UCC28064: What is maximum number of resistance value of VSENSE of UCC28064?

Bob Lee62837

Mastermind 7230 points

Part Number: UCC28064

Dear support member,

My customer used UCC28064.

I have a question.

What is the maximum number of that can be handled for the resistance value of VSENSE of UCC28064?

It becomes the resistance value of Rc, Rd of Programming Vout of 9.2.2.10 on page 37 of UCC28064 datasheet.

Since I want to reduce the current consumption, what can be increased up to MΩ?

Best regard.
Bob Lee.

over 7 years ago

0 Benjamin Lough over 7 years ago

TI__Mastermind 27095 points

Hi Bob,

Thanks for your interest in UCC28064. I would suggest keeping the output regulation error due to the error amplifier input bias current to less than 1%.

Please keep in mind that increasing the resistance will make the divider more susceptible to noise. For reference, the UCC28064EVM uses ~8.6MΩ in the VSENSE divider:

Best Regards,

Ben Lough

0 Bob Lee62837 over 7 years ago in reply to Benjamin Lough

Mastermind 7230 points

Dear Benjamin Lough,

Thank you very much for reply.

I reply my customer your answer.

Best regard.
Bob Lee.

Power management

Power management forum

UCC28064: What is maximum number of resistance value of VSENSE of UCC28064?