Description
The MTD6505 device is a 3-phase, full-wave sensorless driver for brushless DC (BLDC) motors. It features 180° sinusoidal drive, high-torque output and silent drive. With the adaptive features, parameters and wide range of power supplies (2V to 5.5V), the MTD6505 is intended to cover a broad range of motor characteristics, while requiring minimum external components. Speed control can be achieved through either PSM or PWM.

Features
• 180° Sinusoidal Drive for High Efficiency and Low Acoustic Noise
• Position Sensorless BLDC Drivers (no Hall Effect Sensor required)
• Integrated Power Transistors
• Supports 2V to 5.5V Power Supplies
• Programming Resistor (RPROG) Settings to Fit Motor Constant (KM) Range from 3.25 mV/Hz to 52 mV/Hz
• Direction Control:
   - Forward direction: connect DIR pin to GND or leave floating
   - Reverse direction: connect DIR pin to VBIAS or 3V
• Speed Control through Power Supply Modulation (PSM) and/or Pulse-Width Modulation (PWM)
• Built-in Frequency Generator (FG Output Signal)
• Built-in Lockup Protection and Automatic Recovery Circuit
• Built-in Overcurrent Limitation
• Built-in Thermal Shutdown Protection
• Built-in Overvoltage Protection
• No External Tuning Required
• Available Package: 10-Lead 3mm x 3mm UDFN

Applications
• Notebook CPU Cooling Fans
• 5V 3-Phase BLDC