LNK364PN AC-DC Flyback converter offline Switcher IC

Description

Description 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 startup and operating power are derived directly from the DRAIN pin, eliminating the need for a bias winding and associated circuitry. Optimized for Lowest System Cost • Proprietary IC trimming and transformer construction techniques enable Clampless™ designs with LNK362 for lower system cost, component count and higher efficiency • 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 • Lowest component count switcher solution 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