TPS564208: Overshoot of inductor current at power-up.

Charlie Xiao

Expert 7765 points

Part Number: TPS564208

Hi Team,

At power-up, why the inductor current will be overshoot? What is the Common reasons? Thanks.

Regards, Charlie

over 3 years ago

+1 Zixu Wang over 3 years ago

TI__Expert 8100 points

Hi Charlie,

Could you please help capture waveforms of Vin, Vout and SW and measure soft start time of this application？

BRs

Zixu

+1 Shuai Fan over 3 years ago

TI__Genius 13451 points

Hi Charlie!

It is possible a common phenomenon. During start up process, ,converter need a current a charge the output cap from zero to target voltage within SS time. The bigger/shorter the output Cap/SS time is, the higher inductor current overshoot.

Shuai

Power management

Power management forum

TPS564208: Overshoot of inductor current at power-up.