BQ25703A: I use BQ25703A，when chip is working，it is very hot.Please help check my Schematic and layout .

chen chen35

Part Number: BQ25703A

I use BQ25703A in my project ，when the chip is working，it is very hot, about 80 ℃ ，Please help check my Schematic and layout .If it have some mistakes，Please tell me how to correct these mistakes. Thanks a lot！

over 6 years ago

0 Paul Yeh over 6 years ago

TI__Genius 14845 points

Chen,

May I know which component temperature is 80'C?

And could you advise your testing condition? input and output specification?

From your photos, it seems your board is just 2 layer, am I right? I think 2 layer board thermal performance may not be good.

Do you also have efficiency data for your system because we can also quickly judge reason is related to circuit design or PCB board.

BTW, could you send schematic and PCB layout files? Because it is difficult to check from your photos.

Thanks

0 chen chen35 over 6 years ago in reply to Paul Yeh

Intellectual 875 points

Hi Paul
Thank you for you answer，may I have you Email and send the schematic and PCB layout to you ，thanks

0 Paul Yeh over 6 years ago in reply to chen chen35

TI__Genius 14845 points

paulyeh@ti.com

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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BQ25703A: I use BQ25703A，when chip is working，it is very hot.Please help check my Schematic and layout .