TOP255PN

Product Highlights 

_{Lower System Cost, Higher Design Flexibility}

· Multi-mode operation maximizes eficiency at all loads

· New eSIP-7F and eSIP-7C packages

  . Low thermal impedance junction-to-case(2 ℃ per watt)

  . Low height is ideal for adapters where space is limited

  · Simple mounting using a clip to aid low cost manufacturing

  · Horizontal eSIP-7F package ideal for ultra low height adapter and monitor applications

  · Extended package creepage distance from DRAIN pin to adjacent pin and to heat sink

· No heat sink required up to 35 W using PG and M packages with universal input voltage and up to 48 W at 230 VAC

· Output overvoltage protection (OVP) is user programmable for latching/non-latching shutdown with fast AC reset

  · Alows both primary and secondary sensing

. Line undervoltage(UV) detection prevents turn-off glitches

. Line overvoltage(OV) shutdown extends line surge limit

· Accurate programmable current limit

· Optimized line feed-forward for line ripple rejection

·132kHz frequency (254Y-258Y and all E/Lpackages) reduces transformer and power supply size

  · Half frequency option for video applications

. Frequency jittering reduces EMI filter cost

·Heat sink is connected to SOURCE for low EMI

·Improved auto-restart delilvers <3% of maximum power in

short circuit and open loop fault conditions

·Accurate hysteretic thermal shutdown function automatically

 recovers without requiring a reset

·Fuly integrated soft-start for minimum start-up stress

·Extended creepage between DRAIN and all other pins

 improves field relilability

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