The LNK363DG is an energy-efficient low power offline Switcher IC incorporates a 700V power MOSFET, oscillator, simple ON/OFF control scheme, a high-voltage switched current source, frequency jittering, cycle-by-cycle current limit and thermal shutdown circuitry onto a monolithic IC. The start-up and operating power are derived directly from the DRAIN pin, eliminating the need for a bias winding and associated circuitry. It combines a high-voltage power MOSFET switch with a power supply controller in one device. Unlike conventional PWM controllers, a simple ON/OFF control regulates the output voltage. The controller consists of an oscillator, feedback circuit, 5.8V regulator, bypass pin undervoltage circuit, over temperature protection, frequency jittering, current limit circuit and leading edge blanking integrated with a 700V power MOSFET. It offers 5W adapter/7.5W open frame at 230VAC±15% and 3.7W adapter/4.7W open frame at 85 to 265VAC output power.
Feature
- Fully integrated auto-restart for short circuit and open loop protection
- Self-biased supply - Saves transformer auxiliary winding and associated bias supply components
- Frequency jittering greatly reduces EMI
- Lowest component count switcher solution
- Universal input range allows worldwide operation
- Simple ON/OFF control, no loop compensation needed
- Eliminates bias winding
- Very low component count - Higher reliability and single side printed circuit board
- Auto-restart reduces delivered power by 95% during short circuit and open loop fault conditions
- High bandwidth provides fast turn-ON with no overshoot and excellent transient load response
- Easily meets all global energy efficiency regulations with no added components
- ON/OFF control provides constant efficiency to light loads - Ideal for mandatory CEC regulations
- 5.8V Regulator and 6.3V shunt voltage clamp
