1. DESCRIPTION

The DK1203 is a secondary side flyback type AC-DC Switch Mode Power ControllingIC. Withintegrated 700V high voltage power transistor, patented self-power supply circuit and integratedCMOS circuit design, lots of external components are saved, transformer design is simple, onlytwowindings are needed for the transformer in isolated output

2. APPLICATIONS

·AC/DC power adapters ·DVD/VCD power supply

·Air conditioner power supply ·Electromagnetic oven power supply

·DVB power supply ·LED driver applications

·TV/Monitor power supply

3. MAIN FEATURES

· 85V—264V wide range AC power input · Internal integrated 700V high voltage power transistor

· Internal integrated constant high voltage current driving circuit, no need for additional resistance. · Self-power supply circuit design, no need for additional electricity supply to IC, so that couldreducecomponent and cost · 65KHz PWM switching frequency

· Standby power: <0.3W

· Built in frequency jittering function to reduce standby frequency and output voltage ripple

· Internal Ramp Compensation circuit to keep the stability of the circuit · Internal PMW oscillation circuit with Frequency jittering control to low down EMI filteringcost · Over current, Over temperature, Over voltage, Output short circuit and Secondary sideopencircuitProtection. · 4KV Anti-Static ESD test.