LNK623DG

The LNK623DG is an energy-efficient offline Switcher with accurate primary-side constant-voltage (CV) control. The LinkSwitch-CV dramatically simplifies low power, constant voltage converter design through a revolutionary control technique which eliminates the need for both an optocoupler and secondary CV control circuitry while providing very tight output voltage regulation. The combination of proprietary IC trimming and E-Shield™ transformer construction techniques enables Clampless™ designs with the LinkSwitch-CV LNK623. LinkSwitch-CV provides excellent cross-regulation for multiple-output fly-back applications such as DVDs and STBs. A 700V power MOSFET and ON/OFF control state machine, self-biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry are all incorporated onto one IC.