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Modules simplify PFC design

Posted: 22 Nov 2005 ?? ?Print Version ?Bookmark and Share

Keywords:bi technologies? model 7720? power-factor-correction module? pfc module?

PFC modules

BI Technologies' Model 7720 family of power-factor-correction (PFC) modules offers design engineers a convenient way to add boost-type power factor correction to their switching power supplies. The low-profile modules range from 500W to 3kW (heatsink required). A ready-to-run evaluation board/design tool is also available to test the designs.

The 7720 series module is designed to replace up to ten TO-220/TO-247 discrete power semiconductors used for PFC in a conventional power supply design. The modules are available in three standard configurations. The Model 7720-1A is for power supplies from 1.5kW to 3kW (600V, 25A rectifier and 500V, 0.1W MOSFET). The Model 7720-2A is suited to power supplies rated at 1kW to 2.25kW (same rated rectifier and a 500V, 0.3W MOSFET). The Model 7720-3A is for power supplies from 500W to 1.5kW (600V, 18A rectifier and 500V, 0.2W MOSFET).

The PFC evaluation board offered by the company contains all necessary control and power circuitry and an inductor assembled onto a compact board. Providing correction to near unity power-factor and better than 95 percent efficiency, the board can be used to evaluate a wide variety of applications, including switching power supplies, motor drives, servo amplifiers, solenoid drivers, solid state relays and three-phase rectifier bridges.

The modules are rated for operation over -40C to 125C, and are priced starting at under $20 in volume. Lead time is from stock to 12 weeks. The evaluation board is $199.

- Vince Biancomano


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