Introduction

The DK1203 is a secondary side flyback type AC-DC Switch Mode Power Controlling IC. With integrated 700V high voltage power transistor,patented self-power supply circuit and integrated MOS circuit design, lots of external components are saved, transformer design is simple, only two windings is needed for the transformer in isolated output circuit.

Description

Input voltage 85V to 265V full voltage range

Built-in 700V power tube

Built-in self-powered circuit (patented), no auxiliary winding power supply

Integrated self-starting circuit

Current mode PWM control

VCC operating voltage range of 4V to 6V

65Khz switching frequency

Auto-enter skip cycle mode at light load

Over-temperature, over-current, over-voltage, overload protection

Standby power consumption is less than 0.3W

Frequency jitter reduces EMI filtering cost