Trapezoidal control BLDC motor drivers offer high-speed applications

Texas Instruments MCT8316Ax High-Speed Sensorless Trapezoidal Control BLDC Motor Drivers, available now from Mouser, offer single-chip, code-free, sensorless trapezoidal solutions for applications needing high-speed operation (up to 3kHz electrical) or swift startup times (<50ms capable) for 12V to 24V BLDCs up to 8A peak current.

The device integrates three 1/2H bridges with 40V absolute maximum capability and a very low RDS(ON) of 95mOhm (high-side plus low-side). Power management features of an adjustable buck regulator and LDO generate the device's 3.3V or 5V voltage rails and can power external circuits. The sensorless trapezoidal control is highly configurable through register settings (MCT8316AV) or hardware pins (MCT8316AT), varying from motor startup behaviour to closed-loop operation. Register settings for the MCT8316AV component may be set in non-volatile EEPROM allowing the device to operate stand-alone once configured. These devices receive a speed command through a PWM input, analog voltage, or I2C command.

Typical applications include BLDC motor modules, robotic vacuum suction motors, motorcycle fuel pumps, appliance fans and pumps, automotive fans and blowers, and medical CPAP blowers.