CN204334332U - Power supply device with auxiliary winding switching circuit - Google Patents
Power supply device with auxiliary winding switching circuit Download PDFInfo
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- CN204334332U CN204334332U CN201420574490.1U CN201420574490U CN204334332U CN 204334332 U CN204334332 U CN 204334332U CN 201420574490 U CN201420574490 U CN 201420574490U CN 204334332 U CN204334332 U CN 204334332U
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- voltage
- auxiliary winding
- electrically connected
- winding
- switching circuit
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- 238000004804 winding Methods 0.000 title claims abstract description 171
- 230000005669 field effect Effects 0.000 claims description 23
- 230000006698 induction Effects 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims 3
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 description 10
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
A power supply device with an auxiliary winding switching circuit comprises a main converter, an auxiliary winding switching circuit and a pulse width modulation controller; the main converter comprises a transformer; the transformer comprises a primary side winding, a secondary side winding and an auxiliary winding; the auxiliary winding includes a first winding and a second winding. According to a secondary side voltage, the first winding induces to generate a first voltage, and the second winding induces to generate a second voltage; the first voltage is greater than the second voltage; when the first voltage is not greater than a preset voltage, the auxiliary winding switching circuit transmits the first voltage to the pulse width modulation controller; when the first voltage is larger than the preset voltage, the auxiliary winding switching circuit transmits the second voltage to the pulse width modulation controller.
Description
Technical field
The utility model relates to a kind of power supply device, particularly a kind of power supply device with auxiliary winding commutation circuit.
Background technology
Power supply device provides power supply to electronic installation, uses drive electronics.If power supply device utilizes USB (universal serial bus) to transmit power supply, then electronic installation can notify the voltage (such as 5 volts or 19.5 volts) of power supply device demand.
Power supply device comprises transformer and controller of pulse width modulation, and transformer comprises primary side winding, auxiliary winding and primary side winding; When the voltage of electronic installation notice power supply device demand, controller of pulse width modulation can change the voltage of primary side winding, and primary side winding is understood the voltage of inductive primary side winding and produces voltage to be sent to electronic installation; Meanwhile, auxiliary winding can inductive secondary side winding voltage and produce voltage and give controller of pulse width modulation to be sent to controller of pulse width modulation with power supply.
When the voltage of demand is 5 volts, the voltage of auxiliary winding induction is still not too large, the voltage that controller of pulse width modulation can directly utilize auxiliary winding to respond to; When the voltage of demand is 19.5 volts, the voltage of auxiliary winding induction namely can be too large, the voltage that controller of pulse width modulation not directly utilizes auxiliary winding to respond to.At a specific embodiment, when the voltage of demand is 5 volts, the voltage of auxiliary winding induction is 20 volts; When the voltage of demand is 19.5 volts, the voltage of auxiliary winding induction is 78 volts.
When the voltage that auxiliary winding is responded to is too large, namely a voltage stabilizing circuit is configured to reduce the voltage of auxiliary winding induction to protect controller of pulse width modulation; But when the voltage of auxiliary winding induction is reduced by voltage stabilizing circuit, namely the energy dissipation of power supply device adds.
Utility model content
For improving the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of power supply device with auxiliary winding commutation circuit.
For reaching above-mentioned purpose, the utility model provides a kind of power supply device with auxiliary winding commutation circuit, and it comprises:
One main transducer;
One auxiliary winding commutation circuit, this auxiliary winding commutation circuit is electrically connected to this main transducer; And
One controller of pulse width modulation, this controller of pulse width modulation is electrically connected to this main transducer and this auxiliary winding commutation circuit,
Wherein this main transducer comprises a transformer; This transformer comprises a primary side winding, a primary side winding and an auxiliary winding, and this auxiliary winding is electrically connected to this auxiliary winding commutation circuit; This auxiliary winding comprises one first winding and one second winding, and this first winding is electrically connected to this auxiliary winding commutation circuit, and this second winding is electrically connected to this auxiliary winding commutation circuit and this first winding;
Wherein this controller of pulse width modulation changes a primary side voltage of this primary side winding; According to this primary side voltage, the induction of this primary side winding is to produce a secondary-side voltage; According to this secondary-side voltage, the induction of this first winding is to produce one first voltage; According to this secondary-side voltage, the induction of this second winding is to produce one second voltage; One number of turn of this first winding is greater than a number of turn of this second winding, and therefore this first voltage is greater than this second voltage;
Wherein when this first voltage is not more than a predeterminated voltage, this auxiliary winding commutation circuit transmits this first voltage to this controller of pulse width modulation, uses and drives this controller of pulse width modulation; When this first voltage is greater than this predeterminated voltage, this auxiliary winding commutation circuit transmits this second voltage to this controller of pulse width modulation, uses and drives this controller of pulse width modulation.
The above-mentioned power supply device with auxiliary winding commutation circuit, wherein this auxiliary winding commutation circuit comprises:
One mos field effect transistor, this mos field effect transistor is electrically connected to this controller of pulse width modulation; And
Zener diode, this Zener diode is electrically connected to this mos field effect transistor.
The above-mentioned power supply device with auxiliary winding commutation circuit, wherein this auxiliary winding commutation circuit more comprises:
One first resistance, this first resistance is electrically connected to this mos field effect transistor;
One first electric capacity, this first electric capacity is electrically connected to this mos field effect transistor; And
One second resistance, this second resistance is electrically connected to this first electric capacity.
The above-mentioned power supply device with auxiliary winding commutation circuit, wherein this auxiliary winding commutation circuit more comprises:
One second electric capacity, this second electric capacity is electrically connected to this mos field effect transistor;
One first diode, this first diode is electrically connected to this mos field effect transistor and this first winding; And
One second diode, this second diode is electrically connected to this mos field effect transistor, this controller of pulse width modulation and this second winding.
The above-mentioned power supply device with auxiliary winding commutation circuit, wherein more comprises:
One primary side filter circuit, this primary side filter circuit is electrically connected to this primary side winding; And
One primary side rectification circuit, this primary side rectification circuit is electrically connected to this primary side filter circuit.
The above-mentioned power supply device with auxiliary winding commutation circuit, wherein more comprises:
One secondary side rectifier circuit, this secondary side rectifier circuit is electrically connected to this primary side winding; And
One primary side filter circuit, this primary side filter circuit is electrically connected to this secondary side rectifier circuit.
The above-mentioned power supply device with auxiliary winding commutation circuit, is applied to an AC power feeding mechanism and an electronic installation, and wherein this power supply device with auxiliary winding commutation circuit more comprises:
One Electromagnetic interference filter, this Electromagnetic interference filter is electrically connected to this primary side rectification circuit and this AC power feeding mechanism.
The above-mentioned power supply device with auxiliary winding commutation circuit, wherein more comprises:
One USB (universal serial bus), this USB (universal serial bus) is electrically connected to this primary side filter circuit and this electronic installation.
The above-mentioned power supply device with auxiliary winding commutation circuit, wherein more comprises:
One switched circuit, this switched circuit is electrically connected to this USB (universal serial bus).
The above-mentioned power supply device with auxiliary winding commutation circuit, wherein more comprises:
One feedback circuit, this feedback circuit is electrically connected to this switched circuit, this primary side filter circuit, this USB (universal serial bus) and this controller of pulse width modulation.
Effect of the present utility model is, reduces the energy dissipation of power supply device and protects controller of pulse width modulation.
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail, but not as to restriction of the present utility model.
Accompanying drawing explanation
Fig. 1 is the power supply device block diagram with auxiliary winding commutation circuit of the present utility model;
Fig. 2 is an embodiment circuit diagram of auxiliary winding commutation circuit of the present utility model.
Wherein, Reference numeral
There is the power supply device 10 of auxiliary winding commutation circuit
AC power feeding mechanism 20
Electronic installation 30
Main transducer 102
Auxiliary winding commutation circuit 104
Controller of pulse width modulation 106
Transformer 108
Primary side winding 110
Auxiliary winding 112
First winding 114
Second winding 116
Primary side winding 118
Primary side filter circuit 120
Primary side rectification circuit 122
Secondary side rectifier circuit 124
Primary side filter circuit 126
Electromagnetic interference filter 128
USB (universal serial bus) 130
Switched circuit 132
Feedback circuit 134
Mos field effect transistor 10402
Zener diode 10404
First resistance 10406
First electric capacity 10408
Second resistance 10410
Second electric capacity 10412
First diode 10414
Second diode 10416
Source electrode 10418
Grid 10420
Drain electrode 10422
Embodiment
Below in conjunction with accompanying drawing, structural principle of the present utility model and operation principle are described in detail:
Please refer to Fig. 1, it is the power supply device block diagram with auxiliary winding commutation circuit of the present utility model.One power supply device 10 with auxiliary winding commutation circuit is applied to AC power feeding mechanism 20 and an electronic installation 30.
This power supply device 10 with auxiliary winding commutation circuit comprises auxiliary winding commutation circuit 104, controller of pulse width modulation 106, primary side filter circuit 120, primary side rectification circuit 122, secondary side rectifier circuit 124, primary side filter circuit 126, Electromagnetic interference filter 128, USB (universal serial bus) 130, switched circuit (Handshake Circuit) 132 of main transducer 102, one and a feedback circuit 134.
This main transducer 102 comprises a transformer 108; This transformer 108 comprises the auxiliary winding 112 of a primary side winding 110, one and a primary side winding 118.This auxiliary winding 112 comprises one first winding 114 and one second winding 116.
This auxiliary winding commutation circuit 104 is electrically connected to this main transducer 102; This controller of pulse width modulation 106 is electrically connected to this main transducer 102 and this auxiliary winding commutation circuit 104; This auxiliary winding 112 is electrically connected to this auxiliary winding commutation circuit 104; This first winding 114 is electrically connected to this auxiliary winding commutation circuit 104; This second winding 116 is electrically connected to this auxiliary winding commutation circuit 104 and this first winding 114.
This primary side filter circuit 120 is electrically connected to this primary side winding 110; This primary side rectification circuit 122 is electrically connected to this primary side filter circuit 120; This secondary side rectifier circuit 124 is electrically connected to this primary side winding 118; This primary side filter circuit 126 is electrically connected to this secondary side rectifier circuit 124; This Electromagnetic interference filter 128 is electrically connected to this primary side rectification circuit 122 and this AC power feeding mechanism 20; This USB (universal serial bus) 130 is electrically connected to this primary side filter circuit 126 and this electronic installation 30; This switched circuit 132 is electrically connected to this USB (universal serial bus) 130; This feedback circuit 134 is electrically connected to this switched circuit 132, this primary side filter circuit 126, this USB (universal serial bus) 130 and this controller of pulse width modulation 106.
Please refer to Fig. 2, it is an embodiment circuit diagram of auxiliary winding commutation circuit of the present utility model.This auxiliary winding commutation circuit 104 comprises a mos field effect transistor 10402, Zener diode 10404,1 first resistance 10406,1 first electric capacity 10408,1 second resistance 10410,1 second electric capacity 10412,1 first diode 10414 and one second diode 10416.
This mos field effect transistor 10402 is electrically connected to this controller of pulse width modulation 106; This Zener diode 10404 is electrically connected to this mos field effect transistor 10402; This first resistance 10406 is electrically connected to this mos field effect transistor 10402; This first electric capacity 10408 is electrically connected to this mos field effect transistor 10402; This second resistance 10410 is electrically connected to this first electric capacity 10408; This second electric capacity 10412 is electrically connected to this mos field effect transistor 10402; This first diode 10414 is electrically connected to this mos field effect transistor 10402 and this first winding 114; This second diode 10416 is electrically connected to this mos field effect transistor 10402, this controller of pulse width modulation 106 and this second winding 116.
In other words, this mos field effect transistor 10402 comprises one source pole 10418, grid 10420 and a drain electrode 10422; This source electrode 10418 is connected to this controller of pulse width modulation 106; The negative electrode of this Zener diode 10404 is connected to this grid 10420, and the anode of this Zener diode 10404 is connected to ground; One end of this first resistance 10406 is connected to this drain electrode 10422, and the other end of this first resistance 10406 is connected to this grid 10420; One end of this first electric capacity 10408 is connected to this drain electrode 10422.
One end of this second resistance 10410 is connected to the other end of this first electric capacity 10408, and the other end of this second resistance 10410 is connected to this grid 10420; One end of this second electric capacity 10412 is connected to this drain electrode 10422, and the other end of this second electric capacity 10412 is connected to ground; The negative electrode of this first diode 10414 is connected to this drain electrode 10422, and the anode of this first diode 10414 is connected to one end of this first winding 114; The negative electrode of this second diode 10416 is connected to this source electrode 10418, and the anode of this second diode 10416 connects the other end of this first winding 114 and one end of this second winding 116; The other end of this second winding 116 is connected to ground.
Please also refer to Fig. 1 and Fig. 2.This electronic installation 30 notifies the voltage (such as 5 volts or 19.5 volts) of this controller of pulse width modulation 106 1 demand by this USB (universal serial bus) 130, this switched circuit 132 and this feedback circuit 134; Therefore, this controller of pulse width modulation 106 changes a primary side voltage of this primary side winding 110; Wherein, this main transducer 102 is a direction flyback converter, and this primary side voltage that this controller of pulse width modulation 106 changes this primary side winding 110 is a prior art, is succinct factor, therefore repeats no more in this.
According to this primary side voltage, this primary side winding 118 is responded to produce a secondary-side voltage; According to this secondary-side voltage, this first winding 114 is responded to produce one first voltage; According to this secondary-side voltage, this second winding 116 is responded to produce one second voltage; One number of turn of this first winding 114 is greater than a number of turn of this second winding 116, and therefore this first voltage is greater than this second voltage.
When this first voltage is not more than a predeterminated voltage, this auxiliary winding commutation circuit 104 transmits this first voltage to this controller of pulse width modulation 106, uses and drives this controller of pulse width modulation 106; When this first voltage is greater than this predeterminated voltage, this auxiliary winding commutation circuit 104 transmits this second voltage to this controller of pulse width modulation 106, uses and drives this controller of pulse width modulation 106.
Wherein, a breakdown voltage (such as 18 volts) of this Zener diode 10404 is for being less than this predeterminated voltage (such as 20 volts); When the voltage of this grid 10420 is greater than the voltage of this source electrode 10418, this mos field effect transistor 10402 meeting conducting; This number of turn of this first winding 114 is 3 times of this number of turn of this second winding 116.
At a specific embodiment, if the voltage of this demand is 5 volts, then this first voltage is 15 volts, and this second voltage is 5 volts; This first voltage (15 volts) is not more than this predeterminated voltage (20 volts), and therefore this auxiliary winding commutation circuit 104 transmits this first voltage to this controller of pulse width modulation 106, uses and drives this controller of pulse width modulation 106.
Wherein, this second voltage (5 volts) is transferred into this source electrode 10418, this first voltage (15 volts) is transferred into this drain electrode 10422, this mos field effect transistor 10402 meeting conducting, therefore this auxiliary winding commutation circuit 104 transmits this first voltage (15 volts) to this controller of pulse width modulation 106.
At another specific embodiment, if the voltage of this demand is 19.5 volts, then this first voltage is 58.5 volts, and this second voltage is 19.5 volts; This first voltage (58.5 volts) is greater than this predeterminated voltage (20 volts), therefore this auxiliary winding commutation circuit 104 transmits this second voltage (19.5 volts) to this controller of pulse width modulation 106, uses and drives this controller of pulse width modulation 106.
Wherein, this second voltage (19.5 volts) is transferred into this source electrode 10418, this first voltage (58.5 volts) is transferred into this drain electrode 10422, the voltage of this grid 10420 is restricted to this breakdown voltage (such as 18 volts) of this Zener diode 10404, the voltage (18 volts) of this grid 10420 is not more than the voltage (19.5 volts) of this source electrode 10418, therefore this mos field effect transistor 10402 can not conducting, therefore this auxiliary winding commutation circuit 104 transmits this second voltage (19.5 volts) to this controller of pulse width modulation 106.
Moreover this mos field effect transistor 10402 above-mentioned can also replace, to reach the function of switch (conducting or not conducting) by bipolar junction transistor.
Effect of the present utility model is the energy dissipation of reduction power supply device and protects controller of pulse width modulation.The energy dissipation of power supply device of the present utility model (comprising this auxiliary winding commutation circuit 104) is low than the energy dissipation of existing power supply device (comprising voltage stabilizing circuit).
Certainly; the utility model also can have other various embodiments; when not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the utility model, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the utility model.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420574490.1U CN204334332U (en) | 2014-09-30 | 2014-09-30 | Power supply device with auxiliary winding switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420574490.1U CN204334332U (en) | 2014-09-30 | 2014-09-30 | Power supply device with auxiliary winding switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204334332U true CN204334332U (en) | 2015-05-13 |
Family
ID=53170641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420574490.1U Expired - Lifetime CN204334332U (en) | 2014-09-30 | 2014-09-30 | Power supply device with auxiliary winding switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204334332U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655824A (en) * | 2016-11-07 | 2017-05-10 | 深圳欧陆通电子有限公司 | Switching power source control circuit and switching power source |
| CN106817026A (en) * | 2015-11-27 | 2017-06-09 | 亚荣源科技（深圳）有限公司 | The assists winding electric supply installation of automatic switchover |
| CN106992659A (en) * | 2016-01-19 | 2017-07-28 | 康舒电子(东莞)有限公司 | The double circuit power supply circuit of power supply changeover device |
| CN116488433A (en) * | 2023-06-21 | 2023-07-25 | 成都智融微电子有限公司 | Auxiliary power supply circuit of switching power supply and control method thereof |
-
2014
- 2014-09-30 CN CN201420574490.1U patent/CN204334332U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106817026A (en) * | 2015-11-27 | 2017-06-09 | 亚荣源科技（深圳）有限公司 | The assists winding electric supply installation of automatic switchover |
| CN106992659A (en) * | 2016-01-19 | 2017-07-28 | 康舒电子(东莞)有限公司 | The double circuit power supply circuit of power supply changeover device |
| CN106655824A (en) * | 2016-11-07 | 2017-05-10 | 深圳欧陆通电子有限公司 | Switching power source control circuit and switching power source |
| CN106655824B (en) * | 2016-11-07 | 2024-01-30 | 深圳欧陆通电子有限公司 | Switching power supply control circuit and switching power supply |
| CN116488433A (en) * | 2023-06-21 | 2023-07-25 | 成都智融微电子有限公司 | Auxiliary power supply circuit of switching power supply and control method thereof |
| CN116488433B (en) * | 2023-06-21 | 2023-09-12 | 成都智融微电子有限公司 | Auxiliary power supply circuit of switching power supply and control method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150513 |
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| CX01 | Expiry of patent term |