New Industry Products

High-Frequency Two-Switch-Forward IC Cuts PSU System Cost and Footprint

February 24, 2014 by Jeff Shepard

HiperTFS™-2 is the newest addition to Power Integrations' Hiper family of ICs, and combines two-switch-forward and flyback power-supply controller ICs with high-voltage MOSFETs into a single highly-integrated package. The high level of integration in HiperTFS-2 ICs saves more than 20 components compared to competing designs, resulting in power supplies with a smaller form factor and higher power density.

A workhorse of the PC main power supply industry, the two-switch-forward topology provides 150 W to 450 W of cost-effective power from a combination of 5 V and 12 V rails. Its advantages – simpler magnetics, lower voltage MOSFETs and higher efficiency – can also be very beneficial to other applications, such as industrial and medical power supplies, telecom rectifiers and higher power battery chargers such as e-bike and pro-sumer power tool chargers.

HiperTFS-2 builds on the success of HiperTFS, and provides: Selectable switching frequency between 66 kHz and 132 kHz, which reduces system cost by enabling the use of small magnetics. 175% peak power - a requirement of next-generation Intel CPUs and Improved surge protection. A new Power Integrations reference design, DER-368, is available now and describes a 12 V, 180 W power supply with 250 W peak output and 10W standby power using a HiperTFS-2 device.