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MTD6505 Datasheet(PDF) 1 Page - Microchip Technology |
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MTD6505 Datasheet(HTML) 1 Page - Microchip Technology |
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1 / 20 page  2011 Microchip Technology Inc. DS22281A-page 1 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) setting 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 Over Voltage Protection • No External Tuning Required • Available Package 10-Lead 3mm x 3mm UDFN Applications • Notebook CPU Cooling Fans • 5V 3-Phase BLDC Motors 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 power supply modulation (PSM) or pulse-width modulation (PWM). The compact packaging and the minimal bill-of- material make the MTD6505 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 MTD6505 device includes Lockup 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 MTD6505 is available in a compact, thermally enhanced, 3mm x 3mm 10-lead UDFN package. Package Types MTD6505 3x3 UDFN* VBIAS RPROG OUT2 FG PWM DIR VDD GND 1 2 3 5 10 9 8 6 OUT1 OUT3 4 7 EP 11 *Includes Exposed Thermal Pad (EP); see Table 3-1. Sinusoidal Sensorless 3-Phase Brushless DC Fan Motor Driver MTD6505 |
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