually winding all the way is drawn from switch transformer to systematic microprocessor, and it is normal all the time defeated Go out.

Embodiment

The low standby power circuit of the utility model embodiment includes switch transformer, primary side absorbing circuit, power supply chip control The main output feedback circuit of circuit processed, 12V, the auxiliary output circuits of 7.5V, microprocessor, microprocessor controlling switch circuit and low voltage difference Linear regulator circuit, wherein, switch transformer primary side connects primary side absorbing circuit and power supply chip control circuit, two respectively Secondary side connects main output feedback circuit and auxiliary output circuit, the main output feedback electricity of microprocessor controlling switch circuit connection respectively Road, low differential voltage linear voltage stabilizer circuit connects auxiliary output circuit, microprocessor connect respectively microprocessor controlling switch circuit and Low differential voltage linear voltage stabilizer circuit, its circuit structure diagram is referring to Fig. 1.

In foregoing circuit, transformer is model STR-A6059H transformer, wherein, the primary side port five of transformer 5th, secondary end port 66, secondary end port 1 and secondary end port 22 are Same Name of Ends；Auxiliary output circuit includes diode four D4, the C8 of electric capacity eight and ground wire, wherein, the D4 of diode four anode connecting valve transformer secondary output end port 22, negative electrode connection is low Pressure difference linear regulator circuit, the C8 of electric capacity eight positive terminal connection diode four D4 negative electrode, negative pole end connection ground wire；Microprocessor Device controlling switch circuit includes the C6 of electric capacity six, the R11 of resistance 11, the V2 of triode two, the V3 of triode three and ground wire, wherein, three poles The V2 of pipe two emitter stage connects main output feedback circuit, and base stage connects the R11 of resistance 11 one end, and the R11's of resistance 11 is another Hold the V3 of connecting triode three colelctor electrode, the V3 of triode three emitter stage connection ground wire, base stage connection microprocessor, the C6 of electric capacity six The V2 of positive terminal connecting triode two colelctor electrode, negative pole end connection ground wire；The V2 of triode two is PNP triode, triode three V3 is NPN triode；Low differential voltage linear voltage stabilizer circuit includes three terminal regulator U3, the C10 of electric capacity ten, the C11 of electric capacity 11 and ground Line, wherein, three terminal regulator U3 output pin OUT connection microprocessors, grounding pin GND connection ground wires, the C10's of electric capacity ten Positive terminal connection three terminal regulator U3 output pin OUT, negative pole end connection ground wire, the C11 of electric capacity 11 one end connects three ends Voltage-stablizer U3 output pin OUT, other end connection ground wire.

When embodiment circuit works, switch transformer controls the effect of circuit by power supply chip, by high-tension side direct current Electricity is converted into the direct current of low-voltage；Primary side absorbing circuit absorbs the peak voltage in the primary side winding course of work, to reduce EMI Interference；Energy rectifying and wave-filtering after transformer transformation is exported 12V direct currents by main output feedback circuit, normal work need to It is outer that larger load current is provided, in order to export stabilization, it regard 12V outputs as feedback reference；Auxiliary output circuit becomes transformer Energy rectifying and wave-filtering after pressure, exports 7.5V direct currents, and export defeated to low differential voltage linear voltage stabilizer circuit progress secondary pressure Go out 5V to power to systematic microprocessor；Microprocessor controlling switch circuit can control it to turn on and off by systematic microprocessor The passage that main output 12V outwards powers.

When the systems are operating normally, main output feedback circuit output 12V voltages, the circuit to some heavier loads is powered, Auxiliary output circuit exports 7.5V voltages, and 7.5V, which export, to be exported 5V by low differential voltage linear voltage stabilizer circuit and give microprocessor portion confession Electricity；When system is in holding state, can by microprocessor control cut-out, 12V is main exports the passage powered to heavy duty, bear The circuit part power consumption of load-carrying is reduced to 0, and the 7.5V output voltages of auxiliary output circuit pass through low differential voltage linear voltage stabilizer circuit in addition 5V voltages are exported still to microprocessor power supply.Because the power consumption of microprocessor portion is relatively low, the circuit power of load weight is cut off, Whole system only has microprocessor also in stand-by operation state, and system standby power will be substantially reduced.Through actual measurement, in standby mould Under formula, in the case of total input 0.1W, the 5V voltages exported by low differential voltage linear voltage stabilizer circuit can the load with 10mA；Electricity Power attenuation when source is definitely unloaded only has 30mW.

Claims

1. low standby power circuit, including switch transformer, primary side absorbing circuit, power supply chip control circuit and main output feedback Circuit, it is characterised in that also steady including auxiliary output circuit, microprocessor, microprocessor controlling switch circuit and low pressure difference linearity Transformer circuits, the switch transformer primary side connects primary side absorbing circuit and power supply chip control circuit, secondary side point respectively Main output feedback circuit and auxiliary output circuit are not connected, and microprocessor controlling switch circuit connects main output feedback circuit, low pressure Difference linear constant voltage regulator circuit connects auxiliary output circuit, and microprocessor connects microprocessor controlling switch circuit and low voltage difference line respectively Property voltage regulator circuit.

2. low standby power circuit according to claim 1, it is characterised in that the switch transformer is flyback transformation Device, wherein, primary side port five, secondary end port six, secondary end port one and the secondary end port two of transformer are Same Name of Ends.

3. low standby power circuit according to claim 2, it is characterised in that the switch transformer is model STR- A6059H transformer.

4. low standby power circuit according to claim 1, it is characterised in that the auxiliary output circuit includes diode 4th, electric capacity eight and ground wire, the anode connecting valve transformer secondary output end port two of the diode four, negative electrode connection low voltage difference line Property voltage regulator circuit, the positive terminal of electric capacity eight connects the negative electrode of diode four, negative pole end connection ground wire.

5. low standby power circuit according to claim 1, it is characterised in that the microprocessor controlling switch circuit bag Include electric capacity six, resistance 11, triode two, triode three and ground wire, the main output feedback electricity of emitter stage connection of the triode Road, base stage connects one end of resistance 11, the colelctor electrode of the other end connecting triode three of resistance 11, the transmitting of triode three Pole connects ground wire, base stage connection microprocessor, the colelctor electrode of the positive terminal connecting triode two of electric capacity six, negative pole end connection ground Line.

6. low standby power circuit according to claim 5, it is characterised in that the triode two is PNP triode, three Pole pipe three is NPN triode.

7. low standby power circuit according to claim 1, it is characterised in that the low differential voltage linear voltage stabilizer circuit bag Include three terminal regulator, electric capacity ten, electric capacity 11 and ground wire, the output pin connection microprocessor of the three terminal regulator, ground connection Pin connects ground wire, and the positive terminal of electric capacity ten connects the output pin of three terminal regulator, and negative pole end connects ground wire, electric capacity 11 One end connects the output end of three terminal regulator, other end connection ground wire.