LM51561H: 24V~80V boost solution to 48V~80V output(below 48v to keep 48v, above 48v bypass to output)

Frank Xiao

Genius 12055 points

Part Number: LM51561H
Other Parts Discussed in Thread: LM5022, LM5156,

Hi team,

My customer is looking for 24V~80V boost solution to 48V~80V output(below 48v to keep 48v, above 48v bypass to output). output current< 1A. i found the LM5022 is fine to be used here. Do we have other solutions to suggest here(for example, use LM5156 with a resistor to BIAS pin)? Thanks.

over 3 years ago

0 Yinsong Cai1 over 3 years ago

TI__Expert 7450 points

Hi Frank,

Yes, they can consider LM51561H as the power is not high. They will need to add a simple linear regulator (a transistor and a zener diode should work) for the bias power supply of the IC.

Thanks,

Yinsong

0 Frank Xiao over 3 years ago in reply to Yinsong Cai1

TI__Genius 12055 points

Hi Yinsong,

Do you have a recommended picture for the circuit？Thanks.

0 Yinsong Cai1 over 3 years ago in reply to Frank Xiao

TI__Expert 7450 points

Hi Frank,

Please refer to this one.

Thanks,

Yinsong

Power management

Power management forum

LM51561H: 24V~80V boost solution to 48V~80V output(below 48v to keep 48v, above 48v bypass to output)