CN207039960U - A kind of single battery boosting LED drive circuit - Google Patents
A kind of single battery boosting LED drive circuit Download PDFInfo
- Publication number
- CN207039960U CN207039960U CN201720843847.5U CN201720843847U CN207039960U CN 207039960 U CN207039960 U CN 207039960U CN 201720843847 U CN201720843847 U CN 201720843847U CN 207039960 U CN207039960 U CN 207039960U
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- China
- Prior art keywords
- pin
- boosting
- led
- driving chip
- single battery
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Classifications
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Led Devices (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model provides a kind of single battery boosting LED drive circuit, including direct-current input power supplying, power switch, first~3rd resistor, inductance, electric capacity, boosting driving chip and LED load.The utility model only needs single battery to drive LED load normal work, have battery low-electricity quantity monitoring function concurrently simultaneously, greatly improve the operating efficiency and service life of battery, its circuit structure is simple, safety and environmental protection, it can be widely applied to the Portable lighting devices such as LED flashlight, LED mine lamp.
Description
Technical field：
A kind of electronic circuit is the utility model is related to, more particularly to a kind of single battery boosting LED drive circuit.
Background technology：
At present, common portable LED illumination device drives LED usually using two sections even more multiple batteries on the market
Normal work, not only influences the volume and weight of portable LED illumination device, and reduces operating efficiency and the use of battery
In the life-span, cause the unnecessary waste of resource.
Utility model content：
(1) technical problem solved
In order to solve the above problems, the utility model provides a kind of single battery boosting LED drive circuit, only uses single-unit
Battery can drive LED normal works.
(2) technical scheme
A kind of single battery boosts LED drive circuit, including direct-current input power supplying, power switch, first~3rd resistor,
Inductance, electric capacity, boosting driving chip and LED load；
The boosting driving chip VIN pin are connected with the direct-current input power supplying anode, pass through the inductance and the liter
Pressure driving chip SW pin are connected, and the boosting driving chip CTRL/SHDN pin connect described second resistance one end and described respectively
3rd resistor one end, the boosting driving chip LOBAT pin are connected with the 3rd resistor other end, the boosting driving chip
CAP pin are grounded by the capacity earth, the boosting driving chip LED pin by the LED load, the boosting driving core
Piece CELLS pin and GND pin are all grounded；
The direct-current input power supplying anode connects described first resistor one end and described respectively by the power switch
The two resistance other ends, the direct-current input power supplying negative terminal and the first resistor other end are all grounded.
Further, the direct-current input power supplying is 1~3.2V.
Further, the electric capacity is 4.7 μ F.
Further, the boosting driving chip selects LTC3490.
(3) beneficial effect
The utility model provides a kind of single battery boosting LED drive circuit, only needs single battery LED can be driven to bear
Normal work is carried, while has battery low-electricity quantity monitoring function concurrently, greatly improves the operating efficiency and service life of battery, its electricity
Line structure is simple, safety and environmental protection, can be widely applied to the Portable lighting devices such as LED flashlight, LED mine lamp.
Brief description of the drawings：
Fig. 1 is a kind of single battery boosting LED drive circuit 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 single battery boosting LED drive circuit, including direct-current input power supplying E, power switch K, electricity
Hinder R1~R3, inductance L, electric capacity C, boosting driving chip U and LED load D.Direct-current input power supplying E is 1~3.2V, can use single-unit
Battery, electric capacity C are low ESR 4.7 μ F electric capacity.Boosting driving chip U selects LTC3490, is a synchronous boost code converter,
It can normally start under conditions of input voltage as little as 0.9V, export 350mA electric currents and 2.8~4V voltages.Its CELLS pin carries
Level is detected for two battery low-electricity quantities, low level corresponds to single battery and high level corresponds to binodal battery；VIN pin are that power supply is defeated
Enter pin；SW pin are to switch input pin, external inductance；GND pin are grounding leg；LED pin output current drives LED load；CAP pin connect
The low μ F filter capacitors of ESR 4.7；LOBAT pin are that battery low-electricity quantity monitors pin；CTRL/SHDN pin have shut down, brightness adjustment control and
Constant current exports three kinds of functions, and when the pin voltage is less than 0.2VIN pin voltages, chip is in shutdown mode, higher than 0.9VIN
During pin voltage, LED pin output 350mA constant currents, when between 0.2~0.9VIN pin voltages, LED pin output current will be 0
~350mA linear changes.
LTC3490 VIN pin are connected with direct-current input power supplying E anodes, are connected by boost inductance L with SW pin, CTRL/
SHDN pin connect divider resistance R2 one end and divider resistance R3 one end respectively, and LOBAT pin are connected with the divider resistance R3 other ends,
CAP pin are grounded by filter capacitor C, and LED pin are grounded by LED load D, CELLS pin ground connection, low in the case of setting single battery
Power threshold, GND pin ground connection；Direct-current input power supplying E anodes connect resistance R1 one end respectively by power switch K and resistance R2 is another
One end, direct-current input power supplying E negative terminals and the resistance R1 other ends are all grounded.When cell voltage is down to the low battery of CELLS pin setting
When below threshold value, LOBAT pin are pulled to low level, feed back to CTRL/SHDN pin by divider resistance R3, reduce the defeated of LED pin
Go out electric current, so as to extend the working time of battery.
The utility model provides a kind of single battery boosting LED drive circuit, only needs single battery LED can be driven to bear
Normal work is carried, while has battery low-electricity quantity monitoring function concurrently, greatly improves the operating efficiency and service life of battery, its electricity
Line structure is simple, safety and environmental protection, can be widely applied to the Portable lighting devices such as LED flashlight, LED mine lamp.
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)
- The LED drive circuit 1. a kind of single battery boosts, it is characterised in that：Including direct-current input power supplying, power switch, first~ 3rd resistor, inductance, electric capacity, boosting driving chip and LED load；The boosting driving chip VIN pin are connected with the direct-current input power supplying anode, are driven by the inductance and the boosting Dynamic chip SW pin are connected, and the boosting driving chip CTRL/SHDN pin connect described second resistance one end and the described 3rd respectively Resistance one end, the boosting driving chip LOBAT pin are connected with the 3rd resistor other end, the boosting driving chip CAP Pin is grounded by the capacity earth, the boosting driving chip LED pin by the LED load, the boosting driving chip CELLS pin and GND pin are all grounded；The direct-current input power supplying anode connects described first resistor one end and second electricity respectively by the power switch The other end is hindered, the direct-current input power supplying negative terminal and the first resistor other end are all grounded.
- A kind of 2. single battery boosting LED drive circuit according to claim 1, it is characterised in that：The direct current input Power supply is 1~3.2V.
- A kind of 3. single battery boosting LED drive circuit according to claim 1, it is characterised in that：The electric capacity is 4.7 μF。
- A kind of 4. single battery boosting LED drive circuit according to claim 1, it is characterised in that：The boosting driving Chip selects LTC3490.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720843847.5U CN207039960U (en) | 2017-07-12 | 2017-07-12 | A kind of single battery boosting LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720843847.5U CN207039960U (en) | 2017-07-12 | 2017-07-12 | A kind of single battery boosting LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207039960U true CN207039960U (en) | 2018-02-23 |
Family
ID=61463746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720843847.5U Expired - Fee Related CN207039960U (en) | 2017-07-12 | 2017-07-12 | A kind of single battery boosting LED drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207039960U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107249232A (en) * | 2017-07-12 | 2017-10-13 | 湖州升谱电子科技有限公司 | A kind of single battery boosting LED drive circuit |
-
2017
- 2017-07-12 CN CN201720843847.5U patent/CN207039960U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107249232A (en) * | 2017-07-12 | 2017-10-13 | 湖州升谱电子科技有限公司 | A kind of single battery boosting LED drive circuit |
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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: 20180223 Termination date: 20190712 |
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| CF01 | Termination of patent right due to non-payment of annual fee |