LinkSwitch-XT Series 交流/直流离线转换器:

LinkSwitch-XT incorporates a 700 V 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.

• 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
• Meets HV creepage requirements between DRAIN and all other pins both on the PCB and at the package
• Accurate hysteretic thermal shutdown protection ? automatic recovery improves field reliability
• Universal input range allows worldwide operation
• Simple ON/OFF control, no loop compensation needed
• 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
• Applications: Chargers for cell/cordless phones, digital cameras,appliances, industrial & metering