Chip Design of Three-Phase BLDC Motor Brake Driver IC

This paper proposes a three-phase BLDC motor brake driver IC. The driver contains five major units that are hall-signal-process-unit, logic-control-unit, speed-control-unit, brake-control-unit and power-driver-unit. First, motor speed is used PWM that can be controlled by frequency instead of traditional voltage control method. Moreover, a new brake structure using frequency-to-voltage converter (FVC) is also developed. Experimental results show that this new structure can achieve PWM control and make motor turn off effectively. Eventually, we have designed this new deriver IC using TSMC CMOS 0.35μm 2P4M technology.