DescriptionThe LinkSwitch-CV dramatically simplifies low power, constantvoltage (CV) converter design through a revolutionary controltechnique which eliminates the need for both an optocoupler andsecondary CV control circuitry while providing very tight outputvoltage regulation. The combination of proprietary IC trimmingand E-Shield™ transformer construction techniques enablesClampless™ designs with the LinkSwitch-CV LNK623/4.LinkSwitch-CV provides excellent cross-regulation for multipleoutput flyback applications such as DVDs and STBs. A 700 Vpower MOSFET and ON/OFF control state machine, self-biasing,frequency jittering, cycle-by-cycle current limit, and hystereticthermal shutdown circuitry are all incorporated onto one IC.