Three-phase BLDC pre-driver IC features sensorless sine-wave motor control

Suitable for server fans, pumps, blowers and suction motors for cordless and robotic vacuum cleaners the TC78B011FTG incorporates a sine-wave drive method that reduces both vibration and noise. Its sensorless design saves the space and cost of a Hall sensor. The built-in closed loop speed control regulates and maintains the motor’s rotational speed during dynamic power supply fluctuations and load variations without requiring an external microcontroller (MCU). Precise setting of a speed profile can be programmed into the built-in non-volatile memory (NVM).

Operating from a supply voltage ranging from 5.5 to 27V, the device includes selectable closed loop or open loop speed control. Speed can either be controlled through a PWM signal, analogue voltage or via the I²C interface. The I2C interface is also used to control various settings within the device. A standby function further improves overall system efficiency.

The TC78B011FTG is packaged in a P-WQFN36-0505-0.50-001 package with a footprint of just 5mm x 5mm and a height of 0.8mm.

Also available is Toshiba’s existing TC78B009FTG device, which uses trapezoidal control, allowing designers to select the most appropriate product depending on their preferred motor drive method.