CN106899198B - A kind of feedback winding multiplex circuit of high frequency transformer - Google Patents
A kind of feedback winding multiplex circuit of high frequency transformer Download PDFInfo
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- CN106899198B CN106899198B CN201710201207.9A CN201710201207A CN106899198B CN 106899198 B CN106899198 B CN 106899198B CN 201710201207 A CN201710201207 A CN 201710201207A CN 106899198 B CN106899198 B CN 106899198B
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- 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
- 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
-
- 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
- H02M1/36—Means for starting or stopping converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
A kind of feedback winding multiplex circuit of high frequency transformer, is related to the technical field and field of switch power of electronic circuit；Including high frequency transformer, absorb freewheeling circuit, multiplexing functions circuit, charging and overvoltage crowbar；Wherein, the pin 1 of high frequency transformer is connect with freewheeling circuit is absorbed；Freewheeling circuit is absorbed to connect with the cathode of diode D6；The pin 2 of high frequency transformer is connect with absorption freewheeling circuit, external metal-oxide-semiconductor respectively；The pin 6 of the pin 5 of high frequency transformer and high frequency transformer with multiplexing functions circuit connection；After multiplexing functions circuit is connect with charging and overvoltage crowbar, it is connect with external power supply；The present invention, which is realized, is multiplexed with different functions for same skeleton road, makes under the premise of not changing skeleton, meets the requirement of circuit power, and circuit is built simple and reliable, and the area for occupying pcb board is smaller, meets the requirement of Switching Power Supply miniaturization.
Description
Technical field
The present invention relates to a kind of technical field of electronic circuit and field of switch power, especially a kind of high frequency transformer
Feedback winding multiplex circuit.
Background technique
The rough direction of Switching Power Supply can be summarized as the following at present
(1) it minimizes, slimming, lightweight.Volume, the weight of Switching Power Supply are mainly to be determined by energy-storage travelling wave tube, because
The miniaturization of this Switching Power Supply actually reduces the volume of wherein energy-storage travelling wave tube as far as possible.
(2) high frequency.In a certain range, the raising of switching frequency can effectively inhibit to interfere, improve the dynamic of system
Can, therefore high frequency is the main direction of development of Switching Power Supply.
(3) high reliability.Decades of times more than the component that Switching Power Supply is used than continuous work power supply,
(4) noise is low.The shortcomings that Switching Power Supply first is that noise is big, merely pursue high frequency, noise can also increase therewith
Greatly.
High frequency transformer is the power transformer that working frequency is more than intermediate frequency (10kHz), is mainly used for high frequency switch power
In make high-frequency switch power transformer, also have for making supply transformer as driving circuit in frequency converter.In Switching Power Supply
In, high frequency transformer is an important component, its size, and volume also determines the volume size of entire Switching Power Supply.
And the specifications and models of the watt level of transformer and coil current-carrying capacity, skeleton and magnetic core have relationship, so in the change of same grade
In depressor, how to reduce the volume of transformation is very crucial problem.If number is inadequate, just at present on the existing skeleton of technology
Skeleton size is only modified, increases the number of pins of skeleton, thus virtually increases the size of transformer.The increasing of transformer
The waste for having led to entire Switching Power Supply space greatly, increases the plate suqare of PCB.The hair of the miniaturization of Switching Power Supply is violated
Open up direction, while the research and development cost also greatly increased.
If number is inadequate at present on the existing skeleton of technology, skeleton size is just only modified, the number of pins of skeleton is increased
Add, thus virtually increases the size of transformer.The increase of transformer has led to the waste in entire Switching Power Supply space,
Increase the plate suqare of PCB.The research and development having violated the developing direction of the miniaturization of Switching Power Supply, while having also greatly increased at
This.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency of the prior art, the feedback winding for providing a kind of high frequency transformer is multiple
With circuit, realizes and same skeleton road is multiplexed with different functions, make under the premise of not changing skeleton, meet circuit power
Requirement, and circuit is built simple and reliable, and the area for occupying pcb board is smaller, meets the requirement of Switching Power Supply miniaturization.
Above-mentioned purpose of the invention is achieved by following technical solution:
A kind of feedback winding multiplex circuit of high frequency transformer, including high frequency transformer, absorption freewheeling circuit, multiplexing functions
Circuit, charging and overvoltage crowbar, diode D2 and diode D6；The high frequency transformer includes 12 pins, respectively
Pin 1-12；Wherein, the pin 1 of high frequency transformer is connect with freewheeling circuit is absorbed；Absorb the yin of freewheeling circuit and diode D6
Pole connection；The pin 2 of high frequency transformer is connect with absorption freewheeling circuit, external metal-oxide-semiconductor respectively；The pin 3 of high frequency transformer with
The anode of diode D2 connects；The cathode of diode D2 is connect with external electrical appliance；The pin 4 of high frequency transformer and external electricity consumption
Device connection；The pin 6 of the pin 5 of high frequency transformer and high frequency transformer with multiplexing functions circuit connection；Multiplexing functions circuit
After being connect with charging and overvoltage crowbar, it is connect with the cathode of diode D6；The anode of diode D6 is connect with external power supply；
The pin 7-12 of high frequency transformer is connect with external electrical appliance.
In a kind of feedback winding multiplex circuit of above-mentioned high frequency transformer, the high frequency transformer pin multiplexing circuit is also
Including diode D7, diode D8 and diode D9；Wherein, the pin 11 of the anode of diode D7 and high frequency transformer connects,
The cathode of diode D7 is connect with external electrical appliance；The anode of diode D8 and the pin 9 of high frequency transformer connect, diode D8
Cathode connect with external electrical appliance；The pin 7 of the anode of diode D9 and high frequency transformer connects, the cathode of diode D9 with
External electrical appliance connection.
In a kind of feedback winding multiplex circuit of above-mentioned high frequency transformer, the pin 1 and high frequency of the high frequency transformer
The pin 2 of transformer is inputted in a manner of primary side winding；The pin 3 of the high frequency transformer and the pin 4 of high frequency transformer are with pair
The output of side winding method；The pin 5 of the high frequency transformer and the pin 6 of high frequency transformer are exported in a manner of vice-side winding；Institute
The pin 8 of the pin 7 and high frequency transformer of stating high frequency transformer is exported in a manner of vice-side winding；The pin of the high frequency transformer
9 and the pin 10 of high frequency transformer exported in a manner of vice-side winding；The pin 11 of the high frequency transformer and high frequency transformer
Pin 12 is exported in a manner of vice-side winding.
In a kind of feedback winding multiplex circuit of above-mentioned high frequency transformer, the absorption freewheeling circuit include capacitor C1,
Diode D1, resistance R1 and resistance R2；Wherein, the pin 1 of one end of capacitor C1 and high frequency transformer connects；Capacitor C1's is another
End is connect with the cathode of diode D1, R1 respectively；One end of resistance R2 and the pin 1 of high frequency transformer connect；Resistance R2's is another
One end is connect with one end of resistance R1；The other end of resistance R1 is connect with the cathode of diode D1.
In a kind of feedback winding multiplex circuit of above-mentioned high frequency transformer, the multiplexing functions circuit includes diode
D3, diode D4, diode D5, capacitor C3, resistance R6 and LED light；Wherein, the pipe of the anode of diode D3 and high frequency transformer
Foot 5 connects；The cathode of diode D3 is connect with charging and overvoltage crowbar；The anode of diode D4 and the pipe of high frequency transformer
Foot 5 connects；The cathode of diode D4 is connect with capacitor C3, while the cathode of diode D4 is connect with one end of resistance R6, resistance
The other end of R6 and the anode of LED light connect；The cathode of LED light is connect with the other end of capacitor C3；The anode of diode D5 with
The pin 5 of high frequency transformer connects；The cathode of diode D5 is connect with capacitor C3.
In a kind of feedback winding multiplex circuit of above-mentioned high frequency transformer, the charging and overvoltage crowbar include electricity
Hinder R3, resistance R4, resistance R5, capacitor C2 and zener diode Z1；Wherein, the cathode of one end of resistance R3 and diode D6 connect
It connects；The other end of resistance R3 is connect with one end of resistance R4；The other end of resistance R4 is connect with one end of resistance R5；Resistance R5's
The other end is connect with one end of capacitor C2；The other end of capacitor C2 is connect with the anode of zener diode Z1；Zener diode Z1
Cathode and multiplexing functions circuit connection.
In a kind of feedback winding multiplex circuit of above-mentioned high frequency transformer, the diode D6 is counnter attack diode.
In a kind of feedback winding multiplex circuit of above-mentioned high frequency transformer, the diode D2, diode D3, two poles
Pipe D4, diode D5, diode D7, diode D8 and diode D9 are supper-fast recovery diode.
The invention has the following advantages over the prior art:
(1) it present invention employs the mode of skeleton pin multiplexing, realizes under the premise of not changing skeleton size, improves
The service performance of circuit power, and circuit is built simple and reliable, and the area for occupying pcb board is smaller, be particluarly suitable for PCB
Size requirements are higher and require small occasion to use on skeleton；
(2) present invention employs functional reduction circuits, realize the multiplexing of skeleton pin, improve skeleton utilization rate and
The area for reducing PCB, meets small form factor requirements；
(3) present invention employs absorb freewheeling circuit.Realize the function of burr in the function and absorbing circuit of current stream
Can, improve the stability of Switching Power Supply；
(4) present invention employs charging and protecting circuit, the function of adjustable starting time is realized, while to voltage mistake
Height is protected, and the safety of Switching Power Supply is improved.
Detailed description of the invention
Fig. 1 is feedback winding multiplex circuit schematic diagram of the present invention.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments:
The present invention provides a kind of feedback winding multiplex circuit design of high frequency transformer, realizes the small-sized of Switching Power Supply
Change, lightweight is multiplexed the pin of high frequency transformer under the premise of not changing skeleton size, and reaching transformer can be real
Existing function, builds circuit diagram.
As shown in Figure 1 it is feedback winding multiplex circuit schematic diagram, has figure it is found that a kind of feedback winding of high frequency transformer is multiple
With circuit, including high frequency transformer, absorb freewheeling circuit, multiplexing functions circuit, charging and overvoltage crowbar, diode D2 and
Diode D6；The high frequency transformer includes 12 pins, respectively pin 1-12；Wherein, the pin 1 of high frequency transformer and suction
Receive freewheeling circuit connection；Freewheeling circuit is absorbed to connect with the cathode of diode D6；The pin 2 of high frequency transformer is continuous with absorption respectively
Current circuit, external metal-oxide-semiconductor connection；The pin 3 of high frequency transformer is connect with the anode of diode D2；The cathode of diode D2 and outer
The connection of portion's electrical appliance；The pin 4 of high frequency transformer is connect with external electrical appliance；The pin 5 and high frequency transformer of high frequency transformer
Pin 6 with multiplexing functions circuit connection；After multiplexing functions circuit is connect with charging and overvoltage crowbar, with diode D6
Cathode connection；The anode of diode D6 is connect with external power supply；The pin 7-12 of high frequency transformer connects with external electrical appliance
It connects.Wherein, counnter attack diode D6 will meet the voltage requirement of input voltage, if too small can be such that D6 burns, and forward direction electric conduction
Pressure is small as far as possible, and conducting electric current wants coincident circuit to require, and avoids damaging D6 because of overcurrent and heat.
Wherein, high frequency transformer pin multiplexing circuit further includes diode D7, diode D8 and diode D9；Wherein, two
The anode of pole pipe D7 and the pin 11 of high frequency transformer connect, and the cathode of diode D7 is connect with external electrical appliance；Diode D8
Anode and the pin 9 of high frequency transformer connect, the cathode of diode D8 is connect with outside electrical appliance；The anode of diode D9 with
The pin 7 of high frequency transformer connects, and the cathode of diode D9 is connect with external electrical appliance.
The pin 1 of high frequency transformer and the pin 2 of high frequency transformer are inputted in a manner of primary side winding；The high frequency transformer
Pin 3 and the pin 4 of high frequency transformer exported in a manner of vice-side winding；The pin 5 and high frequency transformation of the high frequency transformer
The pin 6 of device is exported in a manner of vice-side winding；The pin 8 of the pin 7 of the high frequency transformer and high frequency transformer with secondary side around
Group mode exports；The pin 9 of the high frequency transformer and the pin 10 of high frequency transformer are exported in a manner of vice-side winding；The height
The pin 11 of frequency power transformer and the pin 12 of high frequency transformer are exported in a manner of vice-side winding.
Absorbing freewheeling circuit includes capacitor C1, diode D1, resistance R1 and resistance R2；Wherein, one end of capacitor C1 and height
The pin 1 of frequency power transformer connects；The other end of capacitor C1 is connect with the cathode of diode D1, R1 respectively；One end of resistance R2 with
The pin 1 of high frequency transformer connects；The other end of resistance R2 is connect with one end of resistance R1；The other end and diode of resistance R1
The cathode of D1 connects.
Multiplexing functions circuit includes diode D3, diode D4, diode D5, capacitor C3, resistance R6 and LED light；Wherein,
The anode of diode D3 and the pin 5 of high frequency transformer connect；The cathode of diode D3 is connect with charging and overvoltage crowbar；
The anode of diode D4 and the pin 5 of high frequency transformer connect；The cathode of diode D4 is connect with capacitor C3, while diode D4
Cathode connect with one end of resistance R6, the anode of the other end of resistance R6 and LED light connects；The cathode and capacitor C3 of LED light
The other end connection；The anode of diode D5 and the pin 5 of high frequency transformer connect；The cathode and capacitor C3 of diode D5 connects
It connects.
Charging and overvoltage crowbar include resistance R3, resistance R4, resistance R5, capacitor C2 and zener diode Z1；Wherein,
One end of resistance R3 is connect with the cathode of diode D6；The other end of resistance R3 is connect with one end of resistance R4；Resistance R4's is another
One end is connect with one end of resistance R5；The other end of resistance R5 is connect with one end of capacitor C2；The other end of capacitor C2 and pressure stabilizing
The anode of diode Z1 connects；The cathode and multiplexing functions circuit connection of zener diode Z1.Wherein, resistance R3, resistance R4, electricity
Hinder R5, capacitor C2 it has to be ensured that charging energy, while to guarantee that circuit reduces to the greatest extent in ohmically power loss, simultaneously
In the case where guaranteeing above-mentioned requirements, the starting of circuit can be changed by the size of modification resistance or capacitance
Time.The selection ratio 15V-VCC of Z1 in circuit is larger, and is less than the maximum value of rear stage power circuit input, main
It wants to play the role of protecting rear stage circuit.
Diode D2, diode D3, diode D4, diode D5, diode in feedback winding multiplex circuit of the present invention
D7, diode D8 and diode D9 are supper-fast recovery diode, and the forward direction conducting voltage of diode is sufficiently small, forward direction conducting
Electric current meets the power requirement of electrical appliance.Guarantee that the power loss on diode is sufficiently small, while making the service life of diode
It is more permanent.
When circuit start work, prevention diode D6 adds DC voltage, and voltage is charged by R3, R4, R5 to capacitor C2,
When being charged to control chip starting voltage, control chip starting sends out PWM wave, controls the switch of metal-oxide-semiconductor；When metal-oxide-semiconductor is opened,
The 3 of transformer framework, 5 pins export the waveform of certain duty ratio, by rectifier diode, are rectified into desired voltage value, are
Meet the requirement of engineering upper housing, pcb board to be done as small as possible, could put into shell, so diode D3, D4, D5
5 pins of concurrent multiplexing transformer framework realize different functions, and D3, which rectifies out, to be continued to power to control chip, and D4, D5
Rectification comes out, and gives other load supplyings.Pay attention to due to this pin multiplexing, so having to guarantee that multiplexing coil is wrapped in skeleton
On enameled wire current-carrying capacity, when selecting rectifier diode, due to being high frequency switch power.The switching frequency of power supply all exists
100KHz or more is so have to select fast recovery diode, while, the forward direction electric conduction of diode more efficient in order to make
Pressure wants as small as possible, guarantees lesser conduction loss, and forward direction conducting electric current will meet load requirement.For charging resistor and fill
Capacitor, two parameter matchings, in that case it can be decided that the starting time of Switching Power Supply, the selection for charging resistor are had to full
Sufficient power requirement, resistance value requirement, and guarantee that energy consumption on it is sufficiently small, to guarantee the efficiency of Switching Power Supply, for filling
The selection of capacitor will select sufficiently large capacitance on the basis of guaranteeing the Switching Power Supply starting time, and carrying out energy storage is control
Chip power supply.By the design, while not increasing skeleton size, the area requirements of PCB are met, make Switching Power Supply more
Miniaturization, slimming, lightweight.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (4)
1. a kind of feedback winding multiplex circuit of high frequency transformer, it is characterised in that: including high frequency transformer, absorb afterflow electricity
Road, multiplexing functions circuit, charging and overvoltage crowbar, diode D2 and diode D6；The high frequency transformer includes 12
Pin, respectively pin 1-12；Wherein, the pin 1 of high frequency transformer is connect with freewheeling circuit is absorbed；Absorb freewheeling circuit and two
The cathode of pole pipe D6 connects；The pin 2 of high frequency transformer is connect with absorption freewheeling circuit, external metal-oxide-semiconductor respectively；High frequency transformer
Pin 3 connect with the anode of diode D2；The cathode of diode D2 is connect with external electrical appliance；The pin 4 of high frequency transformer
It is connect with external electrical appliance；The pin 6 of the pin 5 of high frequency transformer and high frequency transformer with multiplexing functions circuit connection；Function
After energy multiplex circuit is connect with charging and overvoltage crowbar, it is connect with the cathode of diode D6；The anode of diode D6 and outer
The connection of portion's power supply；The pin 7-12 of high frequency transformer is connect with external electrical appliance；
The high frequency transformer pin multiplexing circuit further includes diode D7, diode D8 and diode D9；Wherein, diode D7
Anode and the pin 11 of high frequency transformer connect, the cathode of diode D7 is connect with outside electrical appliance；The anode of diode D8
It is connect with the pin 9 of high frequency transformer, the cathode of diode D8 is connect with external electrical appliance；The anode and high frequency of diode D9 becomes
The pin 7 of depressor connects, and the cathode of diode D9 is connect with external electrical appliance；
The pin 1 of the high frequency transformer and the pin 2 of high frequency transformer are inputted in a manner of primary side winding；The high frequency transformer
Pin 3 and the pin 4 of high frequency transformer exported in a manner of vice-side winding；The pin 5 and high frequency transformation of the high frequency transformer
The pin 6 of device is exported in a manner of vice-side winding；The pin 8 of the pin 7 of the high frequency transformer and high frequency transformer with secondary side around
Group mode exports；The pin 9 of the high frequency transformer and the pin 10 of high frequency transformer are exported in a manner of vice-side winding；The height
The pin 11 of frequency power transformer and the pin 12 of high frequency transformer are exported in a manner of vice-side winding；
The absorption freewheeling circuit includes capacitor C1, diode D1, resistance R1 and resistance R2；Wherein, one end of capacitor C1 and height
The pin 1 of frequency power transformer connects；The other end of capacitor C1 is connect with the cathode of diode D1, R1 respectively；One end of resistance R2 with
The pin 1 of high frequency transformer connects；The other end of resistance R2 is connect with one end of resistance R1；The other end and diode of resistance R1
The cathode of D1 connects；
The multiplexing functions circuit includes diode D3, diode D4, diode D5, capacitor C3, resistance R6 and LED light；Its
In, the anode of diode D3 and the pin 5 of high frequency transformer connect；The cathode of diode D3 and charging and overvoltage crowbar connect
It connects；The anode of diode D4 and the pin 5 of high frequency transformer connect；The cathode of diode D4 is connect with capacitor C3, while two poles
The cathode of pipe D4 is connect with one end of resistance R6, and the other end of resistance R6 and the anode of LED light connect；The cathode and electricity of LED light
Hold the other end connection of C3；The anode of diode D5 and the pin 5 of high frequency transformer connect；The cathode and capacitor C3 of diode D5
Connection.
2. a kind of feedback winding multiplex circuit of high frequency transformer according to claim 1, it is characterised in that: the charging
And overvoltage crowbar includes resistance R3, resistance R4, resistance R5, capacitor C2 and zener diode Z1；Wherein, one end of resistance R3
It is connect with the cathode of diode D6；The other end of resistance R3 is connect with one end of resistance R4；The other end and resistance R5 of resistance R4
One end connection；The other end of resistance R5 is connect with one end of capacitor C2；The other end of capacitor C2 and the sun of zener diode Z1
Pole connection；The cathode and multiplexing functions circuit connection of zener diode Z1.
3. a kind of feedback winding multiplex circuit of high frequency transformer according to claim 1, it is characterised in that: described two
Pole pipe D6 is counnter attack diode.
4. a kind of feedback winding multiplex circuit of high frequency transformer according to claim 1, it is characterised in that: described two
Pole pipe D2, diode D3, diode D4, diode D5, diode D7, diode D8 and diode D9 are ultrafast two pole of quick-recovery
Pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201207.9A CN106899198B (en) | 2017-03-30 | 2017-03-30 | A kind of feedback winding multiplex circuit of high frequency transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201207.9A CN106899198B (en) | 2017-03-30 | 2017-03-30 | A kind of feedback winding multiplex circuit of high frequency transformer |
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| Publication Number | Publication Date |
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| CN106899198A CN106899198A (en) | 2017-06-27 |
| CN106899198B true CN106899198B (en) | 2019-04-09 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2775928Y (en) * | 2004-12-17 | 2006-04-26 | 康佳集团股份有限公司 | Switch power capable of correcting power factor |
| CN201590919U (en) * | 2009-11-30 | 2010-09-22 | Bcd半导体制造有限公司 | High-power factor high-performance LED driving circuit |
| CN202005042U (en) * | 2011-04-07 | 2011-10-05 | 昂宝电子（上海）有限公司 | Novel light-emitting diode (LED) drive circuit with high power factor |
| CN204030996U (en) * | 2014-05-26 | 2014-12-17 | 昂宝电子（上海）有限公司 | A kind of reverse exciting switching voltage regulator circuit |
| CN104426353A (en) * | 2013-08-27 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Switching power circuit, lighting device, and charger |
-
2017
- 2017-03-30 CN CN201710201207.9A patent/CN106899198B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2775928Y (en) * | 2004-12-17 | 2006-04-26 | 康佳集团股份有限公司 | Switch power capable of correcting power factor |
| CN201590919U (en) * | 2009-11-30 | 2010-09-22 | Bcd半导体制造有限公司 | High-power factor high-performance LED driving circuit |
| CN202005042U (en) * | 2011-04-07 | 2011-10-05 | 昂宝电子（上海）有限公司 | Novel light-emitting diode (LED) drive circuit with high power factor |
| CN104426353A (en) * | 2013-08-27 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Switching power circuit, lighting device, and charger |
| CN204030996U (en) * | 2014-05-26 | 2014-12-17 | 昂宝电子（上海）有限公司 | A kind of reverse exciting switching voltage regulator circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106899198A (en) | 2017-06-27 |
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