Microchip announced the expansion of its sinusoidal, sensorless, three-phase BLDC fan motor driver portfolio with the MTD6505, a standalone, resistor-programmable driver that enables the selection of multiple back-EMF coefficient ranges.
This feature allows engineers to design for a wide variety of three-phase BLDC fan characteristics with a single device, allowing them to standardise multiple product lines on one driver and very few external components. Additionally, the driver comes in a 3 x 3 mm UDFN package with a 0,5 mm thickness for space-constrained applications such as thin laptops and tiny BLDC fans.
To enable high energy efficiency and quiet operation with low acoustic noise and mechanical vibration, the MTD6505 includes a 180° sinusoidal drive. Being a sensorless driver means that it eliminates the need for an external Hall-effect sensor. Additionally, the IC provides a number of on-chip protection features to preserve the motor’s life and avoid harmful operating conditions, including thermal shutdown, over-current limiting and lock-up protection.
Also available is the MTD6505 3-Phase BLDC Sensorless Fan Controller Demonstration Board (ADM00345), which integrates a three-phase BLDC fan and three MTD6505 plug-in modules. Additionally, a free GUI is available for download, to simplify fan monitoring and control with the onboard PIC microcontroller.
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