High-frequency two-switch-forward IC cuts system cost and reduces footprint

Power Integrations has unveiled the HiperTFS-2 family of ICs, that combines two-switch-forward and flyback power-supply controller ICs with integrated high-voltage MOSFETs. This increased level of integration has saved on more than 20 components, resulting in a smaller form factor and higher power density.

The main converter provides a selectable switching frequency between 66 kHz and 132 kHz, which reduces system cost by enabling the use of very small magnetics.

According to PI the HiperTFS-2 ICs enable efficiencies of more than 90% at full load. They also provide 175% peak power, a requirement of next-gen Intel CPUs. This single-chip implementation of a two-switch-forward main (66/132 kHz) and flyback (132 kHz) standby power supply delivers up to 364 W total output power (586 W peak) in a compact, two-row eSIP power package.

Safety features include undervoltage, overvoltage, over-temperature, overcurrent and short-circuit protection. A transformer-reset control function prevents saturation under all conditions.

According to Chris Lee, product marketing manager at Power Integrations, “HiperTFS-2 ICs enable power supply miniaturisation in applications including 80 PLUS Bronze and 80 PLUS Silver PCs, gaming-console adapters and industrial products. The inclusion of the high-side MOSFET driver allows designers to eliminate the pulse transformer and many other supporting components, simplifying design and reducing the size (and cost) of the magnetics.”

A new reference design based on the HiperTFS-2 IC, DER368, describes a 12 V, 180 W power supply with 250 W peak power load and 10 W standby power

www.powerint.com

 

 

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