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  [p=30, null, left][color=rgb(34, 34, 34)][font="][size=4][color=#000000]Switching power transformer[/color]Switching power transformer is a power transformer with a switching tube added. In addition t
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  The battery voltage is pulled down, the BAT battery voltage is 4.21V, When MCU_CTL is at a low level (short-connected to GND and then released), Q5 and Q1 are turned off, and the BAT_OUT output is alr
• Is there any abnormal sound from the common mode inductor?
  4V350W dual-tube forward, the customer requires EMI to pass CLASS B with a margin greater than 6dB, two levels of common mode inductors T20_10_10 are added in front, and now both conduction and radiat
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