need help on LM5025A

david williams2

Other Parts Discussed in Thread: LM5025A

is there any one can help us on following

we need to change input voltage on following design from (36 to 75 volt ) to ( 18 to 36 volt ) , please let me know which element must be change in this design

thanks

david

over 11 years ago

0 Kening Gao over 10 years ago

TI__Expert 5900 points

Hi David,

If you change the input voltage, you need modify the the power components such as Primary Mosfet, transformer.

For the control circuit, follow the instructions in LM5025A spec to modify the components.

0 david williams2 over 10 years ago in reply to Kening Gao

Prodigy 20 points

many thanks for your reply , we solved our problem but i have another question

in this circuit +SB is trim pin and J8 is trim up and J6 is trim down or not ?

thanks

david

0 Kening Gao over 10 years ago in reply to david williams2

TI__Expert 5900 points

Hi Williams,

SB is secondary Bias.

J8 and J6 are sense pin which are used to compensate voltage drops on the output by sensing the actual output voltage at the load.

Regards

Power management

Power management forum

need help on LM5025A