How to design a pwm LED dimming circuit?

linkin19

How to design a pwm LED dimming circuit? [Copy link]

I want to use a single chip microcomputer to generate a PWM waveform to control the dimming of an LED. How should I design the LED driving circuit? Is there a circuit composed of a better chip? Please give me some advice! ! ! ! ! ! ! ! ! ! !

qwqwqw2088

It is currently common to use a single chip microcomputer to generate a pwm waveform to control the dimming of LEDs. Ask Baidu, there are many examples and methods. It can be easily achieved. There are pwm drive circuit chips for dimming. TI has them. TLC5941 TLC5947, etc. The address of TI in this regard is http://focus.ti.com.cn/cn/paramsearch/docs/parametricsearch.tsp?family=analog&familyId=480&uiTemplateId=NODE_STRY_PGE _T#sel=LP3943;LP3944;TLC5904;TLC5905;TLC59108;TLC59108F;TLC5911;TLC59116;TLC59116F;TLC59208F;TLC5930;TLC5940;TLC5940-EP;TL C59401;TLC5941;TLC5941-Q1;TLC5942;TLC5943;TLC5944;TLC5945;TLC5946;TLC59461;TLC5947;TLC5951;TLC5970;TLC5971&columnOrderStri ng=o1,o4,p25,p1602min,p1602max,p1603max,p33,p36,p1601,p1246typ,p515,p1247typ,a836,a837,a545,a835,a838,a642,p494,p1130 [This post was last edited by qwqwqw2088 on 2012-11-16 08:34]

tiankai001

Baidu is the best choice. Your question is too general. It is best for you to search for a suitable solution on Baidu first, and then follow the solution. If any problems arise during the process, raise them and we can analyze and solve them together.

linkin19

Thank you, your reply is very powerful! ! ! ! ! ! ! ! !

qwqwqw2088

Now many chips have this interface for LED dimming, and dimming can be achieved by providing a PWM.

figo98802

I'm posting this for reference.

qwqwqw2088

What is the 8-pin MCU that controls the PWM signal in the tb99 that the host sent? What are the other two files? Are they empty files?