CN202617006U - Green energy-saving novel AC-DC switch power supply - Google Patents
Green energy-saving novel AC-DC switch power supply Download PDFInfo
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- CN202617006U CN202617006U CN2012202549912U CN201220254991U CN202617006U CN 202617006 U CN202617006 U CN 202617006U CN 2012202549912 U CN2012202549912 U CN 2012202549912U CN 201220254991 U CN201220254991 U CN 201220254991U CN 202617006 U CN202617006 U CN 202617006U
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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
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Abstract
The utility model provides a green energy-saving novel AC-DC switch power supply which is low in standby power consumption and has the properties of energy saving and consumption reduction under the condition of zero load, and overcomes the defect of high standby power consumption in the prior art. The power supply includes a lightning protection circuit, commercial power is input to the lightning protection circuit, and the output is connected to an EMI circuit, the output of the EMI circuit is transmitted to a rectification filter circuit, DC voltage after being rectified and filtered is transmitted to a power conversion circuit, the power conversion circuit converts the DC voltage after being rectified and filtered to an AC and inputs the AC to the rectification filter circuit, the rectification filter circuit converts the output of the power conversion circuit to an DC which is input to an output circuit before being output to a load, a sampling circuit is connected to the output circuit and samples an output voltage, and the sampling is transmitted to a PWM controller after passing through a voltage stabilization loop, an output over-voltage protection circuit is connected to the output circuit, and an output voltage component is taken out to be input to the PWM controller, and the PWM controller controls the power conversion circuit based on the output information of the voltage stabilization loop and the output over-voltage protection circuit.
Description
Technical field
Patent of the present invention or utility model patent belong to the AC-DC field of switch power.
Background technology
At present; Knownly be used for stand-by power consumption to the AC-DC Switching Power Supply of industrial instrumentation instrument, Medical Devices, computer and communication system, home videos and audio system or the like power supply generally more than 500mW, all stand-by power consumption requirements in the unmet European Community " instruction of EC NO278/2009 energy consumption ".Green energy conservation international standard " instruction of EC NO278/2009 energy consumption " requires: below the power output 90W; Stand-by power consumption is less than 500mW, below the power output 50W; Stand-by power consumption is less than 300mW, and this standard is consistent with the EPS-V2.0 standard-required of the Energy Star of the U.S..International Energy Agency (IEA) was initiated energy-conservation proposal " 1 watt of plan " in 2000 to global electric equipment products production and sales manufacturer; The existing active response that has obtained European Union, the U.S.; Must be reduced to 1 watt to all outlet ports in 2010 to these its stand-by power consumptions of regional electric equipment products, this will become all new non-tariff barriers of electronic product manufacturers that got into and attempted to get into American-European market.
Summary of the invention
Energy-saving and emission-reduction have become the main trend in the whole world; Under this trend, now, the power consumption reduction when move electronic equipment; Normal structure, semiconductor manufacturer are also further at the stand-by power consumption electronic equipment; Saving more energy consumption and fund, green electric power supply demand trend and energy-conservationly become more and more important, traditional control is to satisfy these new demands.A kind of green energy conservation new A C-DC Switching Power Supply is characterized in that: 220VAC interchange input is delivered to lightning protection circuit (1) and is input to EMI circuit (2) then; The output of EMI circuit (2) is sent into current rectifying and wave filtering circuit (3) alternating voltage is carried out rectifying and wave-filtering; Direct voltage behind rectifying and wave-filtering is sent into power conversion circuit (4); The alternating current component of power conversion circuit (4) output outputs to output circuit (6) and delivers to load (7) behind current rectifying and wave filtering circuit (5); Sample circuit (10) is taken a sample to output voltage and is delivered to voltage stabilizing loop (9) and rebuild voltage stabilizing, and output over-voltage protection circuit (11) is sent to PWM controller (8) to outputing to after voltage in the load is taken a sample.PWM controller (8) receives the operating state from the voltage signal power controlling translation circuit (4) of voltage stabilizing loop (9) and output over-voltage protection circuit (11), and power supply is carried out overvoltage, overload, short circuit, error protection.The utility model is that market provides a kind of green energy conservation Switching Power Supply; Select the energy-conservation PWM integrated circuit of novel green for use; Switching Power Supply is carried out again circuit design and PCB design, and this green energy conservation Switching Power Supply satisfies the stand-by power consumption requirement of " instruction of EC NO278/2009 energy consumption " fully.For international and domestic AC-DC application of switching power provides a kind of brand-new green energy conservation scheme.The purpose of the utility model invention is to overcome the defective that exists stand-by power consumption high in the prior art, provides a kind of and has under no-load condition, the product that low-power consumption standby is energy-saving and cost-reducing.
[0004]The utility model comprises following content for solving the new solution that defective adopted that exists in the prior art:
A kind of green energy conservation new A C-DC Switching Power Supply includes lightning protection circuit, EMI circuit, current rectifying and wave filtering circuit, power conversion circuit, output circuit, pwm control circuit, voltage stabilizing loop, sample circuit, current-limiting protection circuit, output over-voltage protection circuit composition.
A kind of green energy conservation new A C-DC Switching Power Supply, said lightning protection circuit, this lightning protection circuit of civil power input, output is connected with the EMI circuit; Current rectifying and wave filtering circuit is delivered in the output of EMI circuit; Direct voltage behind the rectifying and wave-filtering is sent into power conversion circuit; The dc voltage conversion of power conversion circuit after with rectifying and wave-filtering is input to current rectifying and wave filtering circuit for exchanging; Current rectifying and wave filtering circuit is to output to load after direct current is input to output circuit with the power conversion circuit output transform;
Said sample circuit is connected with output circuit, to the output voltage sampling, behind the voltage stabilizing loop, sends into the PWM controller; The output over-voltage protection circuit is connected with output circuit, takes out output voltage component input PWM controller; The PWM controller is controlled power conversion circuit according to the output information of voltage stabilizing loop and output over-voltage protection circuit.
Description of drawings
Fig. 1 green energy conservation new A C-DC Switching Power Supply power supply block diagram.
Fig. 2 green energy conservation new A C-DC Switching Power Supply power supply schematic diagram.
Embodiment
Doing one below in conjunction with instance sets forth in detail.
Fig. 1 is a green energy conservation new A C-DC Switching Power Supply general diagram; 220VAC interchange input is delivered to lightning protection circuit (1) and is input to EMI circuit (2) then in Fig. 1; The output of EMI circuit (2) is sent into current rectifying and wave filtering circuit (3) alternating voltage is carried out rectifying and wave-filtering; Direct voltage behind rectifying and wave-filtering is sent into power conversion circuit (4); The alternating current component of power conversion circuit (4) output outputs to output circuit (6) and delivers to load (7) behind current rectifying and wave filtering circuit (5); Sample circuit (10) is taken a sample to output voltage and is delivered to voltage stabilizing loop (9) and rebuild voltage stabilizing, and output over-voltage protection circuit (11) is sent to PWM controller (8) to outputing to after voltage in the load is taken a sample.PWM controller (8) receives the operating state from the voltage signal power controlling translation circuit (4) of voltage stabilizing loop (9) and output over-voltage protection circuit (11), and power supply is carried out overvoltage, overload, short circuit, error protection.
Green energy conservation new A C-DC Switching Power Supply adopts the double oscillator mode of operation of green pattern; For satisfying the energy-conservation requirement of green pattern or power supply; In green energy conservation new A C-DC Switching Power Supply, selected for use Leadtrend Technology Corp. to have the main control chip LD7575 (IC1) of " variable time control " pattern; Under underloading or idle condition, can reduce switch periods voluntarily or skip some switching pulses or the reduction switching frequency, make it to reach the purpose that stand-by power consumption reduces.
The 220V AC power is through insurance F1 input in Fig. 2; R1, R2, silicon transition absorption diode Z1, thermo-sensitive resistor NTC form the input lightning protection circuit; Being used for transient suppression disturbs; Instantaneous interference signals such as the surge voltage that occurs on the AC network, ringing voltage, sparkover all belong to glitch, be characterized in that action time is extremely short, but voltage amplitude are high, transient energy is big.Glitch can cause the fluctuation of the supply voltage of control system; Be superimposed upon when transient voltage on the input voltage of control system, when making the voltage of input control system surpass the limiting voltage of internal system device, just can damage the inner equipment of control system, therefore must adopt braking measure.
At the one-level EMI filter circuit that the lightning protection circuit back is made up of C1 and LI, high frequency clutter and in-phase interference signal through in the filtering electrical network make out-put supply purer.
Be input to the input of rectification bridge circuit through filtered alternating voltage; After capacitor C 2 filtering, sending into the power conversion circuit of being made up of T1, D2, D3, R6, R7, C4 etc. from the output output of rectification bridge circuit through the direct voltage after the rectification boosts to direct voltage; After power conversion circuit, be connected to the current rectifying and wave filtering circuit that R8, R9, C5, C6, D4, L2 etc. form, the voltage after boosting is carried out outputing to load behind the rectifying and wave-filtering.
IC1 is by the electric current of 3 pin (CS) checkout area effect transistor Q1 in Fig. 2, and it is not only and controls also to peak current that the paired pulses electric current limits.It reaches the adjusting purpose through current signal and voltage signal close-loop feedback.Maximum voltage threshold current induction pin is provided with 0.85v.
5 pin (OUT) of IC1 are output in Fig. 2, and it has 500 mA output and maximum duty cycle is 75% driving force, is used for direct driving power field-effect transistor Q1.
2 pin (COMP) of IC1 are compensation in Fig. 2: voltage feedback signal is taken from output and is added to G1 optocoupler input through resistance R 10, and the signal after light-coupled isolation is added to 2 pin of IC1.When being lower than 1.2v, 2 pin close driving output.When 2 pin were higher than 1.2v, " shut " mode" finished to recover normal operating conditions.Output voltage is added on the reference utmost point pin of IC2 three ends parallel voltage-stabilizing diode able to programme TL431 after resistance R 11 and R19 dividing potential drop; This point voltage is as the reference voltage of electric power output voltage; Stable voltage of IC2 output is to the input of optocoupler G1, and the signal after light-coupled isolation is added to 2 pin of IC1.When if power supply causes output voltage to raise because of some reason; The reference voltage of IC2 will change thereupon; The 2 pin voltages of IC1 also can be along with change; The 5 pin voltages of IC1 can change the operating state of coming power controlling field-effect transistor QI simultaneously, thereby output voltage is turn-offed in the size of control output voltage or unlatching, guarantee that power supply and load are under the safe normal operative condition.
1 pin of IC1 is connected to resistance R 18 in Fig. 2, the size decision oscillator switch frequency of resistance, and normal switch frequency: fsw=(65/RT (k Ω)) * 100 (kHz) general work frequency range is in 50 ~ 130kHz.
Overload protection (OLP): this power supply has realizes protection under overload condition or short-circuit conditions, make that power supply is unlikely to damage.When overload or short circuit occurring, voltage feedback signal is taken from output and is added to G1 optocoupler input through resistance R 10, and the signal after light-coupled isolation is added to 2 pin of IC1.It is saturated that feedback signal will force voltage circuit to get into, thereby draw high voltage compensation pin 2 pin voltages.Surpass 30 milliseconds (as switching frequency 65khz) whenever 2 pin voltages are higher than 5.0v and retention time, the 5 pin driving gates output of IC1 stops, and the switch power circuit will quit work.The millisecond time that postpones is in order to prevent false the triggering and external interference signals control start and turn off process.
Overvoltage protection (OVP): this power supply has over-voltage protecting function.The voltage of output transformer TI secondary induction is sent to 6 pin of IC1 behind R13, D6, C9 rectifying and wave-filtering; When 6 pin voltages (Vcc) are higher than the voltage of threshold value; The output gate driver circuit will be closed, and the 5 pin driving gates output of IC1 stops to make FET Q1 to quit work.This over-voltage protecting function is an automatic recovery type protection, and when 6 pin voltages (Vcc) are lower than the voltage of threshold value, the output gate driver circuit will be opened, and the 5 pin driving gates output of IC1 makes FET Q1 work.
Error protection: this power supply has the various faults defencive function.As long as open circuit, short circuit or RT pin shorted to earth, the suspension of RT pin, the suspension of CS pin appear in the pin of core devices IC1, power drives output will be by protection immediately.
Inner high voltage start-up circuit under-voltage locking (UVLO) function: traditional power supply provides starting current through PDM keyer control starting resistance.Yet, but to consume suitable power on this starting resistance.In theory, this starting resistance can adopt the resistance of high value.Yet high resistance value will cause start-up time longer.The utility model invention is when power initiation, and the high-tension current source after rectification makes electric current provide starting current and Vcc to capacitor C 2 chargings from C1 electric capacity.Starting moment, this voltage is lower than the low-voltage lock threshold, so current source is at supply 1mA electric current.Simultaneously, the low 100 μ A high-tension currents of Vcc connection supply of current charge to capacitor C2.Through using this configuration, no matter under the condition of low pressure or high tension voltage, opening time of delay will be much at one.When Vcc voltage was higher than conduction threshold (UVLO), IC1 further provided gate drive signal, and the high-tension current source is closed by the auxiliary winding TI ' of transformer TI 6 pin through R13, D6 and C9 to IC1 and for it electric current is provided.Therefore, cause the start-up circuit of power loss can eliminate with can realize at an easy rate energy-conservation.
Claims (2)
1. green energy conservation new A C-DC Switching Power Supply; It is characterized in that: 220VAC interchange input is delivered to lightning protection circuit (1) and is input to EMI circuit (2) then; The output of EMI circuit (2) is sent into current rectifying and wave filtering circuit (3) alternating voltage is carried out rectifying and wave-filtering; Direct voltage behind rectifying and wave-filtering is sent into power conversion circuit (4); The alternating current component of power conversion circuit (4) output outputs to output circuit (6) and delivers to load (7) behind current rectifying and wave filtering circuit (5); Sample circuit (10) is taken a sample to output voltage and is delivered to voltage stabilizing loop (9) and rebuild voltage stabilizing; Output over-voltage protection circuit (11) is sent to PWM controller (8) to outputing to after voltage in the load is taken a sample, and PWM controller (8) receives the operating state from the voltage signal power controlling translation circuit (4) of voltage stabilizing loop (9) and output over-voltage protection circuit (11), to power supply implementation overvoltage, overload, short circuit, error protection.
2. a kind of green energy conservation new A C-DC Switching Power Supply according to claim 1; The overvoltage protection that it is characterized in that output voltage has adopted the bleeder circuit of being made up of resistance R 11 and R19, and this dividing point voltage is added on the reference utmost point pin by IC2 three ends parallel voltage-stabilizing diode able to programme TL431 as reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202549912U CN202617006U (en) | 2012-06-01 | 2012-06-01 | Green energy-saving novel AC-DC switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202549912U CN202617006U (en) | 2012-06-01 | 2012-06-01 | Green energy-saving novel AC-DC switch power supply |
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| Publication Number | Publication Date |
|---|---|
| CN202617006U true CN202617006U (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202549912U Expired - Fee Related CN202617006U (en) | 2012-06-01 | 2012-06-01 | Green energy-saving novel AC-DC switch power supply |
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| CN (1) | CN202617006U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786374A (en) * | 2017-02-21 | 2017-05-31 | 广东欧珀移动通信有限公司 | Power circuit, linear power supply and audio frequency apparatus |
-
2012
- 2012-06-01 CN CN2012202549912U patent/CN202617006U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786374A (en) * | 2017-02-21 | 2017-05-31 | 广东欧珀移动通信有限公司 | Power circuit, linear power supply and audio frequency apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170119 Address after: 610052 Sichuan city of Chengdu province Chenghua District two East 3rd Ring Rd section of Longtan Huasheng Industrial Park Road No. 58 building 30 Patentee after: Chengdu aneng Jie Electric Co. Ltd. Address before: Jiulongpo Branch Park four road 400030 Chongqing City No. 166 block C 3F Patentee before: Chongqing Ruisheng Kangbo Electrical Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20180601 |
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| CF01 | Termination of patent right due to non-payment of annual fee |