By Alix Paultre, contributing editor

Power Integrations, a leader in high-voltage integrated circuits for energy-efficient power conversion, released the InnoSwitch3 family of offline CV/CC flyback switcher ICs, which achieve up to 94% efficiency across line and load conditions, slashing power supply losses by a further 25% and enabling the development of compact power supplies up to 65 W without heatsinks. InnoSwitch3 devices are ideal for power supplies with challenging energy consumption, footprint, or thermal constraints, particularly those targeting mandatory Total Energy Consumption specifications.

Roundup_PI-Innoswitch

These newest flyback switcher ICs employ the company’s isolated digital communications technology, FluxLink, as well as synchronous rectification, quasi-resonant switching, and a precise secondary-side feedback sensing and control circuit. This results in highly efficient, accurate, reliable power supply circuits without the need for optocouplers. InnoSwitch3 devices are CCC, UL, and VDE safety-certified to bridge the isolation barrier, and the InSOP-24 package provides a low-profile, thermally efficient solution with extended 11.5-mm creepage and clearance between primary and secondary sides for high reliability, surge, and ESD robustness.

The devices also incorporate a host of protection features, including lossless line overvoltage and undervoltage, output overvoltage, overpower, overcurrent, and overtemperature protection, as well as output rectifier short-circuit protection. Device sub-families are provided with either latching or auto-recovery capability, according to the typical demands of each target application space. All InnoSwitch3 ICs feature on-board high-voltage MOSFETs (rated at 650 V for the CP and CE series and 725 V for the EP series).

InnoSwitch3 ICs target adapters and open-frame power supplies for consumer, computer, communication, and industrial applications. InnoSwitch3-CP and InnoSwitch3-CE IC samples are available now, priced at $1.11 (CE) and $1.15 (CP), in 10,000-piece quantities. InnoSwitch3-EP parts will be available in November 2017 at $1.18 per 10,000 pieces.