TPS92691EVM-752: For TPS92691EVM-752 reduce a Mosfet to cost down

Henry Li78

Prodigy 205 points

Part Number: TPS92691EVM-752

Hi TI Team:

The schematic of TPS92691EVM-752 is suitable for my project ,but does it possible to reduce a mosfet to cost down?

over 6 years ago

0 Clinton Jensen over 6 years ago

TI__Mastermind 25500 points

Hello Henry,

Yes, you can use a different FET if you would like. If your application isn't automotive you do not need to use a Q grade device. Either way you can select a different FET. Just be careful of thermals if you use a higher Rds(on) and make sure the gate charge is low enough for the switching frequency you use (Ivcc=Qg*Fsw) so that you do not current limit VCC.

Regards,

Clint

0 Henry Li78 over 6 years ago in reply to Clinton Jensen

Prodigy 205 points

Hello Clint:
I mean ,can I delete one of these mosfet ,not replace with another mosfet.

Henry

0 Clinton Jensen over 6 years ago in reply to Henry Li78

TI__Mastermind 25500 points

Hello Henry,

If you do not need fast PWM dimming (>250Hz or so) you can get rid of Q1, Q2, R2, R5, and D2. You can still PWM dim without them but the edges will be much slower so you need to use a lower PWM frequency if you want a large linear range.

Regards,

Clint

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TPS92691EVM-752: For TPS92691EVM-752 reduce a Mosfet to cost down