New integrated switcher ICs cut losses by 25% and deliver constant efficiency

Power Integrations released its InnoSwitch3 family of offline CV/CC flyback switcher ICs. The new devices 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 65W without heatsinks. InnoSwitch3 devices are ideal for power supplies with challenging energy consumption, footprint or thermal constraints, particularly those targeting mandatory TEC specifications. These newest flyback switcher ICs employ the company’s innovative isolated digital communications technology, FluxLink, plus 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. The 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 11.5mm creepage and clearance between primary and secondary sides for high reliability, surge and ESD robustness. The new devices also incorporate a host of protection features, including lossless line overvoltage and under-voltage, output overvoltage, over-power, over-current and over-temperature 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 these ICs feature on-board high-voltage MOSFETs (rated at 650V for the CP and CE series and 725V for the EP series). Comments Mike Matthews, VP of product development at Power Integrations: “InnoSwitch3 ICs represent a new state of the art in flyback power supply design. These new devices surpass the previously unrivalled efficiency of our InnoSwitch products, reducing losses by a further 25% and delivering the highest available efficiency across all line and load conditions. With unmatched system simplicity and low component count, InnoSwitch3 ICs enable exceptionally compact, reliable power supplies for a vast range of applications.”