Microchip announces the expansion of its sinusoidal, sensorless, 3-phase BLDC fan motor driver portfolio with the MTD6505, the industry’s first and only standalone, resistor-programmable driver that enables the selection of multiple back-EMF coefficient ranges. This unique feature allows engineers to design for a wide variety of 3-phase BLDC fan characteristics with a single cost-effective and flexible device, thus saving time and money by standardising multiple product lines on one driver and very few external components. Additionally, the low-cost driver comes in a 3x3 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-degree sinusoidal drive. Being a sensorless driver means that the MTD6505 eliminates the need for an external Hall-Effect sensor, reducing both cost and board space. Additionally, the driver 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. Microchip also announces the MTD6505 3-Phase BLDC Sensorless Fan Controller Demonstration Board (ADM00345). This demo board integrates a 3-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.
