TPS63030: When TPS63030 is add SS circuit, about Vout and FB are oscillating.

Bob Lee62837

Part Number: TPS63030

Dear support member,

My customer used TPS63030.

My customer use TPS63030 add SS circuit from Application report SLVA553.

When a soft start circuit is connected to the outside using TPS63030, Vout and FB are oscillating.
Why does Vout and FB are oscillating?

I attached file about question circuits.
Could you check attached file?

Best regard.
Bob Lee.

TPS63030_Question_180416.pdf

over 7 years ago

0 Sabrina over 7 years ago

TI__Expert 8420 points

Hi Bob,

I would recommend not to use a shotky diode, it has a higher junction capacitance. for example a diode similar to this one : 1N4148 would fit for this application.
The following e2e post explains more in detail the component selection for this soft start circuit, please take a look at it and let me know if you have further questions: e2e.ti.com/.../475122

0 Bob Lee62837 over 7 years ago in reply to Sabrina

Mastermind 7230 points

Dear Sabrina

Thank you very much for reply.
I reply my customer your answer.

I will feedback my customer situation.

Best regard.
Bob Lee.

Power management

Power management forum

TPS63030: When TPS63030 is add SS circuit, about Vout and FB are oscillating.