CN203504816U - LED driver - Google Patents
LED driver Download PDFInfo
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- CN203504816U CN203504816U CN201320559416.8U CN201320559416U CN203504816U CN 203504816 U CN203504816 U CN 203504816U CN 201320559416 U CN201320559416 U CN 201320559416U CN 203504816 U CN203504816 U CN 203504816U
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Abstract
The utility model discloses an LED driver, and is used for driving an LED lamp. The LED driver comprises an EMI circuit, an AC/DC circuit, a DC/DC circuit, and a constant current control circuit connected between the DC/DC circuit and the LED lamp, the circuits are connected in sequence, the driver also comprises a current detection unit arranged between the constant current control circuit and the LED lamp, and a controlled connecting the current detection unit and the constant current control circuit, and the controller drives in real time the constant current control circuit to adjust the magnitude of output current thereof according to a current value detected by the current detection unit. The LED driver enables circuit current to be in a constant current state by setting the current detection unit and the controller, thereby preventing external power interference, and a current instability phenomenon brought by interference of the LED lamp itself.
Description
Technical field
The utility model relates to LED technical field, in particular, and particularly a kind of LED driver.
Background technology
Current LED illumination is little because of having power consumption, long service life, thermal radiation low with the advantage such as stable luminescence, be gradually substituted the dominant position of former incandescent lamp.
The output and the drive current that due to the electrical characteristics of LED, are them are directly proportional, so be higher to the requirement of drive circuit, if LED works under non-constant electric current, can cause luminous unstable, illuminating effect is not good, easily damage and reduce its useful life, therefore, reliable and stable drive circuit is one of core in LED lighting apparatus.
Consult shown in Fig. 1, current LED drive circuit generally comprises EMI circuit, AC/DC circuit and DC/DC circuit, in this circuit, owing to there is no permanent flow control function, it is in general burning voltage situation, LED lamp can be stable work, if but produce continuitys fluctuation, the useful life that will damage and reduce LED lamp at some occasion external voltages.Be directed to this, also someone has designed between DC/DC circuit and LED lamp increases constant-current control circuit, and as shown in Figure 2, but in this scheme, the current fluctuation according to producing due to LED lamp that constant-current control circuit can not be real-time regulates electric current.Therefore, be necessary to design a kind of novel LED driver.
Utility model content
The purpose of this utility model is, for the technical problem that has lack perseverance flow control function in prior art, to provide a kind of LED driver.
In order to solve problem set forth above, the technical solution adopted in the utility model is: a kind of LED driver, for driving LED lamp, it comprises the EMI circuit connecting successively, AC/DC circuit, DC/DC circuit, and be connected in the constant-current control circuit between DC/DC circuit and LED lamp, this driver also comprises the current detecting unit of being located between constant-current control circuit and LED lamp, and the controller that connects this current detecting unit and constant-current control circuit, and described in the current value Real Time Drive that described controller detects according to current detecting unit, constant-current control circuit regulates its output current size.
According to a preferred embodiment of the present utility model: described controller is a MCU chip.
According to a preferred embodiment of the present utility model: described current detecting unit is Hall current sensor.
Compared with prior art, the beneficial effects of the utility model are: the utility model makes circuital current in constant current state by current detecting unit and controller are set, and have avoided extraneous power supply to disturb and LED lamp self disturbs and the electric current wild effect brought.
Accompanying drawing explanation
Fig. 1. be one of structure chart of LED driver of the prior art.
Fig. 2. be two of the structure chart of LED driver of the prior art.
Fig. 3. be the structure chart of LED driver of the present utility model.
Description of reference numerals: 10, EMI circuit, 20, AC/DC circuit, 30, DC/DC circuit, 40, constant-current control circuit, 50, LED lamp, 60, controller, 70, current detecting unit.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Consult shown in Fig. 3, the utility model provides a kind of LED driver, for driving LED lamp 50, it comprises the EMI circuit 10 connecting successively, AC/DC circuit 20, DC/DC circuit 30, and be connected in the constant-current control circuit 40 between DC/DC circuit 30 and LED lamp 50, this driver also comprises the current detecting unit 70 of being located between constant-current control circuit 40 and LED lamp 50, and the controller 60 that connects this current detecting unit 70 and constant-current control circuit 40, and described in the current value Real Time Drive that described controller 60 detects according to current detecting unit 70, constant-current control circuit 40 regulates its output current size.
In the utility model, described controller 60 is a MCU chip; Described current detecting unit 70 is Hall current sensor; Described constant-current control circuit 40 can be the constant-current control circuit consistent with prior art.
Concrete, operation principle of the present utility model is: 220V voltage is exported a direct voltage after EMI circuit 10, AC/DC circuit 20, DC/DC circuit 30, pass through constant-current control circuit 40, output one stabling current, to LED lamp 50, carrys out the work of driving LED lamp 50 again; Now, if the generation current fluctuation due to LED lamp self reason, as: run into loose contact, thunderbolt etc., the unstable constant-current control circuit 40 of controlling of circuital current that controller 60 can detect according to current detecting unit 70 tends towards stability circuital current.
Above-described embodiment is preferably execution mode of the utility model; but execution mode of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection range of the present utility model.
Claims (3)
1. a LED driver, for driving LED lamp (50), it comprises the EMI circuit (10) connecting successively, AC/DC circuit (20), DC/DC circuit (30), and be connected in the constant-current control circuit (40) between DC/DC circuit (30) and LED lamp (50), it is characterized in that: this driver also comprises the current detecting unit (70) of being located between constant-current control circuit (40) and LED lamp (50), and the controller (60) that connects this current detecting unit (70) and constant-current control circuit (40), and described in the current value Real Time Drive that described controller (60) detects according to current detecting unit (70), constant-current control circuit (40) regulates its output current size.
2. LED driver according to claim 1, is characterized in that: described controller (60) is a MCU chip.
3. LED driver according to claim 1, is characterized in that: described current detecting unit (70) is Hall current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320559416.8U CN203504816U (en) | 2013-09-10 | 2013-09-10 | LED driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320559416.8U CN203504816U (en) | 2013-09-10 | 2013-09-10 | LED driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203504816U true CN203504816U (en) | 2014-03-26 |
Family
ID=50335753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320559416.8U Expired - Fee Related CN203504816U (en) | 2013-09-10 | 2013-09-10 | LED driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203504816U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104981078A (en) * | 2015-07-22 | 2015-10-14 | 佛山冠今光电科技有限公司 | LED music lamp based on Bluetooth control |
| CN110989750A (en) * | 2019-11-06 | 2020-04-10 | 深圳市易飞扬通信技术有限公司 | Driver control circuit applied to optical module |
-
2013
- 2013-09-10 CN CN201320559416.8U patent/CN203504816U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104981078A (en) * | 2015-07-22 | 2015-10-14 | 佛山冠今光电科技有限公司 | LED music lamp based on Bluetooth control |
| CN110989750A (en) * | 2019-11-06 | 2020-04-10 | 深圳市易飞扬通信技术有限公司 | Driver control circuit applied to optical module |
| CN110989750B (en) * | 2019-11-06 | 2021-09-14 | 深圳市易飞扬通信技术有限公司 | Driver control circuit applied to optical module |
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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: 20140326 Termination date: 20140910 |
|
| EXPY | Termination of patent right or utility model |