CN102780401B - Intelligent control circuit and intelligent control method of switch power supply efficiency - Google Patents
Intelligent control circuit and intelligent control method of switch power supply efficiency Download PDFInfo
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- CN102780401B CN102780401B CN201210259704.1A CN201210259704A CN102780401B CN 102780401 B CN102780401 B CN 102780401B CN 201210259704 A CN201210259704 A CN 201210259704A CN 102780401 B CN102780401 B CN 102780401B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to an intelligent control circuit and an intelligent control method of switch power supply efficiency. The control circuit comprises a switch power supply circuit with a pulse width modulation (PWM) controller, an efficiency control circuit and an audio signal. The efficiency control circuit comprises a control voltage end V0, a power supply circuit for charging the control voltage end V0, a reset circuit for discharging voltage of the control voltage end V0 and a control circuit for controlling the PWM controller to work. The control circuit and the reset circuit are both connected with the audio signal. The control method includes controlling the switch power supply circuit to be in a standby state, an awaken state and a normal working state. The intelligent control circuit and the intelligent control method of the switch power supply efficiency do not need to improve the switch power supply circuit, save improvement cost, are strong in generality, adopt the audio signal to control the working state of a switch power supply, reduce standby power consumption of the switch power supply circuit, and adopt the efficiency control circuit of a pure electronic component so as to further reduce standby power consumption of the circuits.
Description
Technical field
The present invention relates to Switching Power Supply, be specifically related to Switching Power Supply efficiency intelligent control circuit and method.
Background technology
The implementation of Energy Efficiency Standard (such as ErP), proposes new requirement to the design of Switching Power Supply.ErP requires that Switching Power Supply is not when discharging for power consumption equipment, through certain hour, can enter holding state automatically, and requires that power consumption is now less than certain standard (such as 0.5W).In order to meet this requirement, most usual way uses the switching power circuit meeting green standard, and the switching power circuit of so-called green standard, generally has following characteristic: 1, high efficiency and low standby power loss; 2, adopt PFC (power factor correction) circuit of high conversion efficiency, reduce energy loss; 3, possess perfect EMI circuit, have good radiation protection ability.And the general method reducing stand-by power consumption is by addition processing device in original switching power circuit, detect power consumption equipment situation in real time by processor to carry out, its complex structure, and power consumption equipment connects upper but does not work, processor may also can work by control switch power circuit, and this processor is in running order all the time, itself need to consume certain electric energy, and its price is high relative to ordinary electronic components and parts, heat dispersion is poor, need compiler control program simultaneously, extend the construction cycle.
Summary of the invention
For the deficiencies in the prior art, an object of the present invention provides the Switching Power Supply efficiency intelligent control circuit adopting audio signal to reduce stand-by power consumption by carrying out control realization to energy efficiency control circuit.
For achieving the above object, the present invention adopts following technical scheme:
Switching Power Supply efficiency intelligent control circuit, it comprises:
One switching power circuit, described switching power circuit has a PWM controller;
One for controlling described PWM controller work whether energy efficiency control circuit, and the output of described energy efficiency control circuit is connected with the power end of PWM controller;
One for changing the audio signal of energy efficiency control circuit working method, and described audio signal is connected to the input of energy efficiency control circuit;
Wherein, described energy efficiency control circuit comprises control voltage end V0, the power supply circuits that charge for described control voltage end V0, carries out the reset circuit discharged and the control circuit controlling PWM controller work for the voltage of described control voltage end V0; Described control circuit is all connected with audio signal with reset circuit, and control circuit is also connected with control voltage end V0.
As improvement, in order to provide cost savings, accelerate the R&D cycle, described control circuit comprises PNP triode Q101, NPN triode Q102, NPN triode Q103, photoelectrical coupler IC9, NPN triode Q8, NPN triode Q7, electric capacity C105, electric capacity C43, the base stage of described PNP triode Q101 is connected with audio signal, its base stage is also connected with control voltage end V0 by a resistance R101, its emitter is connected with control voltage end V0 by a resistance R102, its collector electrode is connected to the base stage of NPN triode Q102 by electric capacity C105, the grounded emitter of NPN triode Q102, the collector electrode of NPN triode Q102 is connected to voltage controling end V0 by a resistance R103 and resistance R104, the base stage of NPN triode Q103 is connected between resistance R103 and resistance R104, the collector electrode of NPN triode Q103 is connected on the external power supply V1 of energy efficiency control circuit, the emitter of NPN triode Q103 is connected to the electrode input end of photoelectrical coupler IC9, the emitter output of photoelectrical coupler IC9 is connected with the base stage of NPN triode Q8, the collector electrode input of photoelectrical coupler IC9 and the collector electrode of NPN triode Q8, the base stage of NPN triode Q7 is connected respectively, the grounded emitter of NPN triode Q8, the emitter of NPN triode Q7 is connected to the power end of PWM controller, the collector electrode of NPN triode Q7 is connected with the external power supply of switching power circuit with resistance R65 by resistance R52, one end ground connection of electric capacity C43, between the emitter that the other end is connected to NPN triode Q7 and the power end of PWM controller.
Preferably, described power supply circuits comprise ac input end AC1, ac input end AC2, electric capacity C107, described ac input end AC1 is connected to control voltage end V0 by one first rectification circuit, described ac input end AC2 is connected to control voltage end V0 by one second rectification circuit, one end ground connection of electric capacity C107, the other end is connected with control voltage end V0.
Preferably, described first rectification circuit is voltage doubling rectifing circuit, it comprises electric capacity C58, diode D102, diode D101, wherein the positive pole of diode D101 is connected on ac input end AC1 by electric capacity C58, its negative pole is connected with control voltage end V0, the plus earth of diode D102, the negative pole of diode D102 is connected with the positive pole of diode D101.Described second rectification circuit is voltage doubling rectifing circuit, it comprises electric capacity C59, diode D105, diode D104, wherein the positive pole of diode D104 is connected on ac input end AC2 by electric capacity C59, its negative pole is connected with control voltage end V0, the plus earth of diode D105, the negative pole of diode D105 is connected with the positive pole of diode D104.Voltage doubling rectifing circuit can output HIGH voltage, low current direct voltage, meet for control circuit provides the needs of voltage.
Preferably, described reset circuit comprises NPN triode Q105, PNP triode Q104, electric capacity C113, the collector electrode of described NPN triode Q105 is connected to control voltage end V0 by a resistance R116, its grounded emitter, its base stage is connected with the collector electrode of PNP triode Q104 by electric capacity C113, the emitter of PNP triode Q104 is connected by the power supply V1 that a resistance R115 is external with energy efficiency control circuit, its base stage is connected to audio signal, and this base stage is also connected with power supply V1 by a resistance R114.
Preferably, energy efficiency control circuit comprises the pressure limiting circuit for controlling control voltage end V0 threshold value further, described pressure limiting circuit comprises voltage-stabiliser tube D108 and voltage-stabiliser tube D107, the negative pole of described voltage-stabiliser tube D108 is connected with control voltage end V0, its positive pole is connected with the negative pole of voltage-stabiliser tube D107, the plus earth of voltage-stabiliser tube D107.
As a kind of execution mode, this Switching Power Supply efficiency intelligent control circuit is applied in audio-frequency power amplifier, described Switching Power Supply efficiency intelligent control circuit comprises an audio-frequency power amplifier of being powered by switching power circuit further, the power input of described audio-frequency power amplifier is connected to the output of switching power circuit, and the sound source input end of audio-frequency power amplifier is connected with audio signal.
Two of object of the present invention is to provide the Switching Power Supply efficiency intelligent control method adopting audio signal to reduce stand-by power consumption by carrying out control realization to energy efficiency control circuit.
Switching Power Supply efficiency intelligent control method, it is characterized in that, it comprises:
(1) when no audio signal inputs, in reset circuit, NPN triode Q105 ends, stop discharging to control voltage end V0, the voltage of control voltage end V0 is by ac input end AC1, ac input end AC2, slowly rise via the first rectification circuit and the second rectification circuit, now NPN triode Q102 is also in cut-off state, when control voltage end V0 place voltage rise is to certain threshold values, NPN triode Q103 conducting, thus make the diode of photoelectrical coupler IC9 have electric current to pass through, cause NPN triode Q8 conducting, NPN triode Q7 ends, the power end of PWM controller is cut off, when after the voltage drop on electric capacity C43 to the under-voltage voltage of PWM controller, PWM controller quits work, switching power circuit is in holding state, stop supplying power for outside,
(2) when switching power circuit is in holding state, if there is audio signal to input, audio signal is amplified through PNP triode Q101, conducting NPN triode Q102, and then NPN triode Q103 is ended, the diode of photoelectrical coupler IC9 does not have electric current to pass through, NPN triode Q8 ends, NPN triode Q7 conducting, the power end of PWM controller is powered, and switching power circuit is waken up, and audio signal is amplified through PNP triode Q104 simultaneously, conducting NPN triode Q105, the voltage at control voltage end V0 place is discharged by NPN triode Q105;
(3) after switching power circuit is waken up, when there being audio signal to continue input, voltage on electric capacity C43 is risen by resistance R52, resistance R65, NPN triode Q7, reach the starting resistor of PWM controller, switching power circuit normally runs, supplying power for outside, and audio signal is amplified through PNP triode Q104 simultaneously, conducting NPN triode Q105, the voltage at control voltage end V0 place is discharged by NPN triode Q105.
As improvement, the rate of climb of described control voltage end V0 is determined by the capacity of electric capacity C107, and its voltage threshold is determined by pressure limiting circuit.
Switching Power Supply efficiency intelligent control circuit set forth in the present invention and method, compared with prior art, its beneficial effect is:
1, adopt audio signal whether to control the work of the PWM controller of switching power circuit, reduce the stand-by power consumption of switching power circuit, and simple to operate, easy to use;
2, energy efficiency control circuit abandons employing processor, and is realized by pure electronic devices and components, cost-saving, while reducing the R&D cycle, himself can not increase power consumption, reduce further stand-by power consumption;
3, do not need to do any improvement to switching power circuit itself, only energy efficiency control circuit need be connected, save improvement cost, and highly versatile.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit theory diagrams of Switching Power Supply efficiency intelligent control circuit of the present invention;
Accompanying drawing 2 is the structured flowchart of energy efficiency control circuit in the present invention;
The structured flowchart that accompanying drawing 3 is applied in audio-frequency power amplifier for the present invention.
Embodiment
Below, by reference to the accompanying drawings and embodiment, Switching Power Supply efficiency intelligent control circuit of the present invention and method are described further, understand the present invention's technological thought required for protection so that clearer.
As depicted in figs. 1 and 2, Switching Power Supply efficiency intelligent control circuit, it comprises: a switching power circuit 1, and this switching power circuit 1 has a PWM controller 11; One for controlling the energy efficiency control circuit 2 whether described PWM controller 11 works, and the output of energy efficiency control circuit 2 is connected with the power end of PWM controller 11; One for changing the audio signal 3 of energy efficiency control circuit 2 working method, and audio signal 3 is connected to the input of energy efficiency control circuit 2;
Wherein, described energy efficiency control circuit 2 comprises control voltage end V0, the power supply circuits 21 that charge for control voltage end V0, to carry out the reset circuit 23 that discharges and control the control circuit 22 that PWM controller 11 works for the voltage of control voltage end V0; Control circuit 22 is all connected with audio signal 3 with reset circuit 23, and control circuit 22 is also connected with control voltage end V0.
In order to provide cost savings, accelerate the R&D cycle, energy efficiency control circuit 2 adopts pure electronic devices and components to realize, particularly, control circuit 22 comprises PNP triode Q101, NPN triode Q102, NPN triode Q103, photoelectrical coupler IC9, NPN triode Q8, NPN triode Q7, electric capacity C105, electric capacity C43, wherein PNP triode Q101 plays a part to amplify audio signal 3, NPN triode Q102, NPN triode Q103, NPN triode Q8, NPN triode Q7 all plays the effect of switch, electric capacity C105 stops direct current to pass through, and the audio signal 3 after making PNP triode Q101 amplify is passed through, electric capacity C43 adopts big capacity electrolyte capacitor, play energy storage.The base stage of PNP triode Q101 is connected with audio signal 3, its base stage is also connected with control voltage end V0 by a resistance R101, its emitter is connected with control voltage end V0 by a resistance R102, its collector electrode is connected to the base stage of NPN triode Q102 by electric capacity C105, the grounded emitter of NPN triode Q102, the collector electrode of NPN triode Q102 is connected to voltage controling end V0 by a resistance R103 and resistance R104, the base stage of NPN triode Q103 is connected between resistance R103 and resistance R104, the collector electrode of NPN triode Q103 is connected on the external power supply V1 of energy efficiency control circuit, the emitter of NPN triode Q103 is connected to the electrode input end of photoelectrical coupler IC9, the emitter output of photoelectrical coupler IC9 is connected with the base stage of NPN triode Q8, the collector electrode input of photoelectrical coupler IC9 and the collector electrode of NPN triode Q8, the base stage of NPN triode Q7 is connected respectively, the grounded emitter of NPN triode Q8, the emitter of NPN triode Q7 is connected to the power end of PWM controller, the collector electrode of NPN triode Q7 is connected with the external power supply of switching power circuit with resistance R65 by resistance R52, one end ground connection of electric capacity C43, between the emitter that the other end is connected to NPN triode Q7 and the power end of PWM controller 11.PWM controller 11 can adopt CR6848, and photoelectrical coupler IC9 can adopt EL817.
Power supply circuits 21 comprise ac input end AC1, ac input end AC2, electric capacity C107, described ac input end AC1 is connected to control voltage end V0 by one first rectification circuit, described ac input end AC2 is connected to control voltage end V0 by one second rectification circuit, one end ground connection of electric capacity C107, the other end is connected with control voltage end V0.First rectification circuit is voltage doubling rectifing circuit, it comprises electric capacity C58, diode D102, diode D101, wherein the positive pole of diode D101 is connected on ac input end AC1 by electric capacity C58, its negative pole is connected with control voltage end V0, the plus earth of diode D102, the negative pole of diode D102 is connected with the positive pole of diode D101.Described second rectification circuit is voltage doubling rectifing circuit, it comprises electric capacity C59, diode D105, diode D104, wherein the positive pole of diode D104 is connected on ac input end AC2 by electric capacity C59, its negative pole is connected with control voltage end V0, the plus earth of diode D105, the negative pole of diode D105 is connected with the positive pole of diode D104.Voltage doubling rectifing circuit can output HIGH voltage, low current direct voltage, meet for control circuit provides the needs of voltage, ac input end AC1, ac input end AC2 through the filtered output of common mode inductance from the alternating current in switching power circuit 1 external world, adopt and can ensure that energy efficiency control circuit 2 is synchronous with switching power circuit 1 in this way.
Reset circuit 23 comprises NPN triode Q105, PNP triode Q104, electric capacity C113, the collector electrode of described NPN triode Q105 is connected to control voltage end V0 by a resistance R116, its grounded emitter, its base stage is connected with the collector electrode of PNP triode Q104 by electric capacity C113, the emitter of PNP triode Q104 is connected by the power supply V1 that a resistance R115 is external with energy efficiency control circuit 2, its base stage is connected to audio signal, and this base stage is also connected with power supply V1 by a resistance R114.
Energy efficiency control circuit 2 also comprises the pressure limiting circuit for controlling control voltage end V0 threshold value, described pressure limiting circuit comprises voltage-stabiliser tube D108 and voltage-stabiliser tube D107, the negative pole of described voltage-stabiliser tube D108 is connected with control voltage end V0, its positive pole is connected with the negative pole of voltage-stabiliser tube D107, the plus earth of voltage-stabiliser tube D107, photoelectrical coupler IC9 negative input is connected between voltage-stabiliser tube D108 and voltage-stabiliser tube D107.
The method realizing Switching Power Supply efficiency Based Intelligent Control of this foregoing circuit is:
(1) when no audio signal 3 inputs, in reset circuit 23, NPN triode Q105 ends, stop discharging to control voltage end V0, the voltage of control voltage end V0 is by ac input end AC1, ac input end AC2, (rate of climb is determined by the capacity of electric capacity C107) is slowly risen via the first rectification circuit and the second rectification circuit, now NPN triode Q102 is also in cut-off state, when control voltage end V0 place voltage rise is to certain threshold values (being determined by pressure limiting circuit), NPN triode Q103 conducting, thus make the diode of photoelectrical coupler IC9 have electric current to pass through, cause NPN triode Q8 conducting, NPN triode Q7 ends, the power end of PWM controller 11 is cut off, when after the voltage drop on electric capacity C43 to the under-voltage voltage of PWM controller, PWM controller 11 quits work, switching power circuit 1 is in holding state, stop supplying power for outside,
(2) when switching power circuit 1 is in holding state, if there is audio signal 3 to input, audio signal 3 is amplified through PNP triode Q101, conducting NPN triode Q102, and then NPN triode Q103 is ended, the diode of photoelectrical coupler IC9 does not have electric current to pass through, NPN triode Q8 ends, NPN triode Q7 conducting, the power end of PWM controller is powered, switching power circuit is waken up, audio signal 3 is amplified through PNP triode Q104 simultaneously, conducting NPN triode Q105, the voltage at control voltage end V0 place is discharged by NPN triode Q105, circuit is made to be in initial condition,
(3) after switching power circuit is waken up, when there being audio signal to continue input, voltage on electric capacity C43 is risen by resistance R52, resistance R65, NPN triode Q7, reach the starting resistor of PWM controller, switching power circuit normally runs, supplying power for outside, audio signal is amplified through PNP triode Q104 simultaneously, conducting NPN triode Q105, the voltage at control voltage end V0 place is discharged by NPN triode Q105, makes circuit be in initial condition.
The working method of above 3 kinds of switching power circuits (standby, be waken up, normally work) forms circulation successively.
As shown in Figure 3, for control circuit of the present invention is applied to a kind of execution mode of audio-frequency power amplifier, the power input of audio-frequency power amplifier 4 is connected to the output of switching power circuit 1, 4 sound source input ends of audio-frequency power amplifier are connected with audio signal 3, when no audio signal 3 inputs, energy efficiency control circuit 2 control switch power circuit 1 is in holding state, switching power circuit 1 stops powering to audio-frequency power amplifier 4, play the effect reducing switching power circuit stand-by power consumption, when there being audio signal to input, energy efficiency control circuit 2 wake-up switch power circuit 1 also makes it normally work after the regular hour (this regular hour is specifically determined by the capacity of electric capacity C43), switching power circuit 1 is powered for audio-frequency power amplifier 4, simultaneously, this audio signal 3 is connected with the sound source input end of audio-frequency power amplifier 4, this audio signal 3 is play by audio-frequency power amplifier 4.
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection range of the claims in the present invention.
Claims (9)
1. Switching Power Supply efficiency intelligent control circuit, is characterized in that, it comprises:
One switching power circuit, described switching power circuit has a PWM controller;
One for controlling described PWM controller work whether energy efficiency control circuit, and the output of described energy efficiency control circuit is connected with the power end of PWM controller;
One for changing the audio signal of energy efficiency control circuit working method, and described audio signal is connected to the input of energy efficiency control circuit;
Wherein, described energy efficiency control circuit comprises control voltage end V0, the power supply circuits that charge for described control voltage end V0, carries out the reset circuit discharged and the control circuit controlling PWM controller work for the voltage of described control voltage end V0; Described control circuit is all connected with audio signal with reset circuit, and control circuit is also connected with control voltage end V0;
Described control circuit comprises PNP triode Q101, NPN triode Q102, NPN triode Q103, photoelectrical coupler IC9, NPN triode Q8, NPN triode Q7, electric capacity C105, electric capacity C43, the base stage of described PNP triode Q101 is connected with audio signal, its base stage is also connected with control voltage end V0 by a resistance R101, its emitter is connected with control voltage end V0 by a resistance R102, its collector electrode is connected to the base stage of NPN triode Q102 by electric capacity C105, the grounded emitter of NPN triode Q102, the collector electrode of NPN triode Q102 is connected to voltage controling end V0 by a resistance R103 and resistance R104, the base stage of NPN triode Q103 is connected between resistance R103 and resistance R104, the collector electrode of NPN triode Q103 is connected on the external power supply V1 of energy efficiency control circuit, the emitter of NPN triode Q103 is connected to the electrode input end of photoelectrical coupler IC9, the emitter output of photoelectrical coupler IC9 is connected with the base stage of NPN triode Q8, the collector electrode input of photoelectrical coupler IC9 and the collector electrode of NPN triode Q8, the base stage of NPN triode Q7 is connected respectively, the grounded emitter of NPN triode Q8, the emitter of NPN triode Q7 is connected to the power end of PWM controller, the collector electrode of NPN triode Q7 is connected with the external power supply of switching power circuit with resistance R65 by resistance R52, one end ground connection of electric capacity C43, between the emitter that the other end is connected to NPN triode Q7 and the power end of PWM controller.
2. Switching Power Supply efficiency intelligent control circuit according to claim 1, it is characterized in that, described power supply circuits comprise ac input end AC1, ac input end AC2, electric capacity C107, described ac input end AC1 is connected to control voltage end V0 by one first rectification circuit, described ac input end AC2 is connected to control voltage end V0 by one second rectification circuit, one end ground connection of electric capacity C107, the other end is connected with control voltage end V0.
3. Switching Power Supply efficiency intelligent control circuit according to claim 2, it is characterized in that, described first rectification circuit is voltage doubling rectifing circuit, it comprises electric capacity C58, diode D102, diode D101, wherein the positive pole of diode D101 is connected on ac input end AC1 by electric capacity C58, its negative pole is connected with control voltage end V0, the plus earth of diode D102, and the negative pole of diode D102 is connected with the positive pole of diode D101.
4. Switching Power Supply efficiency intelligent control circuit according to claim 2, it is characterized in that, described second rectification circuit is voltage doubling rectifing circuit, it comprises electric capacity C59, diode D105, diode D104, wherein the positive pole of diode D104 is connected on ac input end AC2 by electric capacity C59, its negative pole is connected with control voltage end V0, the plus earth of diode D105, and the negative pole of diode D105 is connected with the positive pole of diode D104.
5. Switching Power Supply efficiency intelligent control circuit according to claim 2, it is characterized in that, described reset circuit comprises NPN triode Q105, PNP triode Q104, electric capacity C113, the collector electrode of described NPN triode Q105 is connected to control voltage end V0 by a resistance R116, its grounded emitter, its base stage is connected with the collector electrode of PNP triode Q104 by electric capacity C113, the emitter of PNP triode Q104 is connected by the power supply V1 that a resistance R115 is external with energy efficiency control circuit, its base stage is connected to audio signal, this base stage is also connected with power supply V1 by a resistance R114.
6. Switching Power Supply efficiency intelligent control circuit according to claim 2, it is characterized in that, energy efficiency control circuit comprises the pressure limiting circuit for controlling control voltage end V0 threshold value further, described pressure limiting circuit comprises voltage-stabiliser tube D108 and voltage-stabiliser tube D107, the negative pole of described voltage-stabiliser tube D108 is connected with control voltage end V0, its positive pole is connected with the negative pole of voltage-stabiliser tube D107, the plus earth of voltage-stabiliser tube D107.
7. Switching Power Supply efficiency intelligent control circuit according to claim 1, it is characterized in that, described Switching Power Supply efficiency intelligent control circuit comprises an audio-frequency power amplifier of being powered by switching power circuit further, the power input of described audio-frequency power amplifier is connected to the output of switching power circuit, and the sound source input end of audio-frequency power amplifier is connected with audio signal.
8. Switching Power Supply efficiency intelligent control method, is characterized in that, it comprises:
(1) when no audio signal inputs, in reset circuit, NPN triode Q105 ends, stop discharging to control voltage end V0, the voltage of control voltage end V0 is by ac input end AC1, ac input end AC2, slowly rise via the first rectification circuit and the second rectification circuit, now NPN triode Q102 is also in cut-off state, when control voltage end V0 place voltage rise is to certain threshold values, NPN triode Q103 conducting, thus make the diode of photoelectrical coupler IC9 have electric current to pass through, cause NPN triode Q8 conducting, NPN triode Q7 ends, the power end of PWM controller is cut off, when after the voltage drop on electric capacity C43 to the under-voltage voltage of PWM controller, PWM controller quits work, switching power circuit is in holding state, stop supplying power for outside,
(2) when switching power circuit is in holding state, if there is audio signal to input, audio signal is amplified through PNP triode Q101, conducting NPN triode Q102, and then NPN triode Q103 is ended, the diode of photoelectrical coupler IC9 does not have electric current to pass through, NPN triode Q8 ends, NPN triode Q7 conducting, the power end of PWM controller is powered, and switching power circuit is waken up, and audio signal is amplified through PNP triode Q104 simultaneously, conducting NPN triode Q105, the voltage at control voltage end V0 place is discharged by NPN triode Q105;
(3) after switching power circuit is waken up, when there being audio signal to continue input, voltage on electric capacity C43 is risen by resistance R52, resistance R65, NPN triode Q7, reach the starting resistor of PWM controller, switching power circuit normally runs, supplying power for outside, and audio signal is amplified through PNP triode Q104 simultaneously, conducting NPN triode Q105, the voltage at control voltage end V0 place is discharged by NPN triode Q105.
9. Switching Power Supply efficiency intelligent control method according to claim 8, is characterized in that, the rate of climb of described control voltage end V0 is determined by the capacity of electric capacity C107, and its voltage threshold is determined by pressure limiting circuit.
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| CN201210259704.1A CN102780401B (en) | 2012-07-25 | 2012-07-25 | Intelligent control circuit and intelligent control method of switch power supply efficiency |
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| CN103425071B (en) * | 2013-08-16 | 2016-08-10 | 深圳市茂宏电气有限公司 | Switching Power Supply energy efficiency control circuit |
| KR101901706B1 (en) * | 2017-03-31 | 2018-11-07 | 삼성전기 주식회사 | Power amplifying apparatus with spurious reduction function |
| CN207200326U (en) * | 2017-07-14 | 2018-04-06 | 天佑电器（苏州）有限公司 | Low-power consumption wake-up circuit, power-supply controller, electric supply installation and electric tool |
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|---|---|---|---|---|
| CN2694667Y (en) * | 2004-03-22 | 2005-04-20 | 深圳创维－Rgb电子有限公司 | Standby circuit and TV set containing the circuit |
| CN201414082Y (en) * | 2009-05-05 | 2010-02-24 | 冠捷投资有限公司 | Power supply |
| CN201623839U (en) * | 2010-01-06 | 2010-11-03 | 刘晓刚 | Power amplifier |
| CN202840964U (en) * | 2012-07-25 | 2013-03-27 | 深圳市茂宏电气有限公司 | Intelligent switch power energy efficiency control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102780401A (en) | 2012-11-14 |
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