LM5039: LM5039 soft-start circuit

Kygo Cheng

Part Number: LM5039
Other Parts Discussed in Thread: LM5027, LM5036

Hi Team,

There is a good new that we DIN LM5039

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1075394/lm5039-lm5039-soft-start-circuit/3992696?tisearch=e2e-sitesearch&keymatch=LM5027#3992696

The following question has been asked on e2e before but not answered,

1. In addition to referring to the LM5027 SPEC!! Is there any other information for reference?!
(It is best to use OPA for feedback!! As the red box below) THX

2. If considering the requirement of Vout output high voltage (for example Vout=54VDC)
Can RD add a BJT voltage regulator to point A on the secondary bias side? Will it affect the operation of the soft start circuit if it is lowered to 12V first?! Thank you

over 3 years ago

0 Teng Feng over 3 years ago

TI__Genius 13660 points

Hi Kygo,

LM5027 is EOF, I didn't find the LM5027 SPEC you mentioned.

the provided picture soft-start solution is similar to the solution in LM5036, maybe you can refer the LM5036 if a bias is available in your application

https://www.ti.com/lit/gpn/lm5036

Thanks

Power management

Power management forum

LM5039: LM5039 soft-start circuit