LM3410: Flash lamp design based on LM3410

shiyu zhang

Part Number: LM3410

I want to use the LM3410 to design a flash circuit, reference to the relevant circuits drawn PCB circuit board, but my circuit does not seem to work in the most perfect state, the brightness of the lamp does not meet my expectations, I hope that your company to help me modify the circuit, the following is my reference circuit。

Inside this circuit I used three high brightness 3535 LEDs in series, but they are not bright enough, here are the parameters of the 3535 LEDs, and the fact that I want to make sure this circuit is made small enough.

I don't know how to design this circuit to make him work in the perfect state, and to make the small light bright enough, (the small light doesn't need to be on all the time, it will be controlled by the microcontroller to blink a few times quickly at specific moments)

3 个月前

0 Johnsin Tao 3 个月前

TI__Guru**** 308311 points

你的sense电阻是1.91ohm吗？还是多少？

输入电容是多少？最低输入电压是多少？

0 shiyu zhang 3 个月前回复 Johnsin Tao

Prodigy 10 points

No, I just refer to the circuit, my circuit is 3 3535 LED, the current limiting resistor I selected is 1602 package 0.2 ohm resistor, transistor is B3, inductance I use 0420 molded inductance size of 4.7uh, I do not know whether reasonable, capacitance selection, I do not know how much should be selected, I used 10UF, but the brightness of the small lights I used 10UF, but the brightness of the small light is not very high, I do not know what the problem is, and is not connected to the small light, it will directly burn out the chip!Translated with DeepL.com (free version)