US891 Two-Coil Fan Driver - High Output Current (Alarm output)

The US891 is a one-chip solution for driving two-coil brushless DC motors and fans.

Based on the advanced Melexis CMOS process, the IC contains a Hall-effect sensor, dynamic offset correction and powerful output drivers with 1200mA peak output current capability.

Specially designed for driving large fans, the device is optimized for low start-up voltage.

The Rotation Detection open-drain output makes easier the connectivity with any external interface such as hardware monitoring or Super I/O IC.

These features are combined with the Melexis patented no-VDD design to fit the IC in a small 4-pin VK package.

Features and Benefits

Peak output current up to 1200mA
Low start-up voltage
Low output resistance
High sensitivity integrated Hall Sensor
Power-efficient CMOS and power MOSFETs
Built-in output protection clamping diode
Locked rotor protection and auto-restart
Integrated alarm signal protected output
Low cost
2-coil fan driver with RD output in
RoHS Compliant 4-pin VK package

Contact person:

Frances New

Phone:+86-755-83299282

Fax:+86-755-22645259

Email:sumzi@sumzi.com

MSN:sumzi_frances@msn.com

http://www.sumzi.com