LM3410 for Vin=3~5.5V to 1LED Vf=3.5~3.8V / 0.5A

Kai Hsiao

Guru 12675 points

Other Parts Discussed in Thread: LM3410

Dear Sir

I refer to LM3410EVM have SEPIC structure application

But if I want to design Vin=3~5.5V to 1LED Vf=3.5~3.8V / 0.5A

Do you have any recommend solution?? Please kindly help to provide the similar reference design

Thanks

over 9 years ago

0 David Zhang over 9 years ago

TI__Expert 3495 points

Kai Hsiao:
I think LM3410 SEPIC works for your application. Why do you want a different solution?
David Zhang

0 Kai Hsiao over 9 years ago in reply to David Zhang

Guru 12675 points

Dear Sir

Our end customer requirement is below

Vin = 3~5V
Support LED x 1 ( Vf = 3.8V)

Timing SPEC total 16mS (60Hz) ,seems like it is a constant power requirement ?
1. 1ms : 500mA
2. 15 ms : off
3. 8 ms : 250mA
4. 8 ms : off
5. 6 ms : 150mA
6. 10ms: off

Can LM3410 SEPIC do that ?

Thanks

0 David Zhang over 9 years ago in reply to Kai Hsiao

TI__Expert 3495 points

Kai Hsiao:
LM3410 SEPIC can do the LED driver part, but it cannot control the on/off time and change the current setting. Is the customer going to a micocontroller to control the current and timming?
David Zhang

Power management

Power management forum

LM3410 for Vin=3~5.5V to 1LED Vf=3.5~3.8V / 0.5A