LinkSwitch™-CV dramatically simplifies low power, constant voltage (CV) 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 LNK623/4. LinkSwitch-CV provides excellent cross-regulation for multiple-output flyback applications such as DVDs and STBs. A 725V 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. Meets HV creepage requirements between Drain and all other pins, both on the PCB and at the package. Applications includes DVD/STB, adapters, standby and auxiliary supplies, home appliances, white goods, consumer electronics and industrial controls.