Zetex Presents ZXBM2000 Series Motor Controllers

Zetex Semiconductors (UK) announced its new ZXBM2000 Series of fan-motor controllers that integrate rotational speed sensing, locked rotor detection and automatic recovery functions, and which are 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. The 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.