CN203467040U - Novel LED constant-current driving power supply - Google Patents
Novel LED constant-current driving power supply Download PDFInfo
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- CN203467040U CN203467040U CN201320605044.8U CN201320605044U CN203467040U CN 203467040 U CN203467040 U CN 203467040U CN 201320605044 U CN201320605044 U CN 201320605044U CN 203467040 U CN203467040 U CN 203467040U
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses a novel LED constant-current driving power supply comprising a lightning protection circuit, an EMI unit which is used for removing high-frequency clutters and interference signals, a rectification unit, a voltage conversion unit, a filter unit, an output unit, a sampling unit and a PWM control unit which are electrically connected in sequence, wherein the sampling unit is used for collecting voltage and current signals of the output unit in real time and sends the voltage and current signals to the PWM control unit; and the PWM control unit, based on the voltage and current signals, outputs PWM waves with corresponding duty ratio to the voltage conversion unit so as to adjust a working current of the output unit. The novel LED constant-current driving power supply is simple and reasonable in structure, is capable of improving work efficiency and reducing cost, is high in stability, and is capable of realizing constant current control very well.
Description
Technical field
The utility model relates to a kind of LED driving power, is specifically related to a kind of New LED constant-current driving power supply.
Background technology
The advantages such as LED has efficiently, long-life, low-power consumption, safety, have been widely used in public's facilities such as urban look decoration, traffic station and commercial advertisement.In recent years, along with the development of power output, luminous efficiency and the high power package technology of monocrystalline single tube LED, LED has application prospect widely as general lighting.Led constant-current driving power supply is that power supply supply is converted to specific electric current and voltage with the luminous electric pressure converter of driving LED, there is the shortcomings such as constant current weak effect, stability be bad in conventional driving power, by causing the premature aging of LED, can not reach the long-life feature of LED etc.
Utility model content
For the deficiencies in the prior art, the utility model proposes a kind of high stability, LED constant-current drive circuit cheaply, can realize well constant current and control.
In order to achieve the above object, the technical scheme that the utility model adopts is as follows:
New LED constant-current driving power supply, comprise that the lightning protection circuit, being electrically connected is successively for removing EMI unit, a rectification unit, a voltage conversion unit, a filter unit, an output unit, a sampling unit and a PWM control unit of high frequency clutter and interference signal, described sampling unit is used for voltage, the current signal of Real-time Collection output unit and is sent to PWM control unit, the PWM ripple that this PWM control unit is exported corresponding duty ratio according to this voltage, current signal is to voltage conversion unit, with the operating current of regulation output unit.
Preferably, between described output unit and PWM control unit, be provided with a short-circuit protection unit.
Preferably, between described output unit and PWM control unit, be provided with a current-limiting protection unit.
Preferably, between described output unit and PWM control unit, be provided with an output over-voltage protection unit.
Compared with prior art, the utility model is simple and reasonable, can effectively increase work efficiency, and reduces costs, and has high stability, can realize well constant current and control.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the preferred embodiment of the utility model LED constant-current driving power supply.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further, so that clearer, understand the utility model technological thought required for protection.
Refer to Fig. 1; the utility model relates to a kind of New LED constant-current driving power supply, and its preferred embodiments comprises lightning protection unit 1, EMI unit 2, rectification unit 3, voltage conversion unit 4, filter unit 5, output unit 6, sampling unit 7, PWM control unit 8, short-circuit protection unit 9, current-limiting protection unit 10 and output over-voltage protection unit 11.
Lightning protection unit 1, EMI unit 2, rectification unit 3, voltage conversion unit 4, filter unit 5 and output unit 6 are electrically connected successively.When civil power accesses after LED constant-current driving power supply of the present utility model, high frequency clutter and the interference signal after lightning protection unit 1 carries out lightning protection, by EMI unit 2, removed in power supply, then obtain high voltage direct current through rectification unit 3 rectifications.This high voltage direct current after voltage conversion unit 4 carries out step-down processing by filter unit 5 filtering high-frequency ac parts, thereby by the relatively pure low-voltage DC of output unit 6 output.
As the auxiliary protection circuit of LED constant-current driving power supply, short-circuit protection unit 9, current-limiting protection unit 10 and output over-voltage protection unit 11 are all arranged between output unit 6 and PWM control unit 8,
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion all should belong to the protection range of the utility model claim within.
Claims (4)
1. New LED constant-current driving power supply, it is characterized in that: comprise that the lightning protection circuit, being electrically connected is successively for removing EMI unit, a rectification unit, a voltage conversion unit, a filter unit, an output unit, a sampling unit and a PWM control unit of high frequency clutter and interference signal, described sampling unit is used for voltage, the current signal of Real-time Collection output unit and is sent to PWM control unit, the PWM ripple that this PWM control unit is exported corresponding duty ratio according to this voltage, current signal is to voltage conversion unit, with the operating current of regulation output unit.
2. New LED constant-current driving power supply as claimed in claim 1, is characterized in that: between described output unit and PWM control unit, be provided with a short-circuit protection unit.
3. New LED constant-current driving power supply as claimed in claim 1, is characterized in that: between described output unit and PWM control unit, be provided with a current-limiting protection unit.
4. New LED constant-current driving power supply as claimed in claim 1, is characterized in that: between described output unit and PWM control unit, be provided with an output over-voltage protection unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320605044.8U CN203467040U (en) | 2013-09-27 | 2013-09-27 | Novel LED constant-current driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320605044.8U CN203467040U (en) | 2013-09-27 | 2013-09-27 | Novel LED constant-current driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203467040U true CN203467040U (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320605044.8U Expired - Fee Related CN203467040U (en) | 2013-09-27 | 2013-09-27 | Novel LED constant-current driving power supply |
Country Status (1)
| Country | Link |
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| CN (1) | CN203467040U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307307A (en) * | 2015-12-02 | 2016-02-03 | 东莞芯成电子科技有限公司 | LED dimming system |
| CN105792431A (en) * | 2016-04-14 | 2016-07-20 | 成都恒稳光电科技有限公司 | Led lamp energy-saving power supply |
| CN106658869A (en) * | 2017-02-27 | 2017-05-10 | 温朋亮 | LED constant-current drive power source |
| CN112654108A (en) * | 2019-09-26 | 2021-04-13 | 芯好半导体(成都)有限公司 | Dimming control circuit, control chip, power conversion device and dimming method |
-
2013
- 2013-09-27 CN CN201320605044.8U patent/CN203467040U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307307A (en) * | 2015-12-02 | 2016-02-03 | 东莞芯成电子科技有限公司 | LED dimming system |
| CN105307307B (en) * | 2015-12-02 | 2017-04-12 | 东莞芯成电子科技有限公司 | LED dimming system |
| CN105792431A (en) * | 2016-04-14 | 2016-07-20 | 成都恒稳光电科技有限公司 | Led lamp energy-saving power supply |
| CN106658869A (en) * | 2017-02-27 | 2017-05-10 | 温朋亮 | LED constant-current drive power source |
| CN112654108A (en) * | 2019-09-26 | 2021-04-13 | 芯好半导体(成都)有限公司 | Dimming control circuit, control chip, power conversion device and dimming method |
| CN112654108B (en) * | 2019-09-26 | 2023-06-06 | 上海晶丰明源半导体股份有限公司 | Dimming control circuit, control chip, power conversion device and dimming method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20150927 |
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| EXPY | Termination of patent right or utility model |