WEBENCH® Tools/LM3643: LM3643

Alex Mathew1

Part Number: LM3643

Tool/software: WEBENCH® Design Tools

Can i get the documents regarding the input current requirements of LM3643 when the output flash current and flash time varies?

over 4 years ago

0 Charles-Chen over 4 years ago

TI__Genius 11836 points

Hi Alex，

I'm out of office now and will reply to you soon.

0 Charles-Chen over 4 years ago

TI__Genius 11836 points

Hi Alex,

What's your input voltage? We don't have that data since it is related to your input voltage. However, the average input current can be derived from the output flash current. You can calculated the average input current according to you specific input voltage or you can simply do a simulation to get the result.

0 Alex Mathew1 over 4 years ago in reply to Charles-Chen

Prodigy 20 points

Can u send me those equations to derive input current ?

0 Charles-Chen over 4 years ago in reply to Alex Mathew1

TI__Genius 11836 points

Hi Alex,

You can estimated input average current by vo*io/(vin*η).

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WEBENCH® Tools/LM3643: LM3643