MTD6508T-E/NA

The MTD6508 device is a 3-phase, full-wave sensorless driver for brushless DC (BLDC) motors. It features a 180° sinusoidal drive, high torque output and silent drive. With adaptive features, parameters and a wide range of power supplies (2V to 5.5V), the MTD6508 is intended to cover a broad range of motor characteristics while requiring minimum external components. Speed control can be achieved through either power supply modulation (PSM) or pulse-width modulation (PWM).

Compact packaging and a minimal bill of materials make the MTD6508 device extremely cost-efficient in fan applications. For example, the CPU cooling fans in notebook computers require designs that provide low acoustic noise, low mechanical vibration and are highly efficient. The frequency generator (FG) output enables precision speed control in closed-loop applications.

The MTD6508 device includes Lock-up Protection mode to turn off the output current when the motor is in a lock condition, with an automatic recovery feature to restart the fan when the lock condition is removed. Motor overcurrent limitation and thermal shutdown protection are included for safety-enhanced operations.

The MTD6508 is available in compact, thermally enhanced, 10-Lead 3 mm x 3 mm x 0.5 mm UDFN packages and 16-Lead 4 mm x 4 mm x 0.5 mm UQFN packages.

• 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
• Variable Programming Resistor (RPROG) Setting to fit Motor Constant (KM) Range from 3.25 mV/ Hz to 52 mV/Hz
• Speed Control through Power Supply Modulation (PSM) and/or Pulse-Width Modulation (PWM)
• Built-in Frequency Generator: FG, FG/3 Output Signal (FG/2 and FG/6 Option are available upon request)
• Output PWM Slew Rate Control Programmable with an External Resistor for Start-up (Adjustable version)
• Phase Target Selection for Regulation (Adjustable Version)
• Start-up Strength Selection (Adjustable Version)
• Start-up Output Current Controlled by PWM
• Output Current Soft Start
• Built-in Lock-up Protection and Automatic Recovery Circuit
• Built-in Overcurrent Limitation
• Built-in Thermal