LMR43620-Q1: I_BIAS value

Yuya Shoji

Expert 5520 points

Part Number: LMR43620-Q1

Tool/software:

Hi team,

I'm BCCing this thread to my customer. Could you provide I_BIAS value? They cannot use below formula.

If they connect EN to VIN, we should append I_LKG-EN terms to the above formula, right?

Out of my curious, can below I_QVIN typ value in FPWM mode?

Best Regards,

Shoji

over 1 year ago

0 Andrew Kutzler over 1 year ago

TI__Mastermind 23815 points

Hi Shoji,

Let me ask the design team.

Thanks,

Andrew

+1 Andrew Kutzler over 1 year ago in reply to Andrew Kutzler

TI__Mastermind 23815 points

Hi Shoji,

This is the answer I got from the design team for I_Bias:

Unfortunately I do not know, but I know it is complicated, and depends on switching frequency and vin (gate charge) which are the dominant component. So it’s unlikely you can find a closed form equation for it in any case.

For the FPWM case it depends on VIN, VOUT, FSW, so that's why no spec is listed in the DS.

Thanks,
Andrew

0 Yuya Shoji over 1 year ago in reply to Andrew Kutzler

TI__Expert 5520 points

Hi Andrew,

The customer understood your answer as well. I'll close this post. Thank you for your cooperation.

Best Regards,

Shoji

Power management

Power management forum

LMR43620-Q1: I_BIAS value