NCP4302 increasing a notebook adaptor's efficiency using synchronous rectification

The NCP4302 is a full featured controller and driver that provide all the control and protection functions necessary for implementing a synchronous rectifier operation in a flyback converter. With the use of the NCP4302, the space conscious flyback applications such as adaptors, chargers, and STBs can achieve significant efficiency improvements at minimal extra cost. In addition to the synchronous rectifier control, the IC incorporates an accurate TL431 type shunt regulator, current monitoring circuit, and optocoupler driver to provide a single IC secondary solution. The NCP4302 works with any type of flyback topology (continuous, Quasi-resonant, or discontinuous mode)—providing a high level of versatility.

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