CN207266341U - Without stroboscopic touch control drive circuit - Google Patents
Without stroboscopic touch control drive circuit Download PDFInfo
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- CN207266341U CN207266341U CN201721103612.9U CN201721103612U CN207266341U CN 207266341 U CN207266341 U CN 207266341U CN 201721103612 U CN201721103612 U CN 201721103612U CN 207266341 U CN207266341 U CN 207266341U
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Abstract
The utility model provides one kind without stroboscopic touch control drive circuit, including touch control circuit, control chip U1, linear constant current drive circuit；Touch control circuit includes multiple touch units, and touches chip U2；Each touch unit connects each input port for touching chip U2 respectively, and passes through a capacity earth respectively；In touch unit, one of switch as LED lamp, remaining is controlled as the scene change of LED lamp；The output mode selection end for touching chip U2 is grounded by resistance R11；The battery saving mode selection end for touching chip U2 is grounded by resistance R12；Each output terminal for touching chip U2 connects each input port of control chip U1 by a resistance respectively；Two pwm signal output terminals of control chip U1 connect two linear constant current drive circuits respectively, and the output terminal of two linear constant current drive circuits connects two different LED light of colour temperature respectively.The utility model is easy to control, and output current ripple is extremely low, to have the function that LED light without stroboscopic.
Description
Technical field
The utility model is related to a kind of control circuit, especially a kind of desk lamp without stroboscopic touch control drive circuit.
Background technology
Be not in the phenomenon of stroboscopic in order to meet the requirement of no stroboscopic, and during driving LED, existing desk lamp drives electric
Road needs scientific design, effectively to protect the eyesight of eye user；And common circuit is can not to meet requirements above at the same time.LED
The stroboscopic of power supply is primarily due to the ripple larger generally larger than 20% of output current, and ripple makes LED luminosity compared with conference
It is non-constant, substantially reduce the service life of LED, while higher stroboscopic the eyes of lamps and lanterns user can be also more prone to it is tired
The sensation of labor.
The content of the invention
For the deficiencies in the prior art, the utility model provides one kind without stroboscopic touch control drive circuit, interior
Containing touch control circuit and linear constant current drive circuit so that the ripple of output current far smaller than fluctuates the requirement of depth limit value,
At the same time can be with touch control, to reach the effect of conversion scene setting.The technical solution adopted in the utility model is：
It is a kind of electric without stroboscopic touch control drive circuit, including the driving of touch control circuit, control chip U1, linear constant current
Road；
Touch control circuit includes multiple touch units, and touches chip U2；Each touch unit connects touch core respectively
Each input port of piece U2, and pass through a capacity earth respectively；In touch unit, one of switch as LED lamp,
Remaining is controlled as the scene change of LED lamp；The output mode selection end for touching chip U2 is grounded by resistance R11；Touch
The battery saving mode selection end of chip U2 is grounded by resistance R12；Each output terminal for touching chip U2 is connected by a resistance respectively
Connect each input port of control chip U1；The feeder ear of control chip U1 and touch chip U2 are all connected with voltage VCC1；
Two pwm signal output terminals of control chip U1 connect two linear constant current drive circuits respectively, and two linear permanent
The output terminal of stream drive circuit connects two different LED light of colour temperature respectively.
Further, two linear constant current driving circuit structures are identical, and one of linear constant current drive circuit includes：Electricity
Hold C7, resistance R13, sampling resistor R17, constant-current driven chip U3；The PWM light modulation feet of constant-current driven chip U3 meet control chip U1
A pwm signal output terminal, the external resistance terminal of constant-current driven chip U3 is grounded by sampling resistor R17；Constant current drives core
The feeder ear of piece U3 meets voltage VCC2 by resistance R13, and is grounded by capacitance C7, the ground connection termination of constant-current driven chip U3
Ground；An output terminal of constant-current driven chip U3 or multiple output terminal parallel connections are followed by LED light.
Further, constant-current driven chip U3 uses SM15103.
Further, touch chip U2 and use BS816A.
The utility model has the advantage of：
1) it is easy to control, using touch control, light scene can be converted.
2) output current ripple is extremely low, to have the function that LED light without stroboscopic.
Brief description of the drawings
Fig. 1 is the touch control circuit and control chip schematic diagram of the utility model.
Fig. 2 is the linear constant current driver circuit schematic diagram of the utility model.
Embodiment
With reference to specific drawings and examples, the utility model is described in further detail.
No stroboscopic touch control drive circuit provided by the utility model, as depicted in figs. 1 and 2, including touch control electricity
Road, control chip U1, linear constant current drive circuit；
Touch control circuit includes multiple touch unit J1, J2, J3, J4, J5, and touches chip U2；Wherein touch core
Piece U2 uses BS816A；Each touch unit connects each input port for touching chip U2 respectively, and is connect respectively by a capacitance
Ground, the capacitance that touch unit is grounded in Fig. 1 is C2, C3, C4, C5, C6 respectively；In touch unit J1, J2, J3, J4, J5, wherein
One switch as LED lamp, remaining is controlled as the scene change of LED lamp；Touch the output mode selection of chip U2
End (the 7th foot) is grounded by resistance R11；Battery saving mode selection end (the 8th foot) for touching chip U2 is grounded by resistance R12；Touch
Each output terminal for touching chip U2 connects each defeated of control chip U1 by a resistance (R1, R2, R3, R4, R9 in Fig. 1) respectively
Inbound port；It is+5v that the feeder ear of control chip U1 and touch chip U2, which are all connected with voltage VCC1, VCC1,；
Two pwm signal output terminals of control chip U1 connect two linear constant current drive circuits respectively, and two linear permanent
The output terminal of stream drive circuit connects two different LED light of colour temperature respectively, such as warm light LED etc., another cold light LED
Lamp；Control chip U1 uses STC15W402S；
Linear constant current drive circuit is as shown in Fig. 2, Fig. 2 includes two linear constant current drive circuits, for connecting two
The different LED light of colour temperature, to achieve the purpose that light scene can be converted；The structure of the two linear constant current drive circuits is one
Sample, by taking first linear constant current drive circuit as an example, it includes：
Capacitance C7, resistance R13, sampling resistor R17, constant-current driven chip U3；The PWM light modulation feet of constant-current driven chip U3 connect
A pwm signal output terminal of control chip U1, the external resistance terminal of constant-current driven chip U3 are grounded by sampling resistor R17；
The feeder ear of constant-current driven chip U3 meets voltage VCC2 by resistance R13, and is grounded by capacitance C7, constant-current driven chip U3's
Ground terminal is grounded；An output terminal of constant-current driven chip U3 or multiple output terminal parallel connections are followed by LED light；Constant-current driven chip U3
Using SM15103；VCC2 is+24v；
Brief introduction of work principle：
It is assumed that switches of the touch unit J1 as LED light, then touch J1, the corresponding output terminals of chip U2 are touched
KOUT1 exports high level, and the LED light of control chip U1 control acquiescences is opened, for example warm light and cold light LED lamp are opened at the same time, LED
Lamp lighting light is neutral colour temperature；
And touch J2, J3, J4, J5 respectively, then touch chip U2 corresponding output terminal KOUT2, KOUT3, KOUT4, KOUT5
High level is exported respectively；It is predefined in control chip U1, increase brightness, reduce brightness, Dan Kainuan can be controlled respectively
Light LED, singly opens the scenes such as cold light LED；
The utility model is as a result of linear constant current drive circuit, and the fluctuation of output current is much smaller than specified in table one
Limit value；It is ideal state, such as battery powered in input source, current ripples 0%, fluctuation depth is 0.001%.
Table one.
Claims (4)
1. one kind is without stroboscopic touch control drive circuit, it is characterised in that including touch control circuit, control chip U1, linear
Constant-current drive circuit；
Touch control circuit includes multiple touch units, and touches chip U2；Each touch unit connects respectively touches chip U2
Each input port, and pass through a capacity earth respectively；In touch unit, one of switch as LED lamp, remaining
Scene change as LED lamp controls；The output mode selection end for touching chip U2 is grounded by resistance R11；Touch chip
The battery saving mode selection end of U2 is grounded by resistance R12；Each output terminal of chip U2 is touched respectively by a resistance connection control
Each input port of coremaking piece U1；The feeder ear of control chip U1 and touch chip U2 are all connected with voltage VCC1；
Two pwm signal output terminals of control chip U1 connect two linear constant current drive circuits respectively, and two linear constant currents drive
The output terminal of dynamic circuit connects two different LED light of colour temperature respectively.
2. as claimed in claim 1 without stroboscopic touch control drive circuit, it is characterised in that
Two linear constant current driving circuit structures are identical, and one of linear constant current drive circuit includes：Capacitance C7, resistance R13,
Sampling resistor R17, constant-current driven chip U3；The PWM light modulation feet of constant-current driven chip U3 connect a pwm signal of control chip U1
Output terminal, the external resistance terminal of constant-current driven chip U3 are grounded by sampling resistor R17；The feeder ear of constant-current driven chip U3 leads to
Cross resistance R13 and meet voltage VCC2, and be grounded by capacitance C7, the ground terminal ground connection of constant-current driven chip U3；Constant-current driven chip
An output terminal of U3 or multiple output terminal parallel connections are followed by LED light.
3. as claimed in claim 2 without stroboscopic touch control drive circuit, it is characterised in that
Constant-current driven chip U3 uses SM15103.
4. as claimed in claim 1 without stroboscopic touch control drive circuit, it is characterised in that
Touch chip U2 and use BS816A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721103612.9U CN207266341U (en) | 2017-08-31 | 2017-08-31 | Without stroboscopic touch control drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721103612.9U CN207266341U (en) | 2017-08-31 | 2017-08-31 | Without stroboscopic touch control drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207266341U true CN207266341U (en) | 2018-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721103612.9U Active CN207266341U (en) | 2017-08-31 | 2017-08-31 | Without stroboscopic touch control drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207266341U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343343A (en) * | 2017-08-31 | 2017-11-10 | 江苏新广联光电股份有限公司 | Without stroboscopic touch control drive circuit |
-
2017
- 2017-08-31 CN CN201721103612.9U patent/CN207266341U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343343A (en) * | 2017-08-31 | 2017-11-10 | 江苏新广联光电股份有限公司 | Without stroboscopic touch control drive circuit |
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