TPS92641: SDIM control and Rudim1-3

Devin Karns

Part Number: TPS92641

I have a question regarding designing a circuit for the TPS92641. When setting the device for PWM control using the SDIM pin, are R_udim1-3 and the schottky diode still necessary or can these be eliminated?

Thanks!

over 8 years ago

0 Clinton Jensen over 8 years ago

TI__Mastermind 25500 points

Hello Devin,

If you are not going to use the UDIM pin for dimming you can remove the schottky diode and Rudim3 for sure. You will still need Rudim1 and Rudim2 for under-voltage lockout. If you do not want under-voltage lockout (not necessary but highly recommended to use it) you can get rid of them as well and just tie UDIM to VIN.

Regards,

Clint

0 Clinton Jensen over 8 years ago in reply to Clinton Jensen

TI__Mastermind 25500 points

Correction: Not just remove Rudim3, short it.

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TPS92641: SDIM control and Rudim1-3