Revolutionising auxiliary and standby power supplies

27 October 2015

Power Integrations announced the InnoSwitch-EP family of off-line CV/CC flyback switching ICs, providing efficient and reliable power supply circuits. 

The new InnoSwitch-EP ICs employ Power Integrations’ FluxLink technology to produce highly-efficient, accurate and reliable power supply circuits without an optocoupler for auxiliary and standby power. Power Integrations launched its first range of FluxLink switching ICs last year, targeted at cheap consumer applications such as battery chargers. The new range is more robust and intended for use in more expensive applications like white goods, HVAC, consumer electronics, computing, telecom and data communication. 

FluxLink technology enables high-performance secondary-side control to be delivered with the simplicity and low component count usually associated with primary-side regulation. This allows highly-efficient synchronous rectification technology to be employed, resulting in extremely efficient performance across the full load range, including heavy loads. For example, InnoSwitch-EP ICs enable 20W power supplies to achieve approximately 90% efficiency in a multi-output design, while minimising no load consumption to less than 30mW. Line over-voltage regulation is accurate at +/-5 %, while +/-5 % OCP regulation is also achieved.

The switching ICs feature an integrated 725 V MOSFET, synchronous rectification and precise secondary-side feedback sensing control. The new IC family delivers multi-output cross-regulation with full line protection and instantaneous transient response with less than 10mW no load consumption. 

The InnoSwitch-EP ICs enhance power-supply reliability by enabling a low BOM count and the elimination of opto-couplers, which degrade with time. Low voltage-drop across the synchronous rectifier FETs ensures highly accurate cross regulation between output voltage rails, potentially eliminating second stage linear regulators, saving both cost and wasted energy. InnoSwitch-EP ICs also enable designers to meet new ENERGY STAR 7 efficiency standards for monitors.

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