BQ24800: BATFET requirement

Fred Cheng

Expert 5290 points

Part Number: BQ24800
Other Parts Discussed in Thread: CSD17308Q3

Hi team,

for 15A charging current, which MOS should I find?

since there's no switching concern, should I choose the one with lowest Rdson ?

over 2 years ago

0 Pengzhao Zhu over 2 years ago

TI__Genius 11385 points

Hi Fred,

We will get back to you soon.

Thanks,

Peng

0 Fred Cheng over 2 years ago in reply to Pengzhao Zhu

TI__Expert 5290 points

follow up on this

+1 Khalid Bairuti over 2 years ago in reply to Fred Cheng

TI__Expert 4780 points

Hi Fred,

Yes, since the BATFET is not switching the main concern is conduction loss, so RDSON is the most important factor. On the EVM we use CSD17308Q3 which is around 10mOhm.

Khalid

0 Fred Cheng over 2 years ago in reply to Khalid Bairuti

TI__Expert 5290 points

Hi Khalid

how about those two "pass through" FET , it's not switching in normal adapter mode,

should I look for lowest Rds_on as well?

0 Tiger Zhou over 2 years ago in reply to Fred Cheng

TI__Mastermind 25405 points

No problem. Treat them as BATFET.

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BQ24800: BATFET requirement