CN204598367U - A kind of non-isolation type LED driver - Google Patents
A kind of non-isolation type LED driver Download PDFInfo
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- CN204598367U CN204598367U CN201520145861.9U CN201520145861U CN204598367U CN 204598367 U CN204598367 U CN 204598367U CN 201520145861 U CN201520145861 U CN 201520145861U CN 204598367 U CN204598367 U CN 204598367U
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- isolation type
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- led driver
- type led
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Abstract
The utility model discloses a kind of non-isolation type LED driver, comprise single-phase alternating current, rectification circuit, LED, current-limiting resistance, step-down controller, described single-phase alternating current and rectification circuit, LED, current-limiting resistance are in series; Described step-down controller and LED, current-limiting resistance are in parallel, described step-down controller comprises: N raceway groove isolated gate FET, inductance, electric capacity, diode, be in parallel with diode after described inductance and capacitances in series, then be in series with N raceway groove isolated gate FET.A kind of non-isolation type LED driver that the utility model provides, efficiency is high, and loss is low, and output current ripple is less, and circuit structure is simple, but power output is large.
Description
Technical field
The utility model relates to a kind of non-isolation type LED driver, belongs to LED drive circuit technical field.
Background technology
At present on LED illumination market, with the master of isolated form driving power.Mainly power output is large for it, and fail safe is high, but complex structure, cost compare is large.How by the raising fail safe of simple for structure non-isolated driving power and input power, just become the design problem of the industry.
Utility model content
Object: in order to overcome the deficiencies in the prior art, the utility model provides a kind of non-isolation type LED driver.
Technical scheme: for solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of non-isolation type LED driver, comprise single-phase alternating current, rectification circuit, LED, current-limiting resistance, step-down controller, described single-phase alternating current and rectification circuit, LED, current-limiting resistance are in series; Described step-down controller and LED, current-limiting resistance are in parallel, described step-down controller comprises: N raceway groove isolated gate FET, inductance, electric capacity, diode, be in parallel with diode after described inductance and capacitances in series, then be in series with N raceway groove isolated gate FET.
Also comprise filter capacitor, described filter capacitor and LED, current-limiting resistance are in parallel.
Also comprise fluid stopping diode, described fluid stopping Diode series is after rectification circuit.
Also comprise Inductive ballast, described Inductive ballast and live wire, zero line are in series.
Also comprise protective resistance, described protective resistance and live wire, zero line are in parallel.
Also comprise protection electric capacity, described protection electric capacity and live wire, zero line are in parallel.
Beneficial effect: a kind of non-isolation type LED driver that the utility model provides, efficiency is high, and loss is low, and output current ripple is less, and circuit structure is simple, but power output is large.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, a kind of non-isolation type LED driver, comprises single-phase alternating current, rectification circuit 1, LED 2, current-limiting resistance 3, step-down controller 4, and described single-phase alternating current and rectification circuit 1, LED 2, current-limiting resistance 3 are in series; Described step-down controller 4 is in parallel with LED 2, current-limiting resistance 3, described step-down controller 4 comprises: N raceway groove isolated gate FET 41, inductance 42, electric capacity 43, diode 44, described inductance 42 is in parallel with diode 44 after connecting with electric capacity 43, then is in series with N raceway groove isolated gate FET 41.
Also comprise filter capacitor 5, described filter capacitor 5 is in parallel with LED 2, current-limiting resistance 3.
Also comprise fluid stopping diode 6, after described fluid stopping diode 6 is connected on rectification circuit 1.
Also comprise Inductive ballast 7, described Inductive ballast 7 is in series with live wire, zero line.
Also comprise protective resistance 8, described protective resistance 8 is in parallel with live wire, zero line.
Also comprise protection electric capacity 9, described protection electric capacity and live wire, zero line are in parallel.
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (6)
1. a non-isolation type LED driver, comprises single-phase alternating current, rectification circuit, LED, current-limiting resistance, it is characterized in that: also comprise step-down controller, and described single-phase alternating current and rectification circuit, LED, current-limiting resistance are in series; Described step-down controller and LED, current-limiting resistance are in parallel, described step-down controller comprises: N raceway groove isolated gate FET, inductance, electric capacity, diode, be in parallel with diode after described inductance and capacitances in series, then be in series with N raceway groove isolated gate FET.
2. a kind of non-isolation type LED driver according to claim 1, is characterized in that: also comprise filter capacitor, and described filter capacitor and LED, current-limiting resistance are in parallel.
3. a kind of non-isolation type LED driver according to claim 2, is characterized in that: also comprise fluid stopping diode, and described fluid stopping Diode series is after rectification circuit.
4. a kind of non-isolation type LED driver according to claim 3, is characterized in that: also comprise Inductive ballast, and described Inductive ballast and live wire, zero line are in series.
5. a kind of non-isolation type LED driver according to claim 4, is characterized in that: also comprise protective resistance, and described protective resistance and live wire, zero line are in parallel.
6. a kind of non-isolation type LED driver according to claim 5, is characterized in that: also comprise protection electric capacity, and described protection electric capacity and live wire, zero line are in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520145861.9U CN204598367U (en) | 2015-03-16 | 2015-03-16 | A kind of non-isolation type LED driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520145861.9U CN204598367U (en) | 2015-03-16 | 2015-03-16 | A kind of non-isolation type LED driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204598367U true CN204598367U (en) | 2015-08-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520145861.9U Expired - Fee Related CN204598367U (en) | 2015-03-16 | 2015-03-16 | A kind of non-isolation type LED driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204598367U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104735871A (en) * | 2015-03-16 | 2015-06-24 | 句容市万福达工艺品厂 | Non-isolated type LED driver |
-
2015
- 2015-03-16 CN CN201520145861.9U patent/CN204598367U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104735871A (en) * | 2015-03-16 | 2015-06-24 | 句容市万福达工艺品厂 | Non-isolated type LED driver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20160316 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |