Lowest System Cost with Enhanced Flexibility 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 effi ciency in enclosed adapters/chargers Allows optimum TinySwitch-III 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 fi lter costs Pin-out simplifi es heatsinking 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 Improved auto-restart delivers <3% of maximum power in short circuit and open loop fault conditions Output overvoltage shutdown with optional Zener Line undervoltage detect threshold set using a single optional resistor 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 fi eld reliability EcoSmart®– Extremely Energy Effi cient Easily meets all global energy effi ciency regulations No-load <150 mW at 265 VAC without bias winding, <50 mW with bias winding ON/OFF control provides constant effi ciency down to very light loads – ideal for mandatory CEC regulations and 1 W PC standby requirements
