TPA3255: TPA3255 High output protection

Darren Yang

Expert 2000 points

Part Number: TPA3255

my customer use the TPA3255 solution for BTL Mudule 120W/4Ω load, PVDD+35V,When the output is about 40W (PVDD=13V), it can't go up,pls help give suggsetion ，SCH such as attachmentsSchematics.pdf

over 7 years ago

0 Justin Bohr over 7 years ago

TI__Mastermind 27990 points

Hi Darren,

Are you using the TPA3255EVM for this testing? If so, there is a reset IC that is looking for a 15V rail from a buck in the EVM power tree. If PVDD is 13V then the buck will not be able to produce 15V from PVDD. The TPA3255 itself can operate with a PVDD of 13V.

Justin

0 Darren Yang over 7 years ago in reply to Justin Bohr

Expert 2000 points

Hi Justin，sorry to Description error，output is about 40W the TPA3255 happy shutdown measure the output Vp-p is 13V, tomorrow I will try to measure the status both CLIP_OTW and FAULT , besides, from the SCH, the customer uses Bootstrap capacitor is 0.33uF，I will set it to 1uF and Close to TPA3255 possible from layout，could you help give other suggestions according to SCH，tks！

0 Justin Bohr over 7 years ago in reply to Darren Yang

TI__Mastermind 27990 points

Hi Darren,

As I understand you have solved this issue. The thread is closed.

Justin

0 Darren Yang over 7 years ago in reply to Justin Bohr

Expert 2000 points

yes，many thanks your help！

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TPA3255: TPA3255 High output protection