Trade Shows

Click here for free admission
26.06. - 28.06.2018, Nuremberg
Hall 5, Booth 5-401




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Germany / General
André Huntrieser
✆: +49 (0) 2129 - 376-202
✉: Send email
Field Applications Engineer
Günter Fuchs
✆: +49 (0) 2129 376-200
✉: Send email
Tech Support
Raphael Balke
✆: +49 (0) 2129 376-200
✉: Send email

Austria / Switzerland
Karl Eder
✆: +43 (0) 7448 - 21643-11
✉: Send email





The US891 is a one-chip solution for driving two-coil brushless DC motors and fans.
Based on the advanced Melexis complementary metal oxide semiconductor (CMOS) process, the integrated circuit (IC) contains a Hall-effect sensor, dynamic offset correction and powerful output drivers with 1.200 mA peak output current capability. Specially designed for driving large fans, the device is optimized for low startup voltage.
The rotation detection (RD) open-drain output makes easier the connectivity with any external interface such as hardware monitoring. These features are combined with the Melexis patented no-VDD design to fit the IC in a small 4-pin through-hole package (TO92).




Features Application examples
  • 2-coil fan driver
  • On-chip solution with Hall-element and output drivers
  • High sensitivity integrated Hall sensor
  • Alarm signal (RD) protected output
  • Locked rotor protection and auto-restart
  • Power-efficient CMOS and power MOSFETs
  • Built-in output protection clamping diode
  • Low startup voltage
  • Temperature range from -40°C to 85°C (Code E)
  • Low supply voltage from 2.6V to 18V
  • Low output resistance
  • Output currents:
    • 1200mA Peak
    • 600mA Continuous
  • TO92-4L package (VK package)
  • 5V / 12V 2-Coil brushless DC motor / fan
  • Automotive applications
  • Industrial and Robotics
  • Home & Office Automation
  • Building& Security Automation
  • Consumer solutions
  • White Goods & Household Appliances