CN205792252U - Reverse exciting switching voltage regulator circuit - Google Patents
Reverse exciting switching voltage regulator circuit Download PDFInfo
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- CN205792252U CN205792252U CN201620475088.7U CN201620475088U CN205792252U CN 205792252 U CN205792252 U CN 205792252U CN 201620475088 U CN201620475088 U CN 201620475088U CN 205792252 U CN205792252 U CN 205792252U
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- terminal
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- voltage regulator
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- switching voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a kind of reverse exciting switching voltage regulator circuit, including transformator, output capacitance and synchronous commutating control circuit.Synchronous commutating control circuit includes bleeder circuit and control chip, wherein the first terminal of bleeder circuit and the second terminal are connected with the first terminal and second terminal of the vice-side winding of transformator respectively, 3rd terminal of bleeder circuit is connected with the first pin of control chip, the first terminal of bleeder circuit is also connected with the first terminal of output capacitance via the first switching tube, and the second terminal of bleeder circuit, second terminal of vice-side winding of transformator and the second terminal of output capacitance are connected to the ground and connect.Reverse exciting switching voltage regulator circuit according to this utility model embodiment has that conversion efficiency is high, stand-by power consumption is low, the compatible advantage such as good of EMI.
Description
Technical field
This utility model relates to circuit field, relates more specifically to a kind of reverse exciting switching voltage regulator circuit.
Background technology
Current era, human society faces the pressure that energy resource consumption is excessive, environmental disruption is serious, energy-conservation
Reduce discharging extremely urgent.In order to reduce the energy resource consumption of electric equipment or electronic product, it is necessary to its power supply
Transducer is optimized, to realize higher conversion efficiency and lower static stand-by power consumption.Medium and small
Power domain, reverse exciting switching voltage regulator circuit because with low cost, design is simple etc., and reason is generally adopted
With.Along with various new standard of energy, the appearance of safety standard, synchronous rectification is progressively applied
In reverse exciting switching voltage regulator circuit.
Utility model content
This utility model provides the reverse exciting switching voltage regulator circuit of a kind of novelty.
Reverse exciting switching voltage regulator circuit according to this utility model embodiment, including transformator, output electricity
Hold and synchronous commutating control circuit.Synchronous commutating control circuit includes bleeder circuit and controls core
Sheet, wherein the first terminal of bleeder circuit and the second terminal respectively with the first of the vice-side winding of transformator
Terminal and the second terminal are connected, and the 3rd terminal of bleeder circuit is connected with the first pin of control chip
Connecing, the first terminal of bleeder circuit is also connected with the first terminal of output capacitance via the first switching tube
Connect, the second terminal of bleeder circuit, second terminal of vice-side winding of transformator and output capacitance
The second terminal be connected to the ground and connect.
Reverse exciting switching voltage regulator circuit according to this utility model embodiment has conversion efficiency merit high, standby
Consume the compatible advantage such as good of low, EMI.
Accompanying drawing explanation
Can be more preferably geographical from description to detailed description of the invention of the present utility model below in conjunction with the accompanying drawings
Solve this utility model, wherein:
Fig. 1 is the circuit diagram of the first example of traditional reverse exciting switching voltage regulator circuit；
Fig. 2 is the circuit diagram of the second example of traditional reverse exciting switching voltage regulator circuit；
Fig. 3 is the circuit diagram of the reverse exciting switching voltage regulator circuit according to first embodiment of the present utility model；
Fig. 4 is the circuit diagram of the reverse exciting switching voltage regulator circuit according to the second embodiment of the present utility model.
Detailed description of the invention
Feature and the exemplary embodiment of this utility model various aspects are described more fully below.Following
Description covers many details, in order to provide comprehensive understanding of the present utility model.But, right
It is readily apparent that this utility model can be to need not these concrete for those skilled in the art
Implement in the case of some details in details.Description to embodiment below is only used to by showing
Go out example of the present utility model and understanding clearer to this utility model is provided.This utility model is never
It is limited to any concrete configuration set forth below, but in the premise without departing from spirit of the present utility model
Under cover coherent element or any amendment of parts, replace and improve.
Fig. 1 is the circuit diagram of the first example of traditional reverse exciting switching voltage regulator circuit.Fig. 2 is traditional
The circuit diagram of the second example of reverse exciting switching voltage regulator circuit.Reverse exciting switching voltage regulator electricity shown in Fig. 1 and 2
Lu Zhongjun includes synchronous rectification scheme, the feedback control of the reverse exciting switching voltage regulator circuit shown in Fig. 1 across
Between the former avris and secondary side of transformator, the feedback control of the reverse exciting switching voltage regulator circuit shown in Fig. 2
System is integrated in the former avris of transformator.Although in the reverse exciting switching voltage regulator circuit shown in Fig. 1 and Fig. 2
Synchronous rectification scheme can promote the efficiency of reverse exciting switching voltage regulator circuit effectively, but in order to control and
Power supply is convenient, and synchronous rectification mos field effect transistor MOSFET is connected to
Ground, this has considerable influence to electromagnetic interference (EMI) radiation, needs extra increase EMI cost.
In view of above one or more problems, propose root based on traditional reverse exciting switching voltage regulator circuit
Reverse exciting switching voltage regulator circuit according to this utility model embodiment.Combine Fig. 3 and 4 separately below, in detail
Reverse exciting switching voltage regulator circuit according to this utility model embodiment is described.
Fig. 3 is the circuit diagram of the reverse exciting switching voltage regulator circuit according to first embodiment of the present utility model.
As it is shown on figure 3, include transformation according to the reverse exciting switching voltage regulator circuit of first embodiment of the present utility model
Device T, output capacitance C1 and synchronous commutating control circuit 302, and synchronous commutating control circuit
302 farther include bleeder circuit 302-1 and control chip 302-2.Wherein, bleeder circuit 302-1
The first terminal and the second terminal respectively with the first terminal (that is, the C end of the vice-side winding of transformator T
Son) and the second terminal (that is, D terminal) be connected, the 3rd terminal and the control of bleeder circuit 302-1
First pin (that is, vin pin) of coremaking sheet 302-2 is connected；The first of bleeder circuit 302-1
Terminal is also connected with the first terminal of output capacitance C1 via the first switching tube MOSFET1, point
Second terminal of volt circuit 302-1, transformator T vice-side winding the second terminal and output electricity
Second terminal of appearance C1 is connected to the ground and connects.
In certain embodiments, the reverse exciting switching voltage regulator circuit shown in Fig. 3 also includes feedback circuit
304.As it is shown on figure 3, the first terminal phase of the first terminal of feedback circuit 304 and output capacitance C1
Connecting, the second terminal of feedback circuit 304 is connected with the primary side winding of transformator T with for control
Second switch pipe MOSFET2 conducting with shutoff control circuit be connected；Feedback circuit 304
Including comparator and optical coupling isolation circuit.
In certain embodiments, the reverse exciting switching voltage regulator circuit shown in Fig. 3 can also include being connected to become
The first terminal (that is, A terminal) of the primary side winding of depressor T and the second terminal (that is, B terminal)
Between absorbing circuit, for for the second switch pipe that is connected with the primary side winding of transformator T
MOSFET2 provides protection.
In certain embodiments, the control chip 302-2 in the reverse exciting switching voltage regulator circuit shown in Fig. 3
Can include following functions foot:
First pin (that is, vin foot), is connected with the 3rd terminal of bleeder circuit 302-1, uses
Voltage between the first terminal and second terminal of the vice-side winding of detecting transformator T；
Second pin (that is, gate foot), is connected with the grid of the first switching tube MOSFET1,
For controlling conducting and the shutoff of the first switching tube MOSFET1；
3rd pin (that is, vd foot), the drain electrode with the first switching tube MOSFET1 or colelctor electrode
It is connected, flows through first size of current of switching tube MOSFET1 and moving back of transformator T for detecting
Magnetic information；
4th pin (that is, vcc foot), is connected with the first terminal of the vice-side winding of transformator T
Connect, for powering for control chip 302-2；And
5th pin (that is, gnd foot), is connected with the first terminal of the vice-side winding of transformator T
Connect, for the reference ground as control chip 302-2.
In certain embodiments, the 3rd pin (that is, vd foot) can be opened via resistance R3 and first
The drain electrode or the colelctor electrode that close pipe MOSFET1 are connected；4th pin (that is, vcc foot) is permissible
It is connected with the first terminal of the vice-side winding of transformator T via power supply electric capacity C2；Second pin
(that is, gate foot) can be connected via the grid of resistance R4 and the first switching tube MOSFET1.
Fig. 4 shows the reverse exciting switching voltage regulator circuit according to the second embodiment of the present utility model.Except
Feedback control in reverse exciting switching voltage regulator circuit shown in Fig. 4 is integrated in beyond transformer primary side, Fig. 4
Other aspects of shown reverse exciting switching voltage regulator circuit and the reverse exciting switching voltage regulator circuit phase shown in Fig. 3
With, therefore repeat no more.
Reverse exciting switching voltage regulator circuit according to this utility model embodiment has conversion efficiency merit high, standby
Consume low, EMI is compatible good and without advantages such as extra power supplies.
This utility model is described above by reference to specific embodiment of the utility model, but this
Skilled person all understands, and these specific embodiments can carry out various amendment, combines and become
More, without departing from the spirit of the present utility model limited by claims or its equivalent and model
Enclose.Additionally, any signal arrows in accompanying drawing should be to be considered merely as exemplary rather than limit
Property, unless otherwise concrete instruction.When term is also contemplated as making ability separately or in combination unclear
Time, the combination of assembly or step also will be considered as to have described.
Claims (7)
1. a reverse exciting switching voltage regulator circuit, including:
Transformator；
Output capacitance；And
Synchronous commutating control circuit, including bleeder circuit and control chip, wherein
The first terminal of described bleeder circuit and the second terminal respectively with the vice-side winding of described transformator
The first terminal and the second terminal are connected, the 3rd terminal of described bleeder circuit and described control chip
First pin is connected,
The first terminal of described bleeder circuit is also via the first end of the first switching tube Yu described output capacitance
Son is connected, the second terminal of described bleeder circuit, second end of vice-side winding of described transformator
Second terminal of son and described output capacitance is connected to the ground and connects.
Reverse exciting switching voltage regulator circuit the most according to claim 1, it is characterised in that described control
Chip includes following pin:
Described first pin, is connected with the 3rd terminal of described bleeder circuit, is used for detecting described change
Voltage between the first terminal and second terminal of the vice-side winding of depressor；
Second pin, is connected with the grid of described first switching tube, is used for controlling described first switch
The conducting of pipe and shutoff；
3rd pin, drain electrode or colelctor electrode with described first switching tube are connected, and are used for detecting stream
Cross the size of current of described first switching tube and the demagnetization information of described transformator；
4th pin, is connected with the first terminal of the vice-side winding of described transformator, for for described
Control chip is powered；And
5th pin, is connected with the first terminal of the vice-side winding of described transformator, for as institute
State the reference ground of control chip.
Reverse exciting switching voltage regulator circuit the most according to claim 2, it is characterised in that the described 3rd
Pin is connected with drain electrode or the colelctor electrode of described first switching tube via the first resistance.
Reverse exciting switching voltage regulator circuit the most according to claim 2, it is characterised in that the described 4th
Pin is connected with the first terminal of the vice-side winding of described transformator via power supply electric capacity.
Reverse exciting switching voltage regulator circuit the most according to claim 2, it is characterised in that described second
Pin is connected via the grid of the second resistance with described first switching tube.
Reverse exciting switching voltage regulator circuit the most according to claim 1, it is characterised in that also include:
Feedback circuit, the first terminal of this feedback circuit is connected with the first terminal of described output capacitance
Connecing, the second terminal of this feedback circuit is connected with the primary side winding of described transformator with for controlling
The conducting of second switch pipe is connected with the control circuit turned off.
Reverse exciting switching voltage regulator circuit the most according to claim 6, it is characterised in that described feedback
Circuit includes comparator and optical coupling isolation circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620475088.7U CN205792252U (en) | 2016-05-23 | 2016-05-23 | Reverse exciting switching voltage regulator circuit |
| TW105211664U TWM533374U (en) | 2016-05-23 | 2016-08-02 | Flyback switching power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620475088.7U CN205792252U (en) | 2016-05-23 | 2016-05-23 | Reverse exciting switching voltage regulator circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205792252U true CN205792252U (en) | 2016-12-07 |
Family
ID=58115546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620475088.7U Active CN205792252U (en) | 2016-05-23 | 2016-05-23 | Reverse exciting switching voltage regulator circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN205792252U (en) |
| TW (1) | TWM533374U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020000844A1 (en) * | 2018-06-25 | 2020-01-02 | 格力电器（武汉）有限公司 | Switching power supply circuit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI663825B (en) * | 2017-12-01 | 2019-06-21 | 宏碁股份有限公司 | Power conversion apparatus and control method |
-
2016
- 2016-05-23 CN CN201620475088.7U patent/CN205792252U/en active Active
- 2016-08-02 TW TW105211664U patent/TWM533374U/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020000844A1 (en) * | 2018-06-25 | 2020-01-02 | 格力电器（武汉）有限公司 | Switching power supply circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM533374U (en) | 2016-12-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |