UCC256402: UCC256402: UCC256402: Soft start issue

Thanks, and let me get back to you soon.

Hello,

Also, can you share the schematic?

Hi AM,

The schematic doesn't show the feedback section. So, could you share the full schematic?

Regards

Manikanta P

Hi,

Schematic of feedback section is pasted below,

R44 is open in the feedback circuit

Rgds

AM

Hi AM,

Could you let me know how different is this controller ADUM3190 from opto coupler? Does this controller controls the voltage at the EAOUT2 pin?

 It is similar to optocoupler. EAOUT2 is open drain output. It sinks current based on output.

Hi A M,

Thanks for your response.

Did you try the feedback side change that was recommended in previous thread:

(+) UCC256402: Soft start issue - Power management forum - Power management - TI E2E support forums

Your schematic doesn't show this update.

Regards

Manikanta P

we have tried but it didn't change.

Could you share the waveforms and the corresponding schematic values?

Regardes

Manikanta P