TNY278PN IC – Power Integrations Off Line Switcher IC

The TNY278PN incorporates a 700 V power MOSFET, oscillator, high voltage switched current source, current limit (user selectable) and thermal shutdown circuitry. The IC family uses an ON/OFF control scheme and offers a design fl exible solution with a low system cost and extended power capability.

Features:-

•  Simple ON/OFF control, no loop compensation needed
•  Selectable current limit through BP/M capacitor value
•  Higher current limit extends peak power or, in open  frame applications, maximum continuous power Lower current limit improves efficiency in enclosed     adapters/chargers
•  Allows optimum TNY278PN choice by swapping devices with no other circuit redesign Tight I2f parameter tolerance reduces system cost
•  Maximizes MOSFET and magnetic power delivery
•  Minimizes max overload power, reducing cost of transformer, primary clamp & secondary components ON-time extension – extends low line regulation range/hold-up time to reduce input bulk capacitance
•  Self-biased: no bias winding or bias components
•  Frequency jittering reduces EMI filter costs
•  Pin-out simplifies heat sinking to the PCB SOURCE pins are electrically quiet for low EMI

Specification:-