Pairing the latest sleek, sexy phone with a power adapter that screams “brick” simply doesn’t fly anymore for the consumer, nor does settling for anything but substantially noticeable charging times. But it’s one of the apparent sweet spots for Power Integrations’ latest offline CV/CC flyback switcher ICs in the InnoSwitch line. After all, what manufacturer or consumer doesn’t want to hear “three times the power in the same volume”?
The new InnoSwitch3 devices achieve up to 94% efficiency across line and load conditions, slashing power supply losses by a further 25 percent. Because less waste heat is generated, the designer can get up to 65 W without heatsinks.
The family is optimized into three application-specific series:
CE: Current External. Includes accurate CC/CV CONSTANT VOLTAGE CONSTANT CURRENT regulation with external output current sense for optimum design flexibility. Targets compact single-voltage chargers, adapters, IoT and building automation where low BV and high efficiency are required.
CP: Constant Power. Best for USB Power Delivery (PD), rapid charging and other applications where a dynamic output voltage is required.
EP: Embedded Power. Features the family’s highest-rated MOSFET (725 V) and provides full line and load protection with excellent multi-output cross-regulation for demanding industrial applications and appliances where the higher capital costs of the higher voltage breakdowns mean developers need to invest more in derating.
CCM and Quasi-resonant switching are the keys to the capabilities of these devices and made possible with the company’s 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. 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,
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 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 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-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. An online selection tool, Build Your Own InnoSwitch, is available to help designers customize device features for their particular design specifications. Technical support for InnoSwitch3 ICs, including the PI ExpertTM Online design tool, is available from the Power Integrations website at www.power.com/products/innoswitch/.