XZ2803 high performance current mode PWM controller designed for cost-effective design of AC-DC converter in 85V-265V wide voltage range up to 12W of continuous output power, peak output Shi rate can also reach 18W. Optimized high-rational of the circuit design combined with high prices of a bipolar fabrication process, maximize savings on overall product cost of the power supply controller can operate in a typical flyback circuit topology to form compact AC-DC converter . IC internal start-up circuit is designed as a unique current-sinking mode, you can use the power switch itself amplification to complete startup, which significantly reduces the startup resistor, the power consumption; in the output power is small, the IC will automatically reduce the work frequency, in order to achieve a very low standby power consumption in the power MOSFET is off, the internal circuitry of the power control the reverse bias, the direct use of a bipolar transistor high-pressure characteristics of the CB, greatly improve the voltage resistance of the power tube capacity until the 700V high voltage, which guarantees the power control of security, IC house also provides a comprehensive anti-overload anti-saturation function, real-time to prevent overload, transformer saturation, output short circuit or other abnormal conditions, improve power reliability. current limit and clock frequency set by external devices. DIP8 are available to meet the European standard package and a standard lead-free package.