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