Customers who wish to provide some help.
	DC power converter whether its input and output electrically isolated, can be divided into non-isolated converter circuit and isolation transformer circuits.
	
	Several switching power supply circuit topology:
	Step-Down (Buck) converter,
	Step-Up (Boost) converter,
	Polarity reversal Buck (Buck-Boost) converter,
	Cuk converter single-ended,
	Flyback converter,
	Push-pull converter
	Half-bridge,
	Full-bridge converter.
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