MTD6505T-ENA Microchip

MTD6505 3-Phase Sinusoidal Sensorless Brushless Motor Driver Features Description 180 Sinusoidal Drive for High Efficiency and Low The MTD6505 device is a 3-phase, full-wave Acoustic Noise sensorless driver for brushless DC (BLDC) motors. It features 180 sinusoidal drive, high-torque output and Position Sensorless BLDC Drivers silent drive. With the adaptive features, parameters and (no Hall Effect Sensor required) wide range of power supplies (2V to 5.5V), the Integrated Power Transistors MTD6505 is intended to cover a broad range of motor Supports 2V to 5.5V Power Supplies characteristics, while requiring minimum external Programming Resistor (R ) Settings to Fit PROG components. Speed control can be achieved through Motor Constant (K ) Range from 3.25 mV/Hz to M either PSM or PWM. 52 mV/Hz The compact packaging and the minimal bill of Direction Control: materials make the MTD6505 device extremely - Forward direction: connect DIR pin to GND or cost-efficient in fan applications. For example, the CPU leave floating cooling fans in notebook computers require designs - Reverse direction: connect DIR pin to V that provide low acoustic noise, low mechanical BIAS or 3V vibration, and are highly efficient. The frequency generator (FG) output enables precision speed control Speed Control through Power Supply Modulation in closed-loop applications. (PSM) and/or Pulse-Width Modulation (PWM) Built-in Frequency Generator (FG Output Signal) The MTD6505 device includes Lockup Protection mode to turn off the output current when the motor is in a lock Built-in Lockup Protection and Automatic condition, with an automatic recovery feature to restart Recovery Circuit the fan when the lock condition is removed. Motor Built-in Overcurrent Limitation overcurrent limitation and thermal shutdown protection Built-in Thermal Shutdown Protection are included for safety-enhanced operations. Built-in Overvoltage Protection The MTD6505 is available in a compact, thermally- No External Tuning Required enhanced, 10-lead 3 mm x 3 mm UDFN package. Available Package: 10-Lead 3mm x 3mm UDFN Package Types Applications MTD6505 3x3 UDFN* Notebook CPU Cooling Fans 5V 3-Phase BLDC 1 FG 10 PWM R 2 DIR PROG 9 EP V 3 V BIAS 8 DD 11 4 OUT1 7 OUT3 5 6 OUT2 GND *Includes Exposed Thermal Pad (EP) see Table 3-1. 2011-2014 Microchip Technology Inc. DS20002281C-page 1MTD6505 Functional Block Diagram V BIAS V FG DD V DD OUT3 CPU + Peripherals OUT2 OUT1 PWM DIR GND Thermal Short-Circuit Protection Protection Nonvolatile Memory Motor Phase Overcurrent Adjustable Detection Protection R PROG K M Circuit R Sense PROG DS20002281C-page 2 2011-2014 Microchip Technology Inc. Output Drive Circuit