TPA3255-Q1：OUT_C & OUT_D

daohai wang

Part Number: TPA3255-Q1

HI ,TI.

TPA3255-q1, 4*SE MODE. The RESET is H . M1 & M2 is H

OUT_A & OUT_B has square wave，but OUT_C & OUT_D none. So, what's the problem ??

OUT_A & OUT_B can play music，OUT_C & OUT_D power on ,than "po",and no music

pls help.

0 Sam(MPAA) Zhang over 3 years ago

Hi,

The schematic looks good. Could you help to measure the voltage on, BST_C/D, INPUT_C/D, and Fault# ? Thanks!

Regards,

Sam

0 daohai wang over 3 years ago in reply to Sam(MPAA) Zhang

HI,I disable A & B & C ,enable OUT_D.

input_D is 6V before 10uF ; 3.6V after 10uF

BST_D is 9.6V

OUT_D is 0.1V.

The IC has damaged？？？

BST_A 20V+ maybe right..

0 daohai wang over 3 years ago in reply to Sam(MPAA) Zhang

#Fault is 0.

0 daohai wang over 3 years ago in reply to Sam(MPAA) Zhang

Se mode and enable out_d.

when I pull down reset , fault is H,pull up reset , fault is L. than speaker no sound ,and bst_d only 9.6v. pls confirm ic damaged.

0 daohai wang over 3 years ago in reply to daohai wang

my fault, solder not good

Audio forum