With line-compensated overload power protection, TinySwitch-4 devices dramatically reduce maximum overload variation over the universal input voltage range. It is particularly helpful in applications such as PC standby and CV adapters to limit maximum O/P power during the overload fault condition. TinySwitch-4 also incorporates 725V MOSFET that easily allows 80% de-rating for high reflected voltage and high bus voltage designs. The BP/M pin permits MOSFET current limit to be adjusted up or down, allowing designers to optimize power delivery and efficiency in a variety of physical implementations. An on-time extension function extends low-line regulation range, enabling hold-up time to be met with lower values of input capacitance. Used in PC standby and other auxiliary supplies, DVD/PVR, other low power set top decoders, supplies for appliances, industrial systems, metering, chargers/adapters for cell/cordless phones, PDAs, digital cameras, MP3/portable audio, shavers, etc.