Zetex offers motor controllers for 100W fans

The ZXBM2000 series of fan motor controllers from Zetex Semiconductors integrates rotational speed sensing, locked rotor detection, and automatic recovery functions, and is targeted for variable speed control of two-phase, dc brushless fan and blower motors up to 100W.

The controller's two-phase drive outputs deliver up to 80mA to a pair of external MOSFET or bipolar transistors connected to the fan motor windings. Speed control is implemented via the application of a variable external voltage or an NTC thermistor input.

Fan rotor position is detected via a built-in Hall amplifier that enables Hall sensors to be wired to the controller IC directly.

Offered in an MSOP10 package, the controllers operate from a -0.6V to 20V supply and dissipated 500mW. The ZXBM2002 version features a rotor lock output, while the ZXBM2003 has a speed pulse output. The ZXBM2001 version combines both outputs into one package.

Zetex Semiconductors is an exhibitor at this year's International IC ? China Conference and Exhibition (IIC-China), which will be held in Shanghai on April 8 and 9, Beijing on April 11 and 12, and Shenzhen on April 15 and 16. IIC-China is organized by eMedia Asia Ltd, a Global Sources and CMP Media joint venture.