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.
Features Superior to Linear/RCC
• Accurate hysteretic thermal shutdown protection automatic recovery improves field reliability
• Universal input range allows worldwide operation
• Simple ON/OFF control, no loop compensation needed
• Eliminates bias winding – simpler, lower cost transformer
• 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
