FD0255b

FEELING TECHNOLOGY FEATURES FD0251b FD0255b Smart motor driver with embedded Hall sensor Motor driver with integrated Hall sensor Halogen High current driving capability Free Lock-shutdown protection & auto-restart function Built-in FG(frequency generation) signal output “Soft-switch” phase-switching technique to reduce vibration and acoustic noise Thermal shutdown protection PWM speed control(only available for FD0255b) Available in both T825(FD0251b) and T826(FD0255b) packages GENERAL DESCRIPTION FD0251b/FD0255b is a single coil motor driver with embedded Hall sensor. It integrates the motor driver with the Hall sensor, which simplifies the PCB(printed circuit board) design and make the fabrication of small-size motors possible. Lock-shutdown and auto-restart function keeps the motor from being over-heated and restarts the motor after being locked. FD0251b and FD0255b are built-in the signal output of rotation speed function, the system could detect the rotation speed of motor when using FD0251b and FD0255b. “Soft-switch” phase-switching technique is used to reduce the vibration and acoustic noise. Thermal-shutdown protection ensures the motor driver to operate under specified temperature ranges. All the protection mechanisms mentioned above combine to provide a complete protecting scenario for the motor system, keep the motor system from possible damages and guarantee correct operations. BLOCK DIAGRAM Bias Generator Hall Plate Chopper amplifier PWM control Coil Dr...