Motor Control and Switchgear

Brushless DC motor control design for industrial and home appliances

26 April 2021

Renesas Electronics Corporation has expanded its motor control solutions portfolio with two system-in-package (SiP) solutions to simplify brushless DC (BLDC) motor control design for a wide range of cordless battery-powered applications such as power tools, drones, water pumps, vacuums, cleaning robots, fans and other systems. Combining multiple functions into an SiP solution, the new RAJ306001 and RAJ306010 motor drive integrated circuits (ICs) deliver improved low-speed or high-speed rotation and high torque control compared with competitive solutions while minimizing required board space and reducing solution cost. This results in a turnkey design for easy, efficient and safe BLDC motor control.

The RAJ306001 and RAJ306010 are single-package motor control ICs that control three-phase BLDC motors used in a wide range of battery-powered devices. The ICs integrate an RL78/G1F microcontroller (MCU) and pre-driver into an 8 mm x 8 mm quad-flat no-leads package. The highly integrated SiP form factor allows customers to eliminate as many as 30 external components shrinking the solution area by up to 50% and with lower control system costs.

Source: Renesas Electronics CorporationSource: Renesas Electronics CorporationDesigned with heat management in mind, the new ICs feature self-aligned dead time to prevent the shoot through and offer adjustable pre-driver output current capacity — up to 500 mA — to drive large-capacity metal oxide semiconductor field-effect transistors (MOSFETs), which makes heat dissipation design easier. This allows the ICs to drive MOSFETs at the optimum switching timing — reducing FET switching margin times to approximately 1/10 the time compared with conventional systems and enabling highly efficient motor drive control with reduced heat generation.

A new Renesas Solution Starter Kit (RSSK) is also available for developers working on a motor control solution using the RAJ306010 ICs. The new easy-to-use RSSK features a complete evaluation environment that includes a development board, motor and reference firmware, offering easy motor control debugging and allows customers to immediately begin evaluating their motor control design, executing real-time analysis and tuning to accelerate development.

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