LM5025: LM5025A: start up several times before it becomes stable

Lewis Cheng (TDK)

Prodigy 80 points

Part Number: LM5025

Hi experts,

I have a question about LM5025. Vin slow up waveform.

It's similar to Howard Zou question ( LM5025A: start up several times before it becomes stable )

May i know how to deal with the problem?

I appreciate your great help in advance.

Best regards,

over 6 years ago

0 Lewis Cheng (TDK) over 6 years ago

Prodigy 80 points

Waveform

0 Teng Feng over 6 years ago in reply to Lewis Cheng (TDK)

TI__Genius 13660 points

Hi Lewis,

I think that one of the protection functions must be activated.
Could you firstly catch the ILIM Pin to judge whether OCP is activated (exceeds 0.5 V)? and catch the VDD Pin to judge whether UVLO is activated (below 4.1V)?

Regards,
Teng

0 Teng Feng over 6 years ago in reply to Teng Feng

TI__Genius 13660 points

Hi Lewis,

I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out).

Thanks,
Teng.

0 Lewis Cheng (TDK) over 6 years ago in reply to Teng Feng

Prodigy 80 points

Hi Teng,

The issue has been resolved.
Thanks for your help and following.

Lewis.

Power management

Power management forum

LM5025: LM5025A: start up several times before it becomes stable