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BQ24725A: how to use EMI Switching Frequency Adjust function?

Howard Zou
Genius 12365 points
Part Number: BQ24725A


Hi,

I wonder we should

1. adjust the switching frequency by changing the switching frequency during one charge cycle to help solve EMI issue,

or

2. we should keep the switching frequency constant during one charge cycle, and try 3 kinds of switching frequency to determine which frequency is best at EMI, and then set the best frequency to be used in mass production.