LinkSwitch-II Family Design Guide:LinkSwitch-II is a highly integrated monolithic switching IC family designed for off-line power supplies with outputs up to 6.1 W. Ideally suited for chargers, adapters, auxillary supplies and LED drivers, LinkSwitch-II provides constant voltage and constant current (CV/CC) output regulation without using an optocoupler or secondary feedback circuitry. The integrated output cable voltage drop compensation (LNK61x only), transformer inductance compensation, and external component temperature variation compensation allow high accuracy even at the end of the output cable. ON/OFF control optimizes effi ciency across load and line, enabling designs to easily meet no-load and power supply effi ciency requirements.