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 efficiency 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 filter costs

? Pin-out simplifies 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

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 regulations and 1 W PC

standby requirements