LM5051: LM5051 back to back MOSFET structure

Steven He92

Expert 2125 points

Part Number: LM5051
Other Parts Discussed in Thread: TPS23525, TPS23523

Dear Sir,

I saw LM5051 EVM, about MOSFET may I design a back to back MOSFET structure?

Thanks!

Steven

over 6 years ago

0 Karikalan Selvaraj over 6 years ago

TI__Genius 16305 points

Hi Steven, Yes it may be possible to support back to back MOSFET with LM5051, however some care need to be taken due to the linear ORing mechanism. Let me get back tomorrow in more details. Regards, Kari

0 user5182420 over 6 years ago in reply to Karikalan Selvaraj

Prodigy 20 points

Dear Kari,

Thanks for your review.

Wait your advise.

Thanks!

Steven

0 Karikalan Selvaraj over 6 years ago in reply to user5182420

TI__Genius 16305 points

Hello Steven,

With LM5051 linear regulation scheme, it will need more discrete (which we have not tested, no results to share yet) circuitry around LM5051 to control two back to back MOSFETs.

However we suggest TPS23525 or TPS23523 which control ORing and Hotswap back to back FETs for -48v application.

Could you please have a look at this device and let us know if it works for your application as well?

Regards,

Kari.

0 Steven He92 over 6 years ago in reply to Karikalan Selvaraj

Expert 2125 points

Dear Kari,

Thanks for your advise.

Let me with customer discussion then update to you.

Thanks!

Steven

Power management

Power management forum

LM5051: LM5051 back to back MOSFET structure