A family of ICs has been developed by Power Integrations, combining two-switch-forward and flyback power-supply controller ICs with integrated high-voltage MOSFETs. This development can potentially save more than 20 components, resulting in a smaller form factor and higher power density. The main converter provides a selectable switching frequency between 66kHz and 132kHz, which reduces system cost by enabling the use of very small magnetics.
The HiperTFS-2 ICs have been shown to achieve efficiencies of more than 90 percent at full load. They can also provide 175 percent peak power, a requirement of next-gen Intel CPUs. The company advises, this single-chip implementation of a two-switch-forward main (66/132kHz) and flyback (132kHz) standby power supply can deliver up to 364W total output power (586W 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.
HiperTFS-2 ICs enable power supply miniaturization 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 magnetic,” said Chris Lee, Product Marketing Manager at Power Integrations.
A new reference design based on theses devices, that describes a 12V, 180W power supply with 250 W peak power load and 10 W standby power is available on the company’s website.
Power Integrations
