TNY277PN IC - Power Integrations Off Line Switcher IC

The TNY277PN 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 TNY277PN 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:- Symbol Parameter Min Type Max Units VBP BYPASS Pin Voltage 5.6 5.85 6.15 V VBPH BYPASS Pin Voltage Hysteresis 0.80 0.95 1.2 V VSHUNT BP/M Pin Shunt Voltage 6 6.4 6.7 V ICH1 BP/M Pin Charge Current -8.3 -5.4 -2.5 m A Related Document:- TNY277PN IC Data Sheet