TPS54821: Please help confirm whether the schematic design is OK

user5707026

Genius 3145 points

Part Number: TPS54821

Dears

Please help confirm whether the schematic design is OK? Thanks a lot.

TPS54821RHLR

over 6 years ago

0 Neal Zhang over 6 years ago

TI__Expert 4720 points

Hi Elsa,
the EN pin needs to be connected to some voltage source higher than threshold. The PWRGD is a open drain pin, need to connect to some voltage source. I suggest you can follow the Webench design schematic. Please let me know if you have trouble using it.

0 Edwin Zang over 6 years ago

TI__Expert 6425 points

Hi Elsa,

1, It's suggested to add 0.1uF input cap.

2, the rating current of inductor is 5A, right? Loading is 8A, it's suggested to use larger than 10A inductor.

BRs,

Edwin.

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TPS54821: Please help confirm whether the schematic design is OK