Aip9971 Product Precautions
Time:2022-05-15
Views:2126
1. How to reduce pop sound generated by switching SD in class AB mode
Pop sound may appear when switching SD in class AB mode. If the customer wants to switch SD in class AB mode, it is recommended to set mode to high level to make the circuit enter class D mode, switch off the function in class D mode, and finally set mode to low level to make the circuit switch back to class AB mode, which can effectively reduce pop sound.
2. Precautions when using SD port
Because there is no pull-down resistor inside the SD port, the SD port cannot be in the suspended state when in use. If the customer uses the single chip microcomputer to control the SD port, when the single chip microcomputer enters the sleep mode, the SD port may be suspended, so that aip9971 is in the working state, resulting in high overall power consumption of the whole machine. Therefore, it is recommended that customers add a 100k pull-up resistor to the SD port to avoid this problem.
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