CN109862648A - A kind of double-transistor flyback formula LED drive power - Google Patents
A kind of double-transistor flyback formula LED drive power Download PDFInfo
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- CN109862648A CN109862648A CN201711238104.6A CN201711238104A CN109862648A CN 109862648 A CN109862648 A CN 109862648A CN 201711238104 A CN201711238104 A CN 201711238104A CN 109862648 A CN109862648 A CN 109862648A
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- transformer
- double
- power supply
- power
- transistor flyback
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of double-transistor flyback formula LED drive power, the present invention is made it be worked as far as possible in synchronous regime, is reduced energy loss using two switching tubes in isolating transformer scheme driving double-transistor flyback converter.To filter out power input electromagnetic interference, input terminal electromagnetic interface filter is devised.By analyzing the working condition of flyback transformer, in conjunction with actual demand, the transformer parameter of power supply actual use.Due to leakage inductance to double-transistor flyback formula converter there are larger harm, when illustrating coiling transformer, reduce the Part Methods of transformer leakage inductance.
Description
Technical field
The present invention relates to semiconductor fields, wherein a kind of involved double-transistor flyback formula LED drive power.
Background technique
With the growing tension of global energy, energy conservation and environmental protection is increasingly valued by people.Electric consumption on lighting is that electric energy disappears
One important component of consumption, the energy consumption reduced in illumination have great significance.LED(Light Emitting
Diode, LED) as generally acknowledged forth generation light source, have long service life, photoelectric conversion efficiency high, safe, environmentally protective etc.
Advantage.Since LED is relatively high to driving power requirement, at present, LED drive power becomes the bottleneck for restricting LED development.
Summary of the invention
The present invention to solve the above-mentioned problems, to provide a kind of double-transistor flyback formula LED drive power.
The present invention makes it work as far as possible using two switching tubes in isolating transformer scheme driving double-transistor flyback converter
In synchronous regime, energy loss is reduced.To filter out power input electromagnetic interference, input terminal electromagnetic interface filter.By analyzing flyback
The working condition of formula transformer devises the transformer parameter of power supply actual use in conjunction with actual demand.Since leakage inductance is to two-tube
Inverse excitation type converter when illustrating coiling transformer, reduces the Part Methods of transformer leakage inductance there are larger harm.
Using chip controls single stage type pfc circuit, cancel the use of the big electrolytic capacitor of input terminal.To the power supply circuit of chip
It optimizes, reduces the loss on chip power supply circuit, and complete the design of Master control chip peripheral circuit.Calculate output end
The parameter of voltage and current feedback loop, designs power protecting circuit, and rectifier diode to output end and filter capacitor into
Row selection, it is ensured that provide reliable power supply for LED load.
Under alternating current 220V input condition, the efficiency of power supply is 87.04%, power factor 0.968.
Specific embodiment
The preferred embodiments of the present invention will be described in detail, so that advantages and features of the invention can be easier to by ability
Field technique personnel understanding, so as to make a clearer definition of the protection scope of the present invention.
The present invention makes it work as far as possible using two switching tubes in isolating transformer scheme driving double-transistor flyback converter
In synchronous regime, energy loss is reduced.To filter out power input electromagnetic interference, input terminal electromagnetic interface filter.By analyzing flyback
The working condition of formula transformer devises the transformer parameter of power supply actual use in conjunction with actual demand.Since leakage inductance is to two-tube
Inverse excitation type converter when illustrating coiling transformer, reduces the Part Methods of transformer leakage inductance there are larger harm.
Using chip controls single stage type pfc circuit, cancel the use of the big electrolytic capacitor of input terminal.To the power supply circuit of chip
It optimizes, reduces the loss on chip power supply circuit, and complete the design of Master control chip peripheral circuit.Calculate output end
The parameter of voltage and current feedback loop, designs power protecting circuit, and rectifier diode to output end and filter capacitor into
Row selection, it is ensured that provide reliable power supply for LED load.
Under alternating current 220V input condition, the efficiency of power supply is 87.04%, power factor 0.968.For this field
For technical staff, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part
Technical characteristic is equivalently replaced, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement
Deng should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of double-transistor flyback formula LED drive power, the present invention is using in isolating transformer scheme driving double-transistor flyback converter
Two switching tubes, so that it is worked as far as possible in synchronous regime, reduce energy loss, it is defeated to filter out power input electromagnetic interference
Enter to hold electromagnetic interface filter, by analyzing the working condition of flyback transformer, in conjunction with actual demand, devises power supply actual use
Transformer parameter, due to leakage inductance to double-transistor flyback formula converter there are larger harm, when illustrating coiling transformer, reduce transformation
The Part Methods of device leakage inductance.
2. according to claim 1 use chip controls single stage type pfc circuit, cancel making for the big electrolytic capacitor of input terminal
With being optimized to the power supply circuit of chip, reduce loss on chip power supply circuit, and complete Master control chip periphery electricity
The design on road calculates the parameter of output end voltage and current feedback loop, designs power protecting circuit, and the rectification to output end
Diode is selected with filter capacitor, it is ensured that provides reliable power supply for LED load.
3. according to claim 1 under alternating current 220V input condition, the efficiency of power supply is 87.04%, and power factor is
0.968。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711238104.6A CN109862648A (en) | 2017-11-30 | 2017-11-30 | A kind of double-transistor flyback formula LED drive power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711238104.6A CN109862648A (en) | 2017-11-30 | 2017-11-30 | A kind of double-transistor flyback formula LED drive power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109862648A true CN109862648A (en) | 2019-06-07 |
Family
ID=66888230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711238104.6A Pending CN109862648A (en) | 2017-11-30 | 2017-11-30 | A kind of double-transistor flyback formula LED drive power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109862648A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426058A (en) * | 2019-07-25 | 2019-11-08 | 西安德讯威光电测控技术有限公司 | A kind of lasergyro constant multiplier test macro and test method |
-
2017
- 2017-11-30 CN CN201711238104.6A patent/CN109862648A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426058A (en) * | 2019-07-25 | 2019-11-08 | 西安德讯威光电测控技术有限公司 | A kind of lasergyro constant multiplier test macro and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190607 |