MTD6501C/D/G 3-Phase Brushless DC Sinusoidal Sensorless Fan Motor Driver Features Description Position Sensorless BLDC Drivers (No Hall The MTD6501C/D/G devices are 3-phase, full-wave Sensor Required) drivers for brushless sensorless DC motors. They feature 180 sinusoidal drive, high torque output, and 180 Sinusoidal Drive, for High Efficiency and Low silent drive. Due to their adaptive features and wide Acoustic Noise power-supply range capabilities (2V to 14V), they are Support 2V to 14V Power Supplies intended to cover a wide range of motor characteristics, Speed Control Through PAM and/or PWM while requiring no external tuning from the user. Speed Built-in Frequency Generator (FG Output Signal) control can be achieved through either power supply Built-in Lock-up Protection and Automatic modulation or pulse-width modulation (using the PWM Recovery Circuit (External Capacitor not digital input pin). Necessary) Due to the compact packaging and minimum bill of Built-in Over Current Limitation and Short Circuit materials (power transistors incorporated, no Hall Protection sensor, no external tuning), they are best suited for low- Built-in Thermal Shutdown Protection cost fan applications requiring high efficiency and low acoustic noise, such as CPU cooling fans. Frequency Thermally Enhanced SOP-8 Package for generator output enables precision speed control in MTD6501C and MTD6501G (Maximum Output closed-loop applications. The MTD6501C/D/G drivers Current 800 mA) include a Lock-up Protection mode, which turns off the MSOP-10L Package for MTD6501D (Maximum output current when the motor is under lock condition, Output Current 500 mA) and an automatic recovery that enables the fan to run 20 kHz PWM Output Frequency for MTD6501C/D when the lock condition is removed. Motor overcurrent and 23 kHz for MTD6501G limitation, short-circuit protection and thermal- Boost Mode (Optional Back Electromotive Force shutdown protection are also included. (BEMF) Pre-amplification in MTD6501D) The MTD6501C and the MTD6501G are available in a No External Tuning Required compact thermally-enhanced SOP-8 package, while the MTD6501D is available in the MSOP-10L package. The MTD6501C/D/G devices are formerly products of Advanced Silicon. Package Types MTD6501C, MTD6501G SOP-8 PWM FG 1 8 V 2 7 V CC DD OUT3 OUT1 3 6 GND OUT2 4 5 MTD6501D MSOP PWM FG 1 10 BOOST GND 2 9 V V DD 3 8 CC OUT1 OUT3 4 7 OUT2 GND 5 6 2010-2012 Microchip Technology Inc. DS22263B-page 1MTD6501C/D/G Functional Block Diagram BOOST*MTD6501DOnly V CC V REF Motor Phase Detection Circuit Regulator V DD Overcurrent protection V CC FG Timing OUT3 Controller V DD OUT2 OUT1 PWM PWM Input GND Thermal Short-circuit protection protection DS22263B-page 2 2010-2012 Microchip Technology Inc. Soft Switching Drive Output Drive Circuit