Power Integrations TinySwitch-III AC/DC Off-Line Switcher IC DIP-8

The Power Integrations TinySwitch-III AC/DC Off-Line Switcher IC is an energy-efficient off-line switcher IC in a DIP-8 package, designed to simplify and enhance power supply designs.

Overview

The TinySwitch-III is a highly integrated flyback controller that incorporates a 700V power MOSFET, oscillator, high-voltage switched current source and protection circuitry, including user-selectable current limit and thermal shutdown. Its ON/OFF control scheme is designed to maintain efficiency under very light loads, supporting designs that must meet stringent global energy efficiency regulations, such as the 1W PC standby requirement.

Key Features

• Integrated EcoSmart technology with no-load consumption as low as 50mW when using a bias winding
• Hysteretic thermal shutdown with automatic recovery, removing the need for manual reset
• Improved auto-restart function that limits power to less than 3% of maximum during short-circuit or open-loop conditions
• Output overvoltage shutdown, configurable with an optional Zener diode
• Built-in frequency jittering to reduce electromagnetic interference and lower filter costs
• Electrically quiet SOURCE pins and an optimised pin-out to simplify heat sinking directly to the PCB
• Self-biased IC that requires no external bias winding or components

Design Benefits

The TinySwitch-III supports designs with a very low component count and simple single-sided PCB layouts, which can help reduce bill-of-material costs. Key performance benefits include high bandwidth for fast, overshoot-free start-up and transient load response.

Physical Dimensions

Dimensions (W x D x H): 3 x 2.5 x 4. The product weighs 2.948 gm.