TOP254EN

Enhanced EcoSmart, Integrated Off-Line Switcher tv circuit board components

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Lower System Cost, Higher Design Flexibility

 ►Multi-mode operation maximizes effi ciency at all loads

►New eSIP-7F and eSIP-7C packages

► Low thermal impedance junction-to-case

(2 °C 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 heatsink required up to 35 W using P, G 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

►Allows 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

►132 kHz frequency (254Y-258Y and all E/L packages) reduces transformer and power supply size

► Half frequency option for video applications

►Frequency jittering reduces EMI fi lter cost