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TNY179

Power Integrations
Part Number TNY179
Manufacturer Power Integrations
Description Offline Switcher
Published May 30, 2010
Detailed Description TNY174-180 TinySwitch-LT Family Energy Efficient, Offline Switcher with Enhanced Flexibility and Extended Power Range P...
Datasheet PDF File TNY179 PDF File

TNY179
TNY179

Overview
TNY174-180 TinySwitch-LT Family Energy Efficient, Offline Switcher with Enhanced Flexibility and Extended Power Range Product Highlights Lowest System Cost with Enhanced Flexibility • 650 V rating optimized for non-active PFC applications • 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 TinySwitch-LT choice by swapping devices with no other circuit redesign • Tight I2f parameter tolerance reduces system cost • Maximizes MOSFET and magnetics 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 Enhanced Safety and Reliability Features • Accurate hysteretic thermal shutdown protection with automatic recovery eliminates need for manual reset • Auto-restart delivers <3% of maximum power in short-circuit and open loop fault conditions • Output overvoltage shutdown with optional Zener • Very low component count enhances reliability and enables single-sided printed circuit board layout • High bandwidth provides fast turn on with no overshoot and excellent transient load response • Extended creepage between DRAIN and all other pins improves field reliability EcoSmart™– Extremely Energy Efficient • Easily meets all global energy efficiency regulations • No-load <150 mW at 265 VAC without bias winding, <50 mW with bias winding • ON/OFF control provides constant efficiency down to very light loads – ideal for mandatory CEC regulatio...


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