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Class D Audio Amplifier IC Forum Discussions

ghostwolf
Level 1
5 sign-ins First question asked Welcome!
Level 1
Thank you very much for answering my question!
 
According to the official PDF, two kinds of circuit boards are produced
 
One is differential input mode. In this mode, everything works normally. The schematic diagram is as follows:
差分输入.jpg
 
The second input mode is single ended input mode (in fact, it is also a differential signal, in which a group of differential signals are input respectively from the two negative terminals of the amplifier). In this mode, the amplifier is easy to enter the overcurrent protection state, while in the same or higher volume, the two groups of differential input mode will not have overcurrent protection at all. The schematic diagram is as follows
单端输入.jpg

What is wrong with the second input mode? Cause the amplifier to enter the overcurrent protection state frequently

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Nishanth
Moderator
Moderator 25 replies posted 10 solutions authored 50 sign-ins
Moderator

Hi @ghostwolf ,

Thank you for contributing to the Infineon community.

You are experiencing a problem with over-current protection, whether it is in the hardware or in simulation.

Please provide us with CSD pin waveforms for both input mode to understand the issue better.

Regards,

Nishanth 

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