recommend on MOSFET

golan kormian

Intellectual 880 points

Other Parts Discussed in Thread: TPS22965

hi,

see the attached diagram:

please offer MOSFET for this application.

is it making difference using N or P channel?

over 12 years ago

0 Brett Barr1 over 12 years ago

TI__Mastermind 18200 points

Golan,

Based on your battery, looks like you'll need a 60V FET. At this voltage we only offer N-Channel.

The best recommendation I can make is the CSD18534Q5A.

Thanks,

Brett Barr

0 golan kormian over 12 years ago in reply to Brett Barr1

Intellectual 880 points

Brett,

why do i need a 60V FET?

battery voltage is only 3.5-4.2V....

can u send a reference design i can work with?

0 Brett Barr1 over 12 years ago in reply to golan kormian

TI__Mastermind 18200 points

Sorry,

I thought the battery could go up to 42 V. If it is only 4.2, than any of our FETs should do the job. Don you know if your application will be switching at a very high frequency or will the devices be conducting for extended periods of time. If the latter is the case, than your best bet is selecting FETs with as low as possible Rdsons as your losses will be dominated by on state losses due to Rdson as opposed to switching losses. N-Channel devices typically have lower on resistances.

0 golan kormian over 12 years ago in reply to Brett Barr1

Intellectual 880 points

Hi,

this part of application will work only when there is no power at the mains (no electricity....) and the battery will feed the board.

meanwhile i found the tps22965, MOSFET with control on/off pin - what do u think?

u may reccomend on other MOSFET part.

can u send a reference design for the control circuit at the MOSFET?

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recommend on MOSFET