Vibration Motor Driver IC
Melexis announced the MLX90283 is single phase brushless vibration motor driver IC which allows increased battery life and delivers strong and clearly detected vibrations. The device integrates hall-effect sensor, digital and power driver circuitry into a low profile Ultra-thin QFN package and introduces the new proprietary ‘Active Start’ design to improve single phase vibration motor start-up reliability. The 1.8V to 3.6V operating voltage range perfectly suits battery-powered applications. It detects a locked state within 110ms (typical) by sensing the rotor magnetic field. Once this detection period has elapsed, the device enters in ‘Active Start’ and applies a 55Hz frequency (typical) to the motor coil. This electrical oscillation is converted into mechanical shaking, producing swift movement of the rotor in forward and reverse direction. Single-phase vibration motors are generally optimized for one rotational direction. Reverse rotation decreases speed and raise current consumption. The package measures 3 mm2 (1.5 mm x 2 mm) with 0.43 mm maximum thickness. It is priced at $0.325 in 5k quantities.