Tuesday, November 9, 2010

Power Integrations' new HiperTFS incorporates efficient two-switch-forward main and flyback standby power converters into single IC

electronica 2010, MUNICH, GERMANY: Power Integrations, a leader in high-voltage integrated circuits for energy-efficient power conversion, has introduced HiperTFS, a highly integrated power supply IC family for high-power applications.

Uniquely, HiperTFS device family members incorporate both a two-switch-forward converter and a flyback standby power converter into a single, low-profile eSIP power package. As well as the two controllers, HiperTFS devices include high- and low-side drivers and all of the high-voltage power MOSFETs for the main and standby power converters.

Therefore, HiperTFS is an ideal product for consumer, computer, and industrial power supply designs requiring main power from 120 W to 415 W and a standby converter capable of up to 20 W. The new devices particularly target applications requiring high efficiency and compact form factor, such as desktop PCs, TVs, and video game consoles.

Two-switch-forward power converters are often selected for applications demanding cost-effective efficiency, fast transient response, and accurate tolerance to line voltage fluctuation. The two-switch-forward controller incorporated into HiperTFS devices improves on the classic topology by allowing operation considerably above 60 percent duty cycle.

This improvement reduces RMS currents - and therefore conduction losses - and also minimizes the size and cost of the bulk capacitor. The advanced design also includes transformer flux reset control and charge-recovery switching of the high-side MOSFET, which reduces switching losses. This combination of innovations yields an extremely efficient power supply with smaller MOSFETs, fewer passives and discrete components, and a lower-cost transformer.

HiperTFS also includes a 20 W flyback standby controller and MOSFET based on the highly popular TinySwitch technology used in billions of power converter ICs due to its simplicity of operation, light load efficiency, and rugged, reliable, performance.

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