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TPA3255: PBTL Cannot Work

Part Number: TPA3255

Hello E2E Experts,

I use TPA3255's PBTL mode to build a 480w audio amplifer. When power up, no signals input to TPA3255, PVDD = 48V, GVDD=VDD= 12V, DVDD=3.3V, AVDD=7.74V, VBG=1.2V,  the pin CLIP_OTW keeps low, the pin Fault keeps high. When the differential sigal inputs to TPA3255, the CLIP_OTW keeps low , TPA3255 can't work. Please help to check the schematic.

4_PA1.pdf 

Regards,

TICSC