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22 Powering Up Your Design Brushless Motors Gain Traction Brushless DC (BLDC) motors have become the default choice of motor for a wide range of battery and line-powered equipment and appliances. More reliable and requiring significantly less maintenance than their brushed DC motor counterparts, brushless DC motors have benefited from a broader industry understanding of how to control them using simple microcontroller algorithms. In today's complex and sophisticated control applications, brushed motors also create too much electrical noise, which means designers need to employ substantial electromagnetic immunity mitigation techniques. Audible noise from brushed motors is now considered undesirable, particularly for portable battery- powered appliances such as vacuum cleaners and personal power tools, including jigsaws and drills/drivers. Solving BLDC Controller Design Challenges with the Qorvo PAC5556 Robert Huntley for Mouser Electronics Brushless DC motors have become a popular choice for use in a wide range of consumer and industrial appliances. Building a controller for a BLDC requires several key functions, all of which are combined in the single-package Qorvo PAC5556 Power Application Controller ® (PAC™).