CN209375470U - A kind of balance modulation switch stabilized voltage power supply - Google Patents
A kind of balance modulation switch stabilized voltage power supply Download PDFInfo
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- CN209375470U CN209375470U CN201920095279.4U CN201920095279U CN209375470U CN 209375470 U CN209375470 U CN 209375470U CN 201920095279 U CN201920095279 U CN 201920095279U CN 209375470 U CN209375470 U CN 209375470U
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- resistance
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- overcurrent protection
- shunt
- opto
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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 balance modulation switch stabilized voltage power supplies, including feed circuit, overcurrent protection chip and transformer, the output end of the feed circuit is connected by shunt resistance with overcurrent protection chip controls end, the output end of the overcurrent protection chip is connected with transformer, the feed circuit includes opto-coupler chip, the control terminal of the opto-coupler chip is connected with filter capacitor, the high resistant end of the opto-coupler chip is connected with first resistor, the output end of the opto-coupler chip is connected separately with first capacitor and second resistance, the control terminal of the overcurrent protection chip also and is connected to shunt capacitance A, the output end of the overcurrent protection chip is connected with field-effect tube, the signal transmitting and receiving end of chip also passes through the voltage-controlled end that the 9th resistance feedback is connected to overcurrent protection chip, power supply is adjusted using primary side feedback, reduce number of elements and drop Low cost reduces switching loss and special stand-by power consumption, avoids the phenomenon that disturbing pulse causes switching tube accidentally to be closed.
Description
Technical field
The utility model relates to regulated power supply field, specially a kind of balance modulation switch stabilized voltage power supply.
Background technique
Switching device is the foundation of power electronics, the development of technology also more high speed, the electricity of various function admirables
Power electronic device has also greatly pushed the development of Switching Power Supply.The 1950s, AM General company had developed first
Triode thyristor, the transformation of electric energy eliminates the reliance on the large scale electrical power units such as alternating current generator, but enters and be made of switching device
The converter epoch.
For the requirement for meeting industrial development, modern switching device is to high frequency, densification, modularization and integrated becomes
Gesture development.And it constantly researches and develops new device or uses new semiconductor material optimised devices function.The MOSET used now due to
With relatively narrow polysilicon lines, thicker grid oxic horizon, lower Channeling implantation is significantly improved work efficiency.
For example, patent name is a kind of switch voltage-stabilizing based on equilibrium modulation circuit application No. is 201420707409.2
Utility model patent:
It forms ON-OFF control circuit using field-effect tube, not only the utility model is made to have boost mode and drop
Die pressing type, so that full voltage range output curent change controls more traditional switching power supply between ± 0.1%
Output curent change control range be greatly improved.
But existing balance modulation switch stabilized voltage power supply has the following deficiencies:
(1) current switching power supply is designed using primary side single-mode, is difficult to meet modern power supply unit
Demand, while stand-by power consumption is relatively high, output voltage circuit structure is also more complicated；
(2) currently, in switching power circuit, there is also the momentary pulse interference problem of certain current waveform rising edge,
The phenomenon that being easy to cause switching tube accidentally to close, this can bring certain damage to switching device itself.
Summary of the invention
In order to overcome the shortcomings of prior art, the utility model provides a kind of balance modulation switch stabilized voltage power supply, adopts
It is adjusted with primary side feedback, reduce number of elements and reduces cost, reduced switching loss and special stand-by power consumption, avoid
The phenomenon that disturbing pulse causes switching tube accidentally to be closed can effectively solve the problem of background technique proposes.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of balance modulation switch stabilized voltage power supply, including feed circuit, overcurrent protection chip and transformer, the feedback electricity
The output end on road is connected by shunt resistance with overcurrent protection chip controls end, the output end of the overcurrent protection chip and change
Depressor is connected, and the feed circuit includes opto-coupler chip, and the control terminal of the opto-coupler chip is connected with filter capacitor, the light
The high resistant end of coupling chip is connected with first resistor, and the output end of the opto-coupler chip is connected separately with first capacitor and the second electricity
Resistance, is set as being connected in parallel between the first capacitor and second resistance, the first capacitor and second resistance and connect branch
It is connected with 3rd resistor, on the other end feedback link to opto-coupler chip of the 3rd resistor, the 3rd resistor also connects respectively
It is connected to the 4th resistance and the 5th resistance, is set as being connected in parallel between the 4th resistance and the 5th resistance, the 4th resistance
Respectively and the 6th resistance and the 7th resistance are connected to the parallel branch of the 5th resistance；
The control terminal of the overcurrent protection chip also and is connected to shunt capacitance A, and the output end of the overcurrent protection chip connects
It is connected to field-effect tube, the source electrode of the field-effect tube respectively and is connected to the first divider resistance, the second divider resistance and third partial pressure
Resistance, the voltage-controlled end of the overcurrent protection chip also pass through the 8th resistance and are connected with shunt resistance, the company of the shunt resistance A
It connects and also passes through the second capacitor at node and be directly grounded, the signal transmitting and receiving end of the overcurrent protection chip also passes through the 9th resistance feedback
It is connected to the voltage-controlled end of overcurrent protection chip, the signal transmitting and receiving end of the overcurrent protection chip also passes through third capacitor and directly connects
Ground.
Further, the 6th resistance and the 7th resistance and connect branch road and be connected with the first voltage-stabiliser tube, described first
For the conduction terminal feedback link of voltage-stabiliser tube to the control terminal of opto-coupler chip, the control terminal of first voltage-stabiliser tube also passes through coupled capacitor
It is connected with opto-coupler chip control terminal.
Further, the input terminal of the transformer and control terminal directly also and are connected to the second voltage-stabiliser tube, first diode
With the tenth resistance, it is set as being connected in series between second voltage-stabiliser tube, first diode and the tenth resistance, the transformer
Control terminal is also connected with transistor, and the collector of the transistor is connected with power supply by shunt resistance B, the transformer it is defeated
Enter end to be also controlled to a power supply by shunt resistance C.
Further, the output branch road of the transformer is serially connected with the second diode, the output branch of the transformer
It is upper also and to be connected to shunt resistance D, shunt capacitance B and shunt capacitance C, the shunt resistance D, shunt capacitance B, shunt capacitance C
And connect branch road and be serially connected with energy storage inductor, the concatenation branch road of the energy storage inductor is simultaneously connected to shunt capacitance D and shunt capacitance E.
Further, the shunt resistance D, shunt capacitance B, shunt capacitance C, shunt capacitance D and shunt capacitance E's is another
End is grounded.
Compared with prior art, the utility model has the beneficial effects that
(1) the balance modulation switch stabilized voltage power supply of the utility model, is adjusted using primary side feedback, and switch tube uses the lowest point
Conducting can greatly reduce switching loss, and entire power circuit design has switch source idling consumption low, and power loss is smaller etc.
Advantage reduces number of elements and reduces cost.
(2) the balance modulation switch stabilized voltage power supply of the utility model can using overcurrent protection chip controls peripheral circuit
The momentary pulse interference for inhibiting primary current waveform rising edge, causes switching tube to miss the phenomenon that closing, benefit to avoid disturbing pulse
With feed circuit come the turn-on time of control switch pipe, thus the process for keeping constant output voltage.
Detailed description of the invention
Fig. 1 is the feed circuit figure of the utility model；
Fig. 2 is the Switching Power Supply main circuit diagram of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As depicted in figs. 1 and 2, the utility model provides a kind of balance modulation switch stabilized voltage power supply, including feed circuit
F, the output end of overcurrent protection chip N1 and transformer T, the feed circuit F pass through shunt resistance R01 and overcurrent protection chip
N1 control terminal is connected, and the output end of the overcurrent protection chip N1 is connect with transformer T-phase, and the feed circuit F includes light
Coupling chip G1, the control terminal of the opto-coupler chip G1 are connected with filter capacitor C11, the high resistant end connection of the opto-coupler chip G1
There is a first resistor R1, the output end of the opto-coupler chip G1 is connected separately with first capacitor C1 and second resistance R2, and described first
It is set as being connected in parallel between capacitor C1 and second resistance R2, the first capacitor C1 and second resistance R2's and meet branch company
It is connected to 3rd resistor R3, on the other end feedback link to opto-coupler chip G1 of the 3rd resistor R3, the 3rd resistor R3 is also
It is connected separately with the 4th resistance R4 and the 5th resistance R5, is set as in parallel between the 4th resistance R4 and the 5th resistance R5 and connects
It connects, the parallel branch of the 4th resistance R4 and the 5th resistance R5 respectively and is connected to the 6th resistance R6 and the 7th resistance R7.
In the present embodiment, using the opto-coupler chip G1 of TCMT1109 model, feed circuit F effect is to carry out output voltage
Sampling controls the conducting that the output of 6 feet carrys out control switch pipe by light-coupled isolation feedback to the end COMP of overcurrent protection chip N1
Time, thus the process for keeping constant output voltage, feed circuit is by the tri- end adjustable reference source LM431 and optocoupler TCMT1109
And partial ohmic, capacitor composition, sampling end resistance the 6th resistance R6 and the 7th resistance R7 is by one big resistance and a small resistance
Error matching is realized in parallel connection, provides constant 2.5V reference voltage to three end adjustable reference sources, to improve the Adjustment precision of circuit,
First capacitor C1 and coupled capacitor C02 plays the role of frequency compensated in circuit.
The control terminal of the overcurrent protection chip N1 also and is connected to shunt capacitance AC01, and the overcurrent protection chip N1's is defeated
Outlet is connected with field-effect tube M1, and the source electrode of the field-effect tube M1 respectively and is connected to the first divider resistance RV1, the second partial pressure electricity
Resistance RV2 and third divider resistance RV3, the voltage-controlled end of the overcurrent protection chip N1 also pass through the 8th resistance R8 and shunt resistance
R01 is connected, and also passes through the second capacitor C2 at the connecting node of the shunt resistance AR01 and is directly grounded, the overcurrent protection core
The signal transmitting and receiving end of piece N1 also passes through the 9th resistance R9 feedback link to the voltage-controlled end of overcurrent protection chip N1, the overcurrent protection
The signal transmitting and receiving end of chip N1 also passes through third capacitor C3 and is directly grounded.
In the present embodiment, overcurrent protection chip N1 uses UCC2800 chip controls peripheral circuit, is able to suppress primary current
The phenomenon that momentary pulse of waveform rising edge is interfered, and causes switching tube accidentally to be closed to avoid disturbing pulse.
The 6th resistance R6 and the 7th resistance R7's and connect branch road and are connected with the first voltage-stabiliser tube V1, first pressure stabilizing
For the conduction terminal feedback link of pipe V1 to the control terminal of opto-coupler chip G1, it is electric that the control terminal of the first voltage-stabiliser tube V1 also passes through coupling
Hold C02 to be connected with opto-coupler chip G1 control terminal.
In the present embodiment, current foldback circuit can protect primary side transformer and switching tube, when current is excessive field-effect
Pipe M1 is closed, and working principle is the electricity when load current overrate or short circuit, in the drain electrode of field-effect tube M1 switching tube
Stream increases, the first divider resistance RV1, the second divider resistance RV2 and third divider resistance RV3 (the first divider resistance RV1, second
Divider resistance RV2 and third divider resistance RV3 are composed in parallel by surface-mount resistor RS1, RS2, RS3, in order to control assembling volume,
A pad is designed as on these three element layouts, three sheet capacitors are built up technique side in parallel by design in technique realization
Method) on Voltage Feedback to overcurrent protection chip N1 3 feet, when the voltage be greater than 1.5V when, pass through chip interior Current amplifier
Device makes conducting width narrow, and declines the output voltage on 6 feet, until making not working for overcurrent protection chip N1, such core
Piece stops output trigger pulse, and power switch tube turns off to protect power tube, and after Failure elimination, power supply automatically restores normal
Work.
The input terminal of the transformer T and control terminal directly also and are connected to the second voltage-stabiliser tube V2, first diode D1 and the
Ten resistance R10, are set as being connected in series between the second voltage-stabiliser tube V2, first diode D1 and the tenth resistance R10, described
The control terminal of transformer T is also connected with transistor M2, and the collector of the transistor M2 is connected with electricity by shunt resistance BR02
Source VCC, the input terminal of the transformer T also pass through shunt resistance CR03 and are connected with power supply VCC, the output of the transformer T
Branch road is serially connected with the output branch road of the second diode D2, the transformer T also and is connected to shunt resistance DR04, shunt capacitance
BC03 and shunt capacitance CC04, the shunt resistance DR04, shunt capacitance BC03, shunt capacitance CC04's and connect branch road go here and there
It is connected to energy storage inductor L, the concatenation branch road of the energy storage inductor L is simultaneously connected to shunt capacitance DC05 and shunt capacitance EC06, described
Shunt resistance DR04, shunt capacitance BC03, shunt capacitance CC04, shunt capacitance DC05 and shunt capacitance EC06 the other end connect
Ground.
In the present embodiment, transformer T has not only acted as the effect of isolation input output, but also can be carried out energy storage.
In the present embodiment, using the switching power circuit of inverse-excitation type, shunt capacitance BC03, shunt capacitance CC04, side are exported
Capacitor DC05 and shunt capacitance EC06 are played a very important role on road, and output voltage waveforms can be made steady, the second voltage-stabiliser tube V2,
The lowest point that first diode D1 selects the range switch period nearest is connected, and when using valley conduction, actual cycle can go out
Existing small-scale fluctuation generates gap with the preset period, this gap is related to the period of resonance, can greatly reduce switch
Loss, entire power circuit design have many advantages, such as that switch source idling consumption is low, and power loss is smaller.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
Claims (5)
1. a kind of balance modulation switch stabilized voltage power supply, including feed circuit (F), overcurrent protection chip (N1) and transformer (T),
Be characterized in that: the output end of the feed circuit (F) is connected by shunt resistance (R01) with overcurrent protection chip (N1) control terminal
It connects, the output end of the overcurrent protection chip (N1) is connected with transformer (T), and the feed circuit (F) includes opto-coupler chip
(G1), the control terminal of the opto-coupler chip (G1) is connected with filter capacitor (C11), the high resistant end connection of the opto-coupler chip (G1)
Having first resistor (R1), the output end of the opto-coupler chip (G1) is connected separately with first capacitor (C1) and second resistance (R2),
It is set as being connected in parallel between the first capacitor (C1) and second resistance (R2), the first capacitor (C1) and second resistance
(R2) and connect branch and be connected with 3rd resistor (R3), the other end feedback link of the 3rd resistor (R3) to opto-coupler chip
(G1) on, the 4th resistance (R4) and the 5th resistance (R5), the 4th resistance is also respectively connected in the 3rd resistor (R3)
(R4) it is set as being connected in parallel between the 5th resistance (R5), the parallel branch of the 4th resistance (R4) and the 5th resistance (R5)
Respectively and it is connected to the 6th resistance (R6) and the 7th resistance (R7)；
The control terminal of the overcurrent protection chip (N1) also and is connected to shunt capacitance A (C01), the overcurrent protection chip (N1)
Output end is connected with field-effect tube (M1), and the source electrode of the field-effect tube (M1) respectively and is connected to the first divider resistance (RV1),
The voltage-controlled end of two divider resistances (RV2) and third divider resistance (RV3), the overcurrent protection chip (N1) also passes through the 8th resistance
(R8) it is connected with shunt resistance (R01), it is straight also passes through the second capacitor (C2) at the connecting node of the shunt resistance A (R01)
Ground connection, the signal transmitting and receiving end of the overcurrent protection chip (N1) also passes through the 9th resistance (R9) feedback link to overcurrent protection core
The voltage-controlled end of piece (N1), the signal transmitting and receiving end of the overcurrent protection chip (N1) also pass through third capacitor (C3) and are directly grounded.
2. a kind of balance modulation switch stabilized voltage power supply according to claim 1, it is characterised in that: the 6th resistance (R6)
With the 7th resistance (R7) and connect branch road and be connected with the first voltage-stabiliser tube (V1), the conduction terminal of first voltage-stabiliser tube (V1) feedback
It is connected to the control terminal of opto-coupler chip (G1), the control terminal of first voltage-stabiliser tube (V1) also passes through coupled capacitor (C02) and light
Coupling chip (G1) control terminal is connected.
3. a kind of balance modulation switch stabilized voltage power supply according to claim 1, it is characterised in that: the transformer (T)
Input terminal and control terminal directly also and are connected to the second voltage-stabiliser tube (V2), first diode (D1) and the tenth resistance (R10), and described the
It is set as being connected in series between two voltage-stabiliser tubes (V2), first diode (D1) and the tenth resistance (R10), the transformer (T)
Control terminal is also connected with transistor (M2), and the collector of the transistor (M2) is connected with power supply by shunt resistance B (R02)
(VCC), the input terminal of the transformer (T) also passes through shunt resistance C (R03) and is connected with power supply (VCC).
4. a kind of balance modulation switch stabilized voltage power supply according to claim 1, it is characterised in that: the transformer (T)
Output branch road is serially connected with the second diode (D2), and the output branch road of the transformer (T) is gone back and is connected to shunt resistance D
(R04), shunt capacitance B (C03) and shunt capacitance C (C04), the shunt resistance D (R04), shunt capacitance B (C03), bypass electricity
Holding C (C04) and connect branch road and be serially connected with energy storage inductor (L), the concatenation branch road of the energy storage inductor (L) is simultaneously connected to bypass electricity
Hold D (C05) and shunt capacitance E (C06).
5. a kind of balance modulation switch stabilized voltage power supply according to claim 4, it is characterised in that: the shunt resistance D
(R04), the other end of shunt capacitance B (C03), shunt capacitance C (C04), shunt capacitance D (C05) and shunt capacitance E (C06) are equal
Ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920095279.4U CN209375470U (en) | 2019-01-21 | 2019-01-21 | A kind of balance modulation switch stabilized voltage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920095279.4U CN209375470U (en) | 2019-01-21 | 2019-01-21 | A kind of balance modulation switch stabilized voltage power supply |
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| Publication Number | Publication Date |
|---|---|
| CN209375470U true CN209375470U (en) | 2019-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920095279.4U Expired - Fee Related CN209375470U (en) | 2019-01-21 | 2019-01-21 | A kind of balance modulation switch stabilized voltage power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114567155A (en) * | 2022-04-29 | 2022-05-31 | 深圳英集芯科技股份有限公司 | Power adapter, overcurrent protection circuit and electronic equipment |
-
2019
- 2019-01-21 CN CN201920095279.4U patent/CN209375470U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114567155A (en) * | 2022-04-29 | 2022-05-31 | 深圳英集芯科技股份有限公司 | Power adapter, overcurrent protection circuit and electronic equipment |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20190910 Termination date: 20220121 |