TPS62821: TPS62821 switching current limit

Sam Shyu36

Part Number: TPS62821

Dear Sir,

Please help to check below waveform about TPS62821 Vout and Iout. Is it normal for the output voltage to rise again after falling? Is this the behavior of the switching current limit?

Best Regards,

Sam

over 3 years ago

0 Alfonso Furio over 3 years ago

TI__Expert 3645 points

hello,
can you send me also the layout?

0 Alfonso Furio over 3 years ago in reply to Alfonso Furio

TI__Expert 3645 points

Hello Sam,
It seems that the device is working correctly and due to load behavior (the current spike) the device went in current limit. For the current limit see the section 8.4.4 of the datasheet (page 9) and the related value Ilim=2.1 A (page 5). In figure 38 and 39 you can see a typical startup with load and without.

0 Sam Shyu36 over 3 years ago in reply to Alfonso Furio

Intellectual 735 points

Dear Alfonso,

Thanks!

Sam Shyu

Power management

Power management forum

TPS62821: TPS62821 switching current limit