Reference Design Report for a 5 W Charger Using LNK616PG:This engineering report describes a 5 W constant voltage/constant current (CV/CC) universal-input power supply for cell phone or similar charger applications. This reference design is based on the LinkSwitch-II family product LNK616PG.The LNK616PG was developed to cost effectively replace all existing solutions in lowpowercharger and adapter applications. Its core controller is optimized for CV/CCcharging applications with minimal external parts count and very tight control of both theoutput voltage and current, without the use of an optocoupler. The LNK616PG has anintegrated 700 V switching MOSFET and ON/OFF control function which together deliverhigh efficiency under all load conditions and low no-load energy consumption. Both theoperating efficiency and no-load performance exceed all current international energyefficiency standards.
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