It will be more convenient to use the plug-in of your own PIN power supply factory, but it has three disadvantages: first, the output current is large and the secondary wire diameter is thick. If the wire is wound with its own pin, the pin will be crooked, the solder will be short-circuited, and the solder will be higher than the fulcrum of the skeleton; Second, the difficulty of arranging boards will increase; Thirdly, the creepage distance between the secondary and the magnetic core is not enough, so additional insulation measures need to be added.

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