Trade Shows

27.02. - 01.03.2018, Nuremberg
Hall 1, Booth 1-670

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


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 Melexis US168 is a one-chip solution for driving single-coil brushless DC (BLDC) fans and motors.
The IC includes Hall-effect sensor, chopping amplifier for offset cancellation, digital control circuitry and full bridge output driver.
The use of Soft Switching-concept lowers the acoustic and electrical motor noise and provides smoother operation.
The US168 device includes reverse voltage protection, locked rotor protection and thermal protection. Therefore, the IC robustness perfectly suits for consumer and automotive-on-board applications.
The integrated tachometer (FG) output follows the Hall sensor signal which allows determining the rotation speed. Its open-drain output facilitates the connectivity with external interface for hardware monitoring.
The built-in locked rotor protection automatically shuts off the coil current when the rotor is mechanically blocked for more than 0.4 second. The fan tries to restart every 2.8 seconds until the rotor is released. This on/off cycling reduces the average current by factor of 7. It is enough to prevent fans from overheating or damage.


Features Application examples
  • Single coil fan driver
  • On-chip solution with Hall-element and output drivers
  • High sensitivity integrated Hall sensor
  • Tachometer output signal (FG)
  • Soft switching for low noise
  • Locked rotor protection and auto-restart
  • Full bridge driver
  • Temperature range from -40°C to 85°C (Code E)
  • Low supply voltage from 1.8V to 6.5V
  • Output currents:
    • 500mA Peak
    • 300mA Continuous
  • Low power consumption
  • Reverse voltage protection
  • Thermal protection and auto-restart
  • No external components needed
  • Ultra-thin leadless UTQFN-6L package
  • 3V / 5V Single-Coil brushless DC motor / fan
  • Micro-Motors
  • Automotive applications
  • Industrial and Robotics
  • Medical and Health-care,
  • Home & Office Automation
  • Building& Security Automation
  • Consumer solutions
  • Micro-Motors