LinkSwitch™-3 family of ICs dramatically simplifies low power CV/ CC charger designs by eliminating an optocoupler and secondary control circuitry. The device introduces a revolutionary control technique to provide very accurate output voltage and current regulation, compensating for transformer and internal parameter tolerances along with input voltage variations. The device incorporates 725V power MOSFET, novel ON/OFF control state machine, high-voltage switched current source for self-biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry onto monolithic IC. It compensates for transformer inductance tolerances, input line voltage variations, cable voltage drop and external component temperature variations. Auto-restart protection reduces power delivered by <gt/>90% for output short-circuit and control loop faults (open/shorted components). Used in chargers for cell/cordless phones, PDAs, MP3/portable audio devices, adapters, etc.