30W micro switch regulated power supply composed of TOP224Y

  
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Here we introduce a kind of 30W micro switch regulated power supply composed of TOP224Y, its circuit is shown in the diagram. Its feature is using TL431 to replace regulation tube VDz2 in the sampling circuit. That is, it can reach the technical target of micro switch power supply by using high stability band gap reference voltage Uref to replace normal zene..
30W micro switch regulated power supply composed of TOP224Y - schematic




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