TOP244YN is a high performance, extended voltage range, off-line PWM-controller manufactured by Power Integrations. It is capable of supplying up to 60 watts of power in an industry standard 5-pin SOIC package. The device features a high-voltage-startup and low-start-current capability, allowing for easy and cost effective ac-dc power supply designs. It has an operating current of 200mA, a minimum voltage of 8V and a maximum voltage of 850V. It has a frequency range of 45kHz-65kHz and can work in both continuous conduction mode and discontinuous conduction mode. Additionally, the unit features over-temperature, short circuit, and over-voltage protection. TOP244YN is an ideal choice for single-ended, flyback converters in various electronic systems.