I just recently built a amplifier circuit using the TDA7391 audio chip by ST MICROELECTRONICS. I assembled the circuit according to the data sheet and no matter what I have tried it continues to get extremely hot on the case. I have made several attempts to contact the manufacturer about it but have not had much luck. I have build copies of the circuit with the same outcome. I am driving it into a 4 ohm load. The power supply does not show any sign of high current consumption at 12vdc input (0.4A) with the chip disabled. When disabled the chip does not overheat. The PWB has been designed with heavy
heatsink copper pours, but I feel that the temperture is still rather exstream. I know there has been some talk about counterfeit parts, however I did purchase all of my components from Digikey. Has anyone else had any experience with using this class AB bridge audio power amplifier?
heatsink copper pours, but I feel that the temperture is still rather exstream. I know there has been some talk about counterfeit parts, however I did purchase all of my components from Digikey. Has anyone else had any experience with using this class AB bridge audio power amplifier?
