CN204190621U - A kind of switching power circuit - Google Patents
A kind of switching power circuit Download PDFInfo
- Publication number
- CN204190621U CN204190621U CN201420377996.3U CN201420377996U CN204190621U CN 204190621 U CN204190621 U CN 204190621U CN 201420377996 U CN201420377996 U CN 201420377996U CN 204190621 U CN204190621 U CN 204190621U
- Authority
- CN
- China
- Prior art keywords
- circuit
- pin
- output
- power supply
- power switch
- 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.)
- Expired - Lifetime
Links
- 230000001360 synchronised effect Effects 0.000 claims abstract description 27
- 238000002955 isolation Methods 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 claims description 32
- 238000010586 diagram Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000007850 degeneration Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
Disclose a kind of switching power circuit, comprise: rectification circuit (1), electromagnetic interference filter circuit (2), transformer (3), power switch (4), start-up circuit (5), power supply circuits (6), output filter circuit (7), and feedback circuit (8), wherein, former limit power switch pipe is integrated with in power switch (4), former secondary isolation optocoupler, secondary synchronous rectification switch pipe, pwm chip, and comprise: former limit power switch pin (A), feedback sample pin (B), power supply input pin (C), compensate pin (D), current sample pin (E), chip former limit lower margin (F), synchronous rectification control pin (G), synchronous rectification switch drain electrode pin (H), synchronous rectification switch source electrode pin (I), internal low-voltage difference linear constant voltage regulator input pin (J), chip secondary side lower margin (K), chip secondary side circuit is powered pin (L).According to the utility model, whole power circuit components and parts are few, and integrated level is high, are convenient to realize system high efficiency rate, miniaturization, high reliability.
Description
Technical field
The utility model relates to a kind of switching power circuit, particularly relates to and forms novel high integrated switch power circuit by control chip, rectifier bridge, transformer and simple peripheral circuit.
Background technology
In recent years, the screen of smart mobile phone and panel computer becomes greatly fast, processor accelerates, and is met the requirement of user's extending cell phone and dull and stereotyped computer use time by the battery capacity increasing product.But it is elongated that market and user cannot accept the charging interval, therefore, the power output that must increase charger and adapter is constant or shorten to maintain the charging interval.After power output increases, how to realize low standby, the high efficiency of charger and adapter, development trend that miniaturization becomes power supply product.Current charger and adapter all adopt former limit control program (as shown in Figure 1) substantially, and based on 5V output voltage, power output certainly will cause output current to increase after increasing, if adopt Low V
fschottky diode, then there is overheating failure problem; When load transients loads simultaneously, there is the problem that output voltage falls instantaneously in the control of former limit, if consider that efficiency is with dynamic, then turn increase Power Management Design difficulty again.
Utility model content
The purpose of this utility model is to provide the switching power circuit that solve at least one of above technological difficulties.
According to switching power circuit of the present utility model, comprise: rectification circuit, electromagnetic interference filter circuit, transformer, power switch, start-up circuit, power supply circuits, output filter circuit, and feedback circuit, the output of described rectification circuit is connected with the input of electromagnetic interference filter circuit, the output of described electromagnetic interference filter circuit and the former limit winding switching of transformer, the vice-side winding of described transformer is connected with the input of output filter circuit, the auxiliary winding of described transformer and the input of described feedback circuit, the input of described power supply circuits connects, described start-up circuit is connected between the output of described electromagnetic interference filter circuit and described power switch, former limit power switch pipe is integrated with in described power switch, former secondary isolation optocoupler, secondary synchronous rectification switch pipe, pwm chip, and comprise: former limit power switch pin, be connected with the former limit winding of described transformer, feedback sample pin, is connected with the output of described feedback circuit, power supply input pin, is connected with the output of described power supply circuits, compensate pin, be connected with loop compensation circuit, current sample pin, is connected to the ground via current sense resistor, for detecting primary side current of transformer,
Chip former limit lower margin, ground connection; Synchronous rectification control pin, is connected via the vice-side winding of resistance with described transformer; Synchronous rectification switch drain electrode pin, is connected with the vice-side winding of described transformer; Synchronous rectification switch source electrode pin (I), with the output of described Switching Power Supply be connected; Internal low-voltage difference linear constant voltage regulator input pin, is connected with the output of described switching power circuit; Chip secondary side lower margin), be connected to secondary side and control with reference to ground; Chip secondary side circuit is powered pin, is connected to ground via electric capacity.
In switching power circuit of the present utility model, preferably, former limit power switch pipe is pliotron, and former limit power switch pin is the collector electrode pin of pliotron, and start-up circuit is connected between the output of electromagnetic interference filter circuit and the power supply input pin of power switch.
In switching power circuit of the present utility model, preferably, former limit power switch pipe is MOSFET, and former limit power switch pin is the drain electrode pin of MOSFET, and start-up circuit is connected between the output of electromagnetic interference filter circuit and the power supply input pin of power switch.
In switching power circuit of the present utility model, preferably, start-up circuit comprises multiple starting resistance, power supply circuits comprise rectifier diode and electric capacity, multiple starting resistance is connected in series between the output of electromagnetic interference filter circuit and the power supply input pin of power switch, rectifier diode the input of just very power supply circuits, the negative pole of rectifier diode is the output of power supply circuits, one end of electric capacity is connected and other end ground connection with the output of power supply circuits, and the output of power supply circuits is connected to the power supply input pin of power switch.
In switching power circuit of the present utility model, preferably, former limit power switch pipe is MOSFET, and former limit power switch pin is the drain electrode pin of MOSFET,
Power switch also comprises the grid pin of MOSFET, and start-up circuit is connected between the output of electromagnetic interference filter circuit and the grid pin of power switch.
In above-mentioned switching power circuit, preferably, start-up circuit comprises multiple starting resistance, power supply circuits comprise rectifier diode and electric capacity, multiple starting resistance is connected in series between the output of electromagnetic interference filter circuit and the grid pin of power switch, the input of the just very power supply circuits of rectifier diode, the negative pole of rectifier diode is the output of power supply circuits, one end of electric capacity is connected and other end ground connection with the output of power supply circuits, and the output of power supply circuits is connected to the power supply input pin of power switch.
In switching power circuit of the present utility model, preferably, switching power circuit also comprises overshoot absorbing circuit, and overshoot absorbing circuit is across the two ends of the former limit winding at transformer.
In switching power circuit of the present utility model, preferably, secondary synchronous rectification switch pipe is power MOSFET.
According to the utility model, whole power circuit components and parts are few, and integrated level is high, are convenient to realize system high efficiency rate, miniaturization, high reliability.
Accompanying drawing explanation
The utility model can be understood better in the description of embodiment of the present utility model below in conjunction with accompanying drawing, wherein:
Fig. 1 is the block diagram that former limit control program is shown;
Fig. 2 is the block diagram that the utility model control program is shown;
Fig. 3 is the circuit diagram of the embodiment 1 that utility model is shown;
Fig. 4 is the exploded view of the circuit diagram of embodiment 1 as shown in Figure 3;
Fig. 5 is the figure of the different connections that electromagnetic interface filter is shown;
Fig. 6 is the figure that start-up circuit involved by embodiment 1, the common connection of power supply circuits are shown;
Fig. 7 is the circuit diagram that embodiment 2 of the present utility model is shown;
Fig. 8 be start-up circuit involved by embodiment 2 is shown, figure that power supply circuits start connection fast;
Fig. 9 is the figure that the different connection of output filter circuit is shown;
Figure 10 is the figure of the connection that overshoot absorbing circuit is shown.
Embodiment
The characteristic sum exemplary embodiment of the utility model various aspects will be described in detail below.Description below covers many details, to provide complete understanding of the present utility model.But, it will be apparent to one skilled in the art that the utility model can be implemented when not needing some details in these details.Below the description of embodiment is only used to by illustrating example of the present utility model to provide to the clearer understanding of the utility model.Any concrete configuration that the utility model proposes below being never limited to, but under the prerequisite not departing from spirit of the present utility model, cover any amendment of coherent element or parts, replacement and improvement.
Fig. 2 is the block diagram that the utility model control program is shown.
As shown in Figure 2, switching power circuit of the present utility model comprises: bridge rectifier (1), electromagnetic interference (EMI) filter circuit (2), start-up circuit (5), transformer (3), feedback circuit (8), power supply circuits (6), power switch (4), absorbing circuit (9) and output filter circuit (7).
The output of rectification circuit (1) is connected with the input of electromagnetic interference filter circuit (2), the output of electromagnetic interference filter circuit (2) and the former limit winding switching of transformer (3), the vice-side winding of transformer (3) is connected with the input of output filter circuit (7), the auxiliary winding of transformer (3) is connected with the input of the input of feedback circuit (8), power supply circuits (6), and start-up circuit (5) is connected between the output of electromagnetic interference filter circuit (2) and power switch (4).
Power switch (4) adopts former limit control program, the auxiliary balancing boom device of inner integrated former limit power switch pipe, light-coupled isolation, output synchronous rectification switch pipe and necessity.
The utility model provides so a kind of flyback power supply application circuit: realize former limit, secondary energy transferring by transformer; Constant voltage, current constant control is realized by feedback circuit; Dynamic controlling is realized by light-coupled isolation; By exporting synchronous rectification, improve system effectiveness; Integrated by the height of control switch, save system components and parts, be conducive to system high efficiency rate and miniaturization.
Embodiment 1
Fig. 3 is the circuit diagram of the embodiment 1 that utility model is shown.
In the present embodiment 1, for ease of setting forth content of the present utility model, be described for the inverse-excitation type switch power-supply for mobile telephone external charger as shown in Figure 3, but the utility model coverage is never only limitted to following instance application.
As shown in Figure 3, the circuit structure of this inverse-excitation type switch power-supply is isolated form inverse-excitation type switch power-supply circuit, and this inverse-excitation type switch power-supply circuit adopts former limit control realization charger and adapter constant voltage, constant current and exports synchronous rectification and controls.
Fig. 4 is the exploded view of the circuit diagram of embodiment 1 as shown in Figure 3.
This switch flyback switch circuit mainly comprises: AC input rectifying 1, electromagnetic interference (EMI) filter circuit 2, flyback switch transformer 3, power switch 4, start-up circuit 5, power supply circuits 6, output filter circuit 7, feedback sample circuit 8, overshoot absorbing circuit 9.
AC input rectifying 1 comprises: fuse FUSE, rectifier diode, and Main Function carries out rectification to alternating voltage.The quantity of rectifier diode can be minimum one, maximum eight.Fuse also can replace with fuse resistance, wire resistor or inductance.The output of AC input rectifying 1 is connected with EMI filter circuit 2.
EMI filter circuit 2 comprises: inductance, high-voltage electrolytic capacitor and esd discharge resistance, and Main Function suppresses electromagnetic interference (EMI) and rectification post filtering.According to different application, inductance can with two, also may with a common mode inductance; High-voltage electrolytic capacitor can only with one; Esd discharge resistance R1 also can in some occasion.The output of EMI filter circuit 2 and the former limit winding switching of flyback switch transformer 3.
Fig. 5 is the various connections of electromagnetic interface filter, and R1 is esd discharge resistance, can serial or parallel connection to reach required resistance, also can cancel.
Flyback switch transformer 3 comprises: former limit winding, vice-side winding and auxiliary winding.The two ends of the former limit winding of flyback switch transformer 3 are connected with overshoot absorbing circuit 9.The vice-side winding of flyback switch transformer 3 is connected with the input of output filter circuit 7.The auxiliary winding of flyback switch transformer 3 is connected with the input of the input of feedback sample circuit 8, power supply circuits 6.
Power switch 4 comprises: the peripheral auxiliary element of the isolation of built-in former limit power switch pipe, pwm chip, former secondary optocoupler, secondary synchronous rectification switch pipe and necessity.Former limit power switch pipe is MOSFET or pliotron, and secondary synchronous rectification switch pipe is power MOSFET.
As shown in Figure 4, in the present embodiment 1, power switch 4 is control chips (not according to pin position order) with following 12 function pin:
Drain (or collector electrode C of the pliotron) pin of A: former limit power switch pipe MOSFET, is connected with the former limit winding of flyback switch transformer 3;
B: feedback sample pin, for detecting output voltage, is connected with the output of feedback sample circuit 8;
C: power supply input pin, starts for chip power supply, be connected with the output of start-up circuit 5 with power supply circuits 6;
D: loop compensation pin, external loop compensation circuit, for improving degeneration factor loop response and stability, this loop compensation circuit can be electric capacity;
E: current sample pin, for detecting primary side current of transformer, is connected with current sense resistor R41;
F: chip former limit lower margin, is connected to the reference ground of chip former limit control circuit;
G: synchronous rectification control pin, detects input for synchronous rectification, is connected via resistance R42 with the vice-side winding of transformer 3;
H: the Drain pin of synchronous rectification switch pipe, is connected with the vice-side winding of transformer 3;
I: synchronous rectification switch source electrode pin, with output be connected;
J: inner LDO (low pressure difference linear voltage regulator) input pin, is connected with the output of switching power circuit;
K: chip secondary side lower margin, is connected to chip secondary side and controls with reference to ground;
L: chip secondary side circuit is powered pin, is connected to ground via external electric capacity Cvcc.
Start-up circuit 5 and power supply circuits 6: comprise starting resistance, rectifier diode, electric capacity, more specifically, start-up circuit 5 comprises starting resistance R2, R3, and power supply circuits 6 comprise rectifier diode D6 and electric capacity C4.
According to different supply power mode, start-up circuit and power supply circuits may have different connected modes, in embodiment 1, adopt common Starting mode as shown in Figure 6.
In common Starting mode, the output of start-up circuit and power supply circuits is connected to the power supply input pin of power switch 4 (VDD PIN).
Specifically, the negative pole of rectifier diode D6 is the output of power supply circuits 6, and one end of electric capacity C4 is connected and other end ground connection with the output of power supply circuits 6, and the output of power supply circuits 6 is connected to the power supply input pin C of power switch 4.Starting resistance R2, R3 are connected in series between the output of electromagnetic interference filter circuit 2 and the power supply input pin C of power switch 4.
Output rectifier and filter 7 comprises: filter capacitor and output dummy load two parts.For different output ripple requirements, output filter circuit can increase π type filter circuit or common mode filtering circuit.Several frequently seen connection as shown in Figure 8 can also be included but not limited between output rectifier and filter 7AB 2.
Feedback sample circuit 8 receives the input of assisting winding from transformer, and comprises divider resistance, and for detecting output voltage information, its output is connected with the feedback sample pin of power switch 4.
Overshoot absorbing circuit 9 comprises absorption resistance, Absorption Capacitance and unilateral diode three part, and its output is connected with the DRAIN pin (or collector electrode C of pliotron) of the former limit power switch pipe MOSFET of power switch 4.Several frequently seen connection as shown in Figure 9 can also be included but not limited between overshoot absorbing circuit 9AB 2.
Embodiment 2
Inverse-excitation type switch power-supply circuit can also adopt other forms of circuit connecting.
In example 2, as shown in Figure 7, the circuit connecting of start-up circuit 5, power supply circuits 6, feedback sample circuit 8 is different from embodiment 1.In addition, the former limit power switch pipe of power switch 4 is MOSFET, and power switch 4 also has grid (GATE) pin.As shown in Figure 7, start-up circuit 5 is connected between the output of electromagnetic interference filter circuit 2 and the grid pin of power switch 4.Other formations are identical with embodiment 1, thus omit repeat specification.
In example 2, start-up circuit 5 and power supply circuits 6 comprise starting resistance, rectifier diode D6 and start-up capacitance C4, and more particularly, start-up circuit 5 comprises starting resistance R2, R3, and power supply circuits 6 comprise rectifier diode D6 and electric capacity C4.
In the present embodiment 2, adopt the connected mode of quick Starting mode as shown in Figure 8.
In quick Starting mode, starting resistance R2, R3 are connected to grid (GATE) pin of power switch, inner to VDD charging through power switch, and the input from auxiliary winding powers to after rectifier diode D6, electric capacity C4 filtering the VDD of power switch.
Specifically, starting resistance R2, R3 are connected in series between the output of electromagnetic interference filter circuit 2 and the grid pin of power switch 4.
The input of the just very power supply circuits 6 of rectifier diode D6, the negative pole of rectifier diode D6 is the output of power supply circuits 6, one end of electric capacity C4 is connected and other end ground connection with the output of power supply circuits 6, and the output of power supply circuits 6 is connected to the power supply input pin C of power switch 4.
As shown in Figure 7, in the present embodiment 2, power switch 4 is control chips (not according to pin position order) with following 13 function pin:
The Drain pin of former limit power switch pipe MOSFET, is connected with the former limit winding of flyback switch transformer 3;
Feedback sample pin, for detecting output voltage, is connected with the output of feedback sample circuit 8;
Power supply input pin, starts for chip power supply, is connected with the output of power supply circuits 6;
The GATE pin of former limit power switch pipe MOSFET, is connected with the output of start-up circuit 5;
Loop compensation pin, external loop compensation circuit, for improving degeneration factor loop response and stability, this loop compensation circuit can be electric capacity;
Current sample pin, for detecting primary side current of transformer, is connected with current sense resistor R41;
Chip former limit lower margin, is connected to the reference ground of chip former limit control circuit;
Synchronous rectification control pin, detects input for synchronous rectification, is connected via resistance R42 with the vice-side winding of transformer 3;
The Drain pin of synchronous rectification switch pipe, is connected with the vice-side winding of transformer 3;
Synchronous rectification switch source electrode pin, with output be connected;
Inner LDO (low pressure difference linear voltage regulator) input pin, is connected with the output of switching power circuit;
Chip secondary side lower margin, is connected to chip secondary side and controls with reference to ground;
Chip secondary side circuit is powered pin, is connected to ground via external electric capacity Cvcc.
Below the utility model is described with reference to specific embodiment of the utility model, but those skilled in the art all understand, various amendment, combination and change can be carried out to these specific embodiments, and the spirit and scope of the present utility model by claims or its equivalents can not be departed from.In addition, any signal arrows in accompanying drawing should be considered to be only exemplary, instead of restrictive, indicates unless otherwise specifically.When term be also contemplated as the ability of separation or combination is not known time, the combination of assembly or step also will be considered to describe.
Claims (8)
1. a switching power circuit, is characterized in that, comprising:
Rectification circuit (1), electromagnetic interference filter circuit (2), transformer (3), power switch (4), start-up circuit (5), power supply circuits (6), output filter circuit (7) and feedback circuit (8)
The output of described rectification circuit (1) is connected with the input of electromagnetic interference filter circuit (2),
The output of described electromagnetic interference filter circuit (2) and the former limit winding switching of transformer (3),
The vice-side winding of described transformer (3) is connected with the input of output filter circuit (7),
The auxiliary winding of described transformer (3) is connected with the input of the input of described feedback circuit (8), described power supply circuits (6),
Described start-up circuit (5) is connected between the output of described electromagnetic interference filter circuit (2) and described power switch (4),
Be integrated with former limit power switch pipe, the isolation of former secondary optocoupler, secondary synchronous rectification switch pipe, pwm chip in described power switch (4), and comprise:
Former limit power switch pin (A), is connected with the former limit winding of described transformer (3);
Feedback sample pin (B), is connected with the output of described feedback circuit (8);
Power supply input pin (C), is connected with the output of described power supply circuits (6);
Compensate pin (D), be connected with loop compensation circuit;
Current sample pin (E), is connected to the ground, for detecting primary side current of transformer via current sense resistor (R41);
Chip former limit lower margin (F), ground connection;
Synchronous rectification control pin (G), is connected with the vice-side winding of described transformer via another resistance (R42) being different from described current sense resistor (R41);
Synchronous rectification switch drain electrode pin (H), is connected with the vice-side winding of described transformer;
Synchronous rectification switch source electrode pin (I), with the output of described switching power circuit be connected;
Internal low-voltage difference linear constant voltage regulator input pin (J), is connected with the output of described switching power circuit;
Chip secondary side lower margin (K), is connected to secondary side and controls with reference to ground;
Chip secondary side circuit is powered pin (L), is connected to ground via electric capacity (Cvcc).
2. switching power circuit as claimed in claim 1, is characterized in that,
Described former limit power switch pipe is pliotron, and described former limit power switch pin (A) is the collector electrode pin of described pliotron,
Described start-up circuit (5) is connected between the output of described electromagnetic interference filter circuit (2) and the power supply input pin (C) of described power switch (4).
3. switching power circuit as claimed in claim 1, is characterized in that,
Described former limit power switch pipe is MOSFET, and described former limit power switch pin (A) is the drain electrode pin of described MOSFET,
Described start-up circuit (5) is connected between the output of described electromagnetic interference filter circuit (2) and the power supply input pin (C) of described power switch (4).
4. switching power circuit as claimed in claim 2 or claim 3, is characterized in that,
Described start-up circuit (5) comprises multiple starting resistance (R2, R3),
Described power supply circuits (6) comprise rectifier diode (D6) and electric capacity (C4),
Described multiple starting resistance (R2, R3) is connected in series between the output of described electromagnetic interference filter circuit (2) and the described power supply input pin (C) of described power switch (4),
Described rectifier diode (D6) the input of just very power supply circuits (6), the negative pole of described rectifier diode (D6) is the output of described power supply circuits (6), one end of described electric capacity (C4) is connected and other end ground connection with the output of described power supply circuits (6), and the output of described power supply circuits (6) is connected to the described power supply input pin (C) of described power switch (4).
5. switching power circuit as claimed in claim 1, is characterized in that,
Described former limit power switch pipe is MOSFET, and described former limit power switch pin (A) is the drain electrode pin of described MOSFET,
Described power switch (4) also comprises the grid pin of described MOSFET,
Described start-up circuit (5) is connected between the output of described electromagnetic interference filter circuit (2) and the grid pin of described power switch (4).
6. switching power circuit as claimed in claim 4, is characterized in that,
Described start-up circuit (5) comprises multiple starting resistance (R2, R3),
Described power supply circuits (6) comprise rectifier diode (D6) and electric capacity (C4),
Described multiple starting resistance (R2, R3) is connected in series between the output of described electromagnetic interference filter circuit (2) and the described grid pin of described power switch (4),
The input of the just very power supply circuits (6) of described rectifier diode (D6), the negative pole of described rectifier diode (D6) is the output of described power supply circuits (6), one end of described electric capacity (C4) is connected and other end ground connection with the output of described power supply circuits (6), and the output of described power supply circuits (6) is connected to the described power supply input pin (C) of described power switch (4).
7.
asswitching power circuit according to claim 1, is characterized in that, also comprises overshoot absorbing circuit (9), and described overshoot absorbing circuit (9) is across the two ends of the former limit winding at described transformer (3).
8. switching power circuit as claimed in claim 1, is characterized in that,
Described secondary synchronous rectification switch pipe is power MOSFET.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420377996.3U CN204190621U (en) | 2014-07-09 | 2014-07-09 | A kind of switching power circuit |
| TW103217775U TWM507117U (en) | 2014-07-09 | 2014-10-06 | Switching power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420377996.3U CN204190621U (en) | 2014-07-09 | 2014-07-09 | A kind of switching power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204190621U true CN204190621U (en) | 2015-03-04 |
Family
ID=52622591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420377996.3U Expired - Lifetime CN204190621U (en) | 2014-07-09 | 2014-07-09 | A kind of switching power circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN204190621U (en) |
| TW (1) | TWM507117U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958834A (en) * | 2016-06-28 | 2016-09-21 | 南京比恩机电科技有限公司 | High-voltage high-frequency pulse electrostatic precipitation power supply anti-interference control system and method |
| CN106604468A (en) * | 2016-12-29 | 2017-04-26 | 生迪智慧科技有限公司 | Led lamp |
| CN106783099A (en) * | 2017-03-30 | 2017-05-31 | 深圳创维数字技术有限公司 | A kind of transformer and power supply adaptor |
| CN106953533A (en) * | 2017-03-22 | 2017-07-14 | 合肥惠科金扬科技有限公司 | Flyback power supply circuit and electrical equipment |
| CN109980917A (en) * | 2017-12-27 | 2019-07-05 | 中国科学院声学研究所 | A kind of power supply unit suitable for seabed observation network constant pressure repeater or splitter |
| CN110554255A (en) * | 2018-05-30 | 2019-12-10 | 华为技术有限公司 | transformer testing method and related device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI569564B (en) * | 2015-11-27 | 2017-02-01 | 通嘉科技股份有限公司 | Switching mode power supplies with fast load-transient response |
| EP3413429B1 (en) | 2016-02-05 | 2021-02-24 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Adapter and charging control method |
| JP6633104B2 (en) * | 2016-07-26 | 2020-01-22 | オッポ広東移動通信有限公司 | Adapter and charge control method |
| TWI605674B (en) * | 2017-02-14 | 2017-11-11 | 通嘉科技股份有限公司 | Control circuit for compensating output loss of a power converter and method thereof |
-
2014
- 2014-07-09 CN CN201420377996.3U patent/CN204190621U/en not_active Expired - Lifetime
- 2014-10-06 TW TW103217775U patent/TWM507117U/en unknown
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958834A (en) * | 2016-06-28 | 2016-09-21 | 南京比恩机电科技有限公司 | High-voltage high-frequency pulse electrostatic precipitation power supply anti-interference control system and method |
| CN105958834B (en) * | 2016-06-28 | 2018-08-07 | 南京比恩机电科技有限公司 | High voltage high frequency bursts static dust-removing power antidisturbance control system and method |
| CN106604468A (en) * | 2016-12-29 | 2017-04-26 | 生迪智慧科技有限公司 | Led lamp |
| CN106604468B (en) * | 2016-12-29 | 2018-06-26 | 生迪智慧科技有限公司 | LED light |
| CN106953533A (en) * | 2017-03-22 | 2017-07-14 | 合肥惠科金扬科技有限公司 | Flyback power supply circuit and electrical equipment |
| CN106783099A (en) * | 2017-03-30 | 2017-05-31 | 深圳创维数字技术有限公司 | A kind of transformer and power supply adaptor |
| CN109980917A (en) * | 2017-12-27 | 2019-07-05 | 中国科学院声学研究所 | A kind of power supply unit suitable for seabed observation network constant pressure repeater or splitter |
| CN110554255A (en) * | 2018-05-30 | 2019-12-10 | 华为技术有限公司 | transformer testing method and related device |
| CN110554255B (en) * | 2018-05-30 | 2022-04-22 | 华为数字能源技术有限公司 | Transformer testing method and related device |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM507117U (en) | 2015-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204190621U (en) | A kind of switching power circuit | |
| CN202004649U (en) | Switching power supply circuit with flyback structure | |
| CN211508677U (en) | Balance-free charger | |
| CN204131210U (en) | Power supply switch circuit and portable electric appts | |
| CN103607009A (en) | Charging and discharging circuit with automatic protecting function | |
| CN111509825A (en) | 45W broadband voltage self-adaptation PPS super portable power source structure that fills soon | |
| CN202004650U (en) | Switch power supply circuit of flyback structure | |
| CN106655431B (en) | Automatic current regulation charger circuit | |
| CN205544520U (en) | Automatic energy -conserving charging circuit of pressure regulating | |
| US20230208279A1 (en) | Active diode circuit and ac/dc power conversion circuit | |
| CN201869103U (en) | Variable-voltage power supply | |
| CN102299629A (en) | Power supply control method and power supply device for direct-current high-voltage power supply | |
| CN203326888U (en) | Light-load and high-efficiency novel-type adapter power supply | |
| CN104426220A (en) | Voltage regulation circuit | |
| CN107069912A (en) | A kind of USB interface-based adaptive quick-charging circuit | |
| CN202696482U (en) | Power supply circuit for leakage circuit breaker | |
| CN212210576U (en) | Power supply circuit of low-power-consumption storage battery charger | |
| CN204068742U (en) | Low-power power adapter drive circuit | |
| CN210273531U (en) | Charging circuit, charging equipment and terminal | |
| CN204442186U (en) | Inverse-excitation type switch power-supply circuit | |
| CN204578369U (en) | Inverse-excitation type switch power-supply circuit | |
| CN203457045U (en) | A DC-to-DC converter | |
| CN203071828U (en) | Fly-back switching power supply circuit | |
| CN202818113U (en) | Fly-back switch power supply circuit | |
| CN206180666U (en) | Charging circuit and charger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150304 |