CN108134509A - Flyback overcurrent protection power supply - Google Patents
Flyback overcurrent protection power supply Download PDFInfo
- Publication number
- CN108134509A CN108134509A CN201810095167.9A CN201810095167A CN108134509A CN 108134509 A CN108134509 A CN 108134509A CN 201810095167 A CN201810095167 A CN 201810095167A CN 108134509 A CN108134509 A CN 108134509A
- Authority
- CN
- China
- Prior art keywords
- resistance
- diode
- capacitance
- flyback
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005669 field effect Effects 0.000 claims abstract description 22
- 230000005611 electricity Effects 0.000 claims description 11
- 238000004146 energy storage Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of flyback overcurrent protection power supplys; it includes fuse, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first diode, the second diode, the first capacitance, the second capacitance, third capacitance, third field-effect tube, the 4th field-effect tube, transformer etc.; fuse is connected with the first capacitance; first capacitance is connected with first resistor; first capacitance and the second capacitance, 3rd resistor, the 4th capacitance, the second diodes in parallel; third capacitance is connected with the second capacitance, the 4th diode and the second Diode series etc..Circuit of the present invention is simple, makes electric current smooth, repeatedly filters, and eliminates interference.
Description
Technical field
The present invention relates to a kind of power supply, more particularly to a kind of flyback overcurrent protection power supply.
Background technology
In the related application of electronic circuit, its essential part of power supply room, the quality and performance of power supply directly determine
The quality of entire electronic equipment, many places all be unable to do without electronic products, conventional power source conversion effect in our market lives
Rate is low, and output voltage is unstable, and electric current out-of-flatness has interference, generates harmful effect to electronic equipment, shortens electronic product
Service life increases cost.
Invention content
The technical problems to be solved by the invention are to provide a kind of flyback overcurrent protection power supply, and circuit is simple, makes electric current
It is smooth, it repeatedly filters, eliminates interference.
The present invention is to solve above-mentioned technical problem by following technical proposals：A kind of flyback overcurrent protection power supply,
Be characterized in that, including fuse, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance,
7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance, the 12nd resistance, the 13rd resistance, the 14th electricity
Resistance, the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 19th resistance, the first diode, the two or two pole
Pipe, third diode, the 4th diode, the 5th diode, the 6th diode, the 7th diode, the 8th diode, the 9th 2 pole
Pipe, the tenth diode, the 11st diode, the 12nd diode, the first capacitance, the second capacitance, third capacitance, the 4th capacitance,
5th capacitance, the 6th capacitance, the 7th capacitance, the 8th capacitance, the 9th capacitance, the tenth capacitance, the first triode, the second triode,
Third field-effect tube, the 4th field-effect tube, transformer, fuse are connected with the first capacitance, and the first capacitance is connected with first resistor,
First capacitance and the second capacitance, 3rd resistor, the 4th capacitance, the second diodes in parallel, third capacitance are connected with the second capacitance, the
Four diodes and the second Diode series, the first diode and the second diodes in parallel and third diode and the second diode
Series connection, the 5th capacitance and third Diode series, the 4th resistance is in parallel with the 5th capacitance, the 6th capacitance is connected with the 5th capacitance,
5th resistance is connected with the 4th resistance, and the 4th resistance is connected with the 4th field-effect tube source electrode, the 4th fet gate and the 8th
Resistance is connected, and the drain electrode of the 4th field-effect tube is connected with the 5th diode, the 5th diode and the 6th Diode series, the 8th electricity
Resistance and the 8th Diode series, the 9th capacitance and the 8th diodes in parallel, the 7th resistance, the 6th resistance, the series connection of the 8th capacitance, the
Eight capacitances are connected with the 8th pin of transformer, and the 6th diode one end is connected with third field-effect tube source electrode, the 6th diode
The other end is connected with the drain electrode of third field-effect tube, and the 13rd resistance is connected with third fet gate, the 7th diode with
13rd resistance is connected, and the 7th capacitance is connected with the 7th diodes in parallel and the 7th capacitance with the 5th pin of transformer, and the 11st
Resistance, the 12nd resistance are connected with the 7th capacitance, and the 14th resistance is connected with transformer third pin, transformer third pin with
First transistor collector is connected, and the first transistor base is connected with the 19th resistance, the 18th resistance and the 19th resistance string
Connection, the first transistor emitter and the tenth diode are connected, the 11st diode, the 12nd diode and the tenth diode string
Connection, the 9th capacitance are connected with the 9th Diode series and with the second transistor collector, the second transistor base and the 16th electricity
Resistance is connected, and the 16th resistance is connected with the 17th resistance, the tenth capacitance.
Preferably, first diode, the second diode, third diode, the 4th diode composition full-wave rectification bridge.
Preferably, first capacitance is energy storage filter capacitor.
Preferably, the first resistor is NTC thermistor.
Preferably, first triode forms difference amplifier with second triode.
Preferably, the transformer is flyback transformer.
The positive effect of the present invention is：Circuit of the present invention is simple, makes electric current smooth, repeatedly filters, and eliminates interference,
Electronic product service life is improved, reduces cost.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Specific embodiment
Present pre-ferred embodiments are provided below in conjunction with the accompanying drawings, with the technical solution that the present invention will be described in detail.
As shown in Figure 1, flyback overcurrent protection power supply of the present invention includes fuse F1, first resistor R1, second resistance R2, the
Three resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9,
Ten resistance R10, the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R13, the 14th resistance R14, the 15th resistance
R15, the 16th resistance R16, the 17th resistance R17, the 18th resistance R18, the 19th resistance R19, the first diode D1, second
Diode D2, third diode D3, the 4th diode D4, the 5th diode D5, the 6th diode D6, the 7th diode D7,
Eight diode D8, the 9th diode D9, the tenth diode D10, the 11st diode D11, the 12nd diode D12, the first electricity
Hold C1, the second capacitance C2, third capacitance C3, the 4th capacitance C4, the 5th capacitance C5, the 6th capacitance C6, the 7th capacitance C7, the 8th electricity
Hold C8, the 9th capacitance C9, the tenth capacitance C10, the first triode Q1, the second triode Q2, third field-effect tube Q3, the 4th effect
Should pipe Q4, transformer B1, fuse F1 is connected with the first capacitance C1, and the first capacitance C1 is connected with first resistor R1, the first capacitance
C1 is in parallel with the second capacitance C2,3rd resistor R3, the 4th capacitance C4, the second diode D2, third capacitance C3 and the second capacitance C2
Series connection, the 4th diode D4 and the second Diode series, the first diode, D1 be in parallel with the second diode D2 and third diode
D3 connects with the second diode D2, and the 5th capacitance C5 connects with third diode D3, the 4th resistance R4 is in parallel with the 5th capacitance C5,
6th capacitance C6 connects with the 5th capacitance C5, and the 5th resistance R5 connects with the 4th resistance R4, the 4th resistance R4 and the 4th field-effect
Pipe Q4 source electrodes are connected, and the 4th field-effect tube Q4 grids are connected with the 8th resistance R8, the drain electrode and the five or two of the 4th field-effect tube Q4
Pole pipe D5 is connected, and the 5th diode D5 connects with the 6th diode D6, and the 8th resistance R8 connects with the 8th diode D8, the 9th electricity
It is in parallel with the 8th diode D8 to hold C9, the 7th resistance R7, the 6th resistance R6, the 8th capacitance C8 series connection, the 8th capacitance C8 and transformation
The 8th pins of device B1 are connected, and the 6th diode D6 one end is connected with third field-effect tube Q3 source electrodes, and the 6th diode D6's is another
End is connected with the drain electrode of third field-effect tube Q3, and the 13rd resistance R13 is connected with third fet gate Q3, the 7th diode
D7 connects with the 13rd resistance R13, and the 7th capacitance C7 is in parallel with the 7th diode D7 and the 7th capacitance C7 and transformer B1 the 5th
Pin is connected, and the 11st resistance R11, the 12nd resistance R12 connect with the 7th capacitance C7, the 14th resistance R14 and transformer B1
Third pin is connected, and transformer B1 thirds pin is connected with the first triode Q1 collectors, the first triode Q1 base stages and the tenth
Nine resistance R19 are connected, and the 18th resistance R18 connects with the 19th resistance R19, the first triode Q1 emitters and the tenth diode
D10 is connected, and the 11st diode D11, the 12nd diode D12 connect with the tenth diode D10, the 9th capacitance C9 and the 9th
Diode D9 connects and is connected with the second triode Q2 collectors, and the second triode Q2 base stages are connected with the 16th resistance R16, the
16 resistance R16 connect with the 17th resistance R17, the tenth capacitance C10.
First diode, the second diode, third diode, the 4th diode composition full-wave rectification bridge, are improved whole
The efficiency of device is flowed, and rectified current is made to be easy to smooth.
First capacitance is energy storage filter capacitor, and when the circuit is energized, capacitance can store electric energy, when power is off, capacitance
The electric energy of storage can be released, circuit works on.
The first resistor is NTC thermistor, adds in NTC thermistor in circuit, is started equal in input circuit
Shi Tigao input impedance reduces dash current, and when system be in stable state, since NTC thermistor is generated heat, born according to it
Temperature characterisitic, impedance reduce, and so as to which the loss in NTC thermistor also reduces, reduce the overall losses of system.
First triode and second triode form difference amplifier, solve asking for null offset in circuit
Topic.
The transformer be flyback transformer, circuit is simple, makes electric current smooth, thus be suitble to it is multigroup output requirement and
High conversion efficiency when loss is small, transformer turn ratio is smaller, input voltage fluctuates within a large range, still has and relatively stablizes
Output.
Operation principle of the present invention is as follows：Fuse is used for overcurrent protection, and power is more than the rated power of fuse in circuit
When, blown fuse protection circuit prevents circuit burnout, improves safety.First resistor improves input during startup in circuit
Impedance reduces rush of current, according to its negative temperature coefficient, is reduced during the work time in ohmically loss, reduce system
Overall losses, improve power-efficient.Second capacitance, third capacitance are filter capacitor, by alternating current shaping, put down its electric current
Sliding, convenient for the rectification of four diodes in rear, alternating current is changed into direct current, and the 6th capacitance of the 5th capacitance is changed into directly in exchange
After stream, electric current is filtered again, makes electric current smooth, eliminate interference.4th resistance and the 5th resistance prevent open circuit, third
Field-effect tube and the effect of the 4th field-effect tube are identical, contribute to amplify and as constant-current source, have input resistance height, noise
Small, low in energy consumption, dynamic range is big, be easily integrated, without secondary-breakdown phenomenon, safety operation area field width the advantages that.Eight or two pole
Pipe prevents current reflux, and the 9th resistance is not breakdown for dividing the 8th diode of protection, and the 8th capacitance is used to obstruct alternating current
Effect, prevent coils in transformers electromagnetic induction generate electromagnetic field, the first triode, the second triode put power
Greatly, the ten two the ten one the tenth diode prevents current reflux, the 9th capacitance barrier alternating current.
In conclusion circuit of the present invention is simple, make electric current smooth, repeatedly filter, eliminate interference, improve electronic product and use
Service life reduces cost.
Particular embodiments described above, the technical issues of to the solution of the present invention, technical solution and advantageous effect carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to
The present invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection domain of invention.
Claims (6)
1. a kind of flyback overcurrent protection power supply, which is characterized in that it includes fuse, first resistor, second resistance, third electricity
Resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance,
12nd resistance, the 13rd resistance, the 14th resistance, the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance,
19th resistance, the first diode, the second diode, third diode, the 4th diode, the 5th diode, the 6th diode,
7th diode, the 8th diode, the 9th diode, the tenth diode, the 11st diode, the 12nd diode, the first electricity
Appearance, the second capacitance, third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the 8th capacitance, the 9th capacitance,
Ten capacitances, the first triode, the second triode, third field-effect tube, the 4th field-effect tube, transformer, fuse and the first electricity
Hold and be connected, the first capacitance is connected with first resistor, the first capacitance and the second capacitance, 3rd resistor, the 4th capacitance, the second diode
Parallel connection, third capacitance are connected with the second capacitance, the 4th diode and the second Diode series, the first diode and the two or two pole
Pipe parallel connection and third diode and the second Diode series, the 5th capacitance and third Diode series, the 4th resistance and the 5th electricity
Hold in parallel, the 6th capacitance to connect with the 5th capacitance, the 5th resistance is connected with the 4th resistance, the 4th resistance and the 4th field-effect tube source
Extremely it is connected, the 4th fet gate is connected with the 8th resistance, and the drain electrode of the 4th field-effect tube is connected with the 5th diode, and the 5th
Diode and the 6th Diode series, the 8th resistance and the 8th Diode series, the 9th capacitance and the 8th diodes in parallel, the 7th
Resistance, the 6th resistance, the series connection of the 8th capacitance, the 8th capacitance are connected with the 8th pin of transformer, the 6th diode one end and third
Field-effect tube source electrode is connected, and the other end of the 6th diode is connected with the drain electrode of third field-effect tube, the 13rd resistance and third
Fet gate is connected, and the 7th diode is connected with the 13rd resistance, the 7th capacitance and the 7th diodes in parallel and the 7th electricity
Appearance is connected with the 5th pin of transformer, and the 11st resistance, the 12nd resistance are connected with the 7th capacitance, the 14th resistance and transformer
Third pin is connected, and transformer third pin is connected with the first transistor collector, the first transistor base and the 19th resistance
It is connected, the 18th resistance is connected with the 19th resistance, the first transistor emitter and the tenth diode, is connected, the 11st pole
Pipe, the 12nd diode and the tenth Diode series, the 9th capacitance and the 9th Diode series and with the second transistor collector
It is connected, the second transistor base is connected with the 16th resistance, and the 16th resistance is connected with the 17th resistance, the tenth capacitance.
2. flyback overcurrent protection power supply as described in claim 1, which is characterized in that first diode, the second diode,
Third diode, the 4th diode composition full-wave rectification bridge.
3. flyback overcurrent protection power supply as described in claim 1, which is characterized in that first capacitance is energy storage filtered electrical
Hold.
4. flyback overcurrent protection power supply as described in claim 1, which is characterized in that the first resistor is NTC thermistor.
5. flyback overcurrent protection power supply as described in claim 1, which is characterized in that first triode and the described 2nd 3
Pole pipe forms difference amplifier.
6. flyback overcurrent protection power supply as described in claim 1, which is characterized in that the transformer is flyback transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810095167.9A CN108134509A (en) | 2018-01-31 | 2018-01-31 | Flyback overcurrent protection power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810095167.9A CN108134509A (en) | 2018-01-31 | 2018-01-31 | Flyback overcurrent protection power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108134509A true CN108134509A (en) | 2018-06-08 |
Family
ID=62430312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810095167.9A Pending CN108134509A (en) | 2018-01-31 | 2018-01-31 | Flyback overcurrent protection power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108134509A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494702A (en) * | 2019-01-04 | 2019-03-19 | 浙江正泰仪器仪表有限责任公司 | A kind of capacitance protection circuit and power protecting circuit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2899383Y (en) * | 2006-03-23 | 2007-05-09 | 林文献 | Electronic ballast |
| CN201001217Y (en) * | 2007-01-15 | 2008-01-02 | 重庆大学 | LED driving power supply |
| US20100053998A1 (en) * | 2008-08-26 | 2010-03-04 | Sanken Electric Co., Ltd. | Switching power supply device |
| CN102810986A (en) * | 2012-07-13 | 2012-12-05 | 韩腊生 | Series topological light-emitting diode (LED) switching power circuit |
| WO2015131389A1 (en) * | 2014-03-07 | 2015-09-11 | 深圳市众明半导体照明有限公司 | Mr16 type led spotlight and dimming power source thereof |
| DE202016101998U1 (en) * | 2016-04-15 | 2016-05-02 | Zhejiang Twinsel Electronic Technology Co., Ltd. | Control circuit of a switch dimming LED light |
| CN107294393A (en) * | 2017-05-23 | 2017-10-24 | 楚雄医药高等专科学校 | A kind of low cost and high reliability Yi nationality medicine production isolation type switch power |
| CN207853738U (en) * | 2018-01-31 | 2018-09-11 | 常州斯坦博电子科技有限公司 | Flyback overcurrent protection power supply |
-
2018
- 2018-01-31 CN CN201810095167.9A patent/CN108134509A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2899383Y (en) * | 2006-03-23 | 2007-05-09 | 林文献 | Electronic ballast |
| CN201001217Y (en) * | 2007-01-15 | 2008-01-02 | 重庆大学 | LED driving power supply |
| US20100053998A1 (en) * | 2008-08-26 | 2010-03-04 | Sanken Electric Co., Ltd. | Switching power supply device |
| CN102810986A (en) * | 2012-07-13 | 2012-12-05 | 韩腊生 | Series topological light-emitting diode (LED) switching power circuit |
| WO2015131389A1 (en) * | 2014-03-07 | 2015-09-11 | 深圳市众明半导体照明有限公司 | Mr16 type led spotlight and dimming power source thereof |
| DE202016101998U1 (en) * | 2016-04-15 | 2016-05-02 | Zhejiang Twinsel Electronic Technology Co., Ltd. | Control circuit of a switch dimming LED light |
| CN107294393A (en) * | 2017-05-23 | 2017-10-24 | 楚雄医药高等专科学校 | A kind of low cost and high reliability Yi nationality medicine production isolation type switch power |
| CN207853738U (en) * | 2018-01-31 | 2018-09-11 | 常州斯坦博电子科技有限公司 | Flyback overcurrent protection power supply |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494702A (en) * | 2019-01-04 | 2019-03-19 | 浙江正泰仪器仪表有限责任公司 | A kind of capacitance protection circuit and power protecting circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205029930U (en) | Stroboscopic LED driver is removed to wide voltage high efficiency of 9 -48V scope | |
| CN108736702A (en) | Totem non-bridge PFC circuits, power supply change-over device and air conditioner | |
| CN103944435B (en) | Multilevel high-voltage flyback type switch power supply | |
| CN207853738U (en) | Flyback overcurrent protection power supply | |
| CN204578876U (en) | A kind of power driving circuit of AC/DC | |
| CN108134509A (en) | Flyback overcurrent protection power supply | |
| CN204392101U (en) | AC/DC circuit and switching power supply | |
| CN205430668U (en) | LED drive circuit and lighting apparatus | |
| CN104467435A (en) | Balance modulation type multiplex output stabilized voltage supply based on logic protection amplifying circuit | |
| CN207603471U (en) | A kind of switching circuit that power output is improved using single-ended forward type driving circuit | |
| CN103298223A (en) | Step-down piezoelectric transformer driving light-emitting technology method of LED (Light Emitting Diode) and OLED (Organic Light Emitting Diode) | |
| CN209642563U (en) | A kind of massage armchair and its power circuit | |
| CN209593816U (en) | Linear voltage-stabilizing circuit and regulated power supply system | |
| CN201398262Y (en) | Drive circuit of low-voltage alternating current fluorescent lamp | |
| CN204794034U (en) | Input undervoltage protection circuit | |
| CN204031534U (en) | A kind of LED high-power drive circuit | |
| CN202206596U (en) | Stable LED drive power supply | |
| CN203399341U (en) | Novel LED lamp driving power supply | |
| CN104184110B (en) | Overvoltage crowbar | |
| CN207039970U (en) | One kind removes ripple LED drive circuit | |
| CN210016403U (en) | Frequency converter power supply circuit | |
| CN206807813U (en) | Auxiliary power supply circuit, power circuit and micro-wave oven | |
| CN201122905Y (en) | Self-excited oscillating switch power source | |
| CN206879143U (en) | LED power module | |
| CN106132010A (en) | A kind of diode pressure resistant type cold light LED energy-saving electric power circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |