CN206977753U - A kind of LDO backlight drive circuits - Google Patents
A kind of LDO backlight drive circuits Download PDFInfo
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- CN206977753U CN206977753U CN201720783672.3U CN201720783672U CN206977753U CN 206977753 U CN206977753 U CN 206977753U CN 201720783672 U CN201720783672 U CN 201720783672U CN 206977753 U CN206977753 U CN 206977753U
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- ldo
- electric capacity
- led load
- drive circuits
- backlight drive
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Abstract
The utility model provides a kind of LDO backlight drive circuits, including direct-current input power supplying, anti-reverse diode, the first electric capacity, the second electric capacity, first resistor, second resistance, the first LED load, the second LED load and LDO chips.The utility model circuit structure is simple, and driving IC oneself power consumptions are relatively low, and usable single lithium battery is operated, and whole piece circuit cost is cheap, is suitably applied small volume and the LED flashlight of confined space.
Description
Technical field：
A kind of electronic circuit is the utility model is related to, more particularly to a kind of LDO backlight drive circuits.
Background technology：
Battery supplies two kinds of topological structures of white LED backlight drive circuit generally use：The charge pump architecture of LED parallel configurations
With the inductance boost type frame structure of LED strip connection configuration.In actual production process, whether circuit structure is simple, driving IC itself work(
Consumption and use cost turn into important indicator, and the compromise factor of both schemes consideration all in need.
Utility model content：
(1) technical problem solved
In order to solve the above problems, the utility model provides a kind of LDO backlight drive circuits, and its circuit structure is simple,
Higher from driving IC conversion efficiencies, cost is cheap.
(2) technical scheme
A kind of LDO backlight drive circuits, including direct-current input power supplying, anti-reverse diode, the first electric capacity, the second electric capacity,
First resistor, second resistance, the first LED load, the second LED load and LDO chips；
The Vin pin of the LDO connect the anti-reverse diode negative terminal and described first electric capacity one end, the LDO respectively
Vout pin connect described second electric capacity one end, described first resistor one end and described second resistance one end respectively, the LDO's
GND pin are grounded；
The direct-current input power supplying anode series connection anti-reverse diode anode, the first resistor other end series connection institute
State the first LED load anode, the second resistance other end series connection the second LED load anode, the direct-current input power supplying
Negative terminal, the first electric capacity other end, the second electric capacity other end, the first LED load negative terminal and the 2nd LED are born
End is loaded with all to be grounded.
Further, the direct-current input power supplying is 2.7~6V.
Further, the anti-reverse diode selects IN4148.
Further, the LDO selects AMC7135.
(3) beneficial effect
The utility model provides a kind of LDO backlight drive circuits, and its circuit structure is simple, driving IC oneself power consumptions compared with
Low, usable single lithium battery is operated, and whole piece circuit cost is cheap, is suitably applied the LED of small volume and confined space
Flashlight.
Brief description of the drawings：
Fig. 1 is a kind of LDO backlight drive circuits schematic diagram involved by the utility model.
Embodiment：
The embodiment involved by the utility model is described in further details below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of LDO backlight drive circuits include direct-current input power supplying E, anti-reverse diode D1, the first electricity
Hold C1, the second electric capacity C2, first resistor R1, second resistance R2, the first LED load D2, the second LED load D3 and LDO chip U.
Direct-current input power supplying is 2.7~6V, and single-unit 1000mAh lithium batteries can be used, and anti-reverse diode D1 selects IN4148.LDO is selected
It is a 350mA ultra low differential pressures flow straightener with AMC7135, its efficiency high is up to 85%.AMC7135 Vin pin are power input
Pin, Vout pin are signal output pin, and GND pin are grounding leg.
AMC7135 Vin pin connect IN4148 negative terminals and electric capacity C1 one end respectively, and Vout pin connect electric capacity C2 mono- respectively
End, resistance R1 one end and resistance R2 one end, GND pin ground connection；Direct-current input power supplying E anodes series connection IN4148 anodes, resistance R1 are another
One end series connection LED load D2 anodes, the resistance R2 other ends series connection LED load D3 anodes, direct-current input power supplying E are born
End, the electric capacity C1 other ends, the electric capacity C2 other ends, LED load D2 negative terminals and LED load D3 negative terminals are all grounded.IN4148 prevents electricity
Pond reversal connection, electric capacity C1 and C2 are bypass filter capacitor, and resistance R1 and R2 are current-limiting resistance.
The utility model provides a kind of LDO backlight drive circuits, and its circuit structure is simple, driving IC oneself power consumptions compared with
Low, usable single lithium battery is operated, and whole piece circuit cost is cheap, is suitably applied the LED of small volume and confined space
Flashlight.
Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality
New spirit and scope are defined.On the premise of the utility model design conception is not departed from, ordinary people in the field couple
The all variations and modifications that the technical solution of the utility model is made, the scope of protection of the utility model, this reality all should be dropped into
With new claimed technology contents, all record in detail in the claims.
Claims (4)
- A kind of 1. LDO backlight drive circuits, it is characterised in that：Including direct-current input power supplying, anti-reverse diode, the first electric capacity, Second electric capacity, first resistor, second resistance, the first LED load, the second LED load and LDO chips；The Vin pin of the LDO connect the anti-reverse diode negative terminal and described first electric capacity one end respectively, the LDO's Vout pin connect described second electric capacity one end, described first resistor one end and described second resistance one end respectively, the LDO's GND pin are grounded；The direct-current input power supplying anode is connected the anti-reverse diode anode, the first resistor other end series connection described the One LED load anode, the second resistance other end series connection the second LED load anode, the direct-current input power supplying negative terminal, The first electric capacity other end, the second electric capacity other end, the first LED load negative terminal and second LED load are born End is all grounded.
- A kind of 2. LDO backlight drive circuits according to claim 1, it is characterised in that：The direct-current input power supplying is 2.7 ~6V.
- A kind of 3. LDO backlight drive circuits according to claim 1, it is characterised in that：The anti-reverse diode is selected IN4148。
- A kind of 4. LDO backlight drive circuits according to claim 1, it is characterised in that：The LDO selects AMC7135.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720783672.3U CN206977753U (en) | 2017-06-30 | 2017-06-30 | A kind of LDO backlight drive circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720783672.3U CN206977753U (en) | 2017-06-30 | 2017-06-30 | A kind of LDO backlight drive circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206977753U true CN206977753U (en) | 2018-02-06 |
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ID=61407213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720783672.3U Active CN206977753U (en) | 2017-06-30 | 2017-06-30 | A kind of LDO backlight drive circuits |
Country Status (1)
| Country | Link |
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| CN (1) | CN206977753U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107087332A (en) * | 2017-06-30 | 2017-08-22 | 湖州升谱电子科技有限公司 | A kind of LDO backlight drive circuits |
-
2017
- 2017-06-30 CN CN201720783672.3U patent/CN206977753U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107087332A (en) * | 2017-06-30 | 2017-08-22 | 湖州升谱电子科技有限公司 | A kind of LDO backlight drive circuits |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180409 Address after: 528437 Guangdong Zhongshan Torch Development Zone, Hao Hao garden 2 phase B building B2 card shop two Patentee after: Toyo industrial lighting (Guangdong) Co., Ltd. Address before: 313000 east side of Shenxin wool textile company north of 318 National Road, Zhili Town, Wuxing District, Huzhou, Zhejiang Patentee before: SINOPOL ELECTRONIC TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 524800 2nd floor, building 2, No.32, Keji West Road, Torch Development Zone, Zhongshan City, Guangdong Province Patentee after: Toyo industry (Guangdong) Co.,Ltd. Address before: 528437 No.2 shop B2, building B, Yuhao Garden Phase 2, Torch Development Zone, Zhongshan City, Guangdong Province Patentee before: TOYO INDUSTRIAL LIGHTING (GUANGDONG) Co.,Ltd. |