Providing power electronics design engineers with a convenient means of adding boost-type power factor correction to their switching power supplies, TT electronics BI Technologies offers a series of low-profile compact PFC modules that range from 500W to 3000W. In addition, the company has recently developed a ready-to-run evaluation board/design tool capable of testing the modules.
"The Model 7720 Series are the most compact power factor correction modules available, and they contain all power components necessary to implement power factor correction for a switching power supply," said Mike Ochoa-Hougan, hybrid microcircuits product manager for BI Technologies Electronic Components Division. "The single module approach allows design engineers to eliminate many thermal and mechanical mounting issues, as well as the difficulty of selecting the proper FET and diode combinations for an effective, efficient and compact design."
The addition of power factor correction circuitry enables switching power supplies with ratings higher than 75W to make optimum use of the available AC line current while allowing the unit to meet harmonic requirements. It is mandatory in Europe, and is rapidly being accepted in North America.
The 7720 Series module replaces up to ten TO-220 or TO-247 discrete power semiconductors required to achieve power factor correction in a conventional power supply design, Ochoa-Hougan continued.
The power modules are available in three standard configurations:
*Model 7720-1A for power supplies from 1,500W to 3,000W (600V/25A rectifier; 500V/0.1ohm MOSFET);
*Model 7720-2A for power supplies from 1,000W to 2.250W (600V/25A rectifier; 500V/0.3ohm MOSFET);
* Model 7720-3A for power supplies from 500W to 1,500W (600V/18A rectifier; 500V/0.2ohm MOSFET).
Operating temperature range for all the Model 7720 Series is -40°C to +125°C, and the devices have a footprint of 1.380 inches by 2.230 inches, with a board mounted profile of just 0.200 inches.
The PFC evaluation board offered by the company contains all of the necessary control and power circuitry, along with the required inductor assembled onto a compact board. With correction to near unity power factor and better than 95 percent efficiency, the board can easily be used to evaluate a wide variety of applications, including switching power supplies from 500W to 3000W, motor drives, servo amplifiers, solenoid drivers, solid state relays and three-phase rectifier bridges.
The ready-to-run evaluation board accepts 85 to 265 Vrms input voltage at 50-60Hz, and is capable of handling up to 3kW of power with a proper cooled heatsink.
Pricing for the PFC evaluation board is $199, while pricing for the modules begins at under $20 in volume. Lead time is from stock to 12 weeks.
For more information about the Model 7720 Series or the PFC evaluation boards, contact BI Technologies at 714-447-2300, by fax at 714-388-0046; by mail at 4200 Bonita Place, Fullerton, CA 92835; or visit www.bitechnologies.com.