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Automotive Electronics

16.6V Sensorless Control Pre-Driver IC for Automotive BLDC Motors

Toshiba Electronic Devices & Storage Corporation announced the launch of a sensorless control pre-driver IC, TB9062FNG, for BLDC motors used in automotive applications, including electric pumps. Samples are available now, with mass production scheduled for December this year.

Primary applications for the pre-driver IC include automotive electric pumps including water pumps, oil pumps, and fuel pumps; and automotive electric fans.

The company says that the pre-driver IC can control BLDC motors with pulse-width modulation (PWM) only, thereby eliminating the need for high performance MCUs and software.

An automatic duty generation function adjusts the output PWM duty cycle to suit the battery voltage (Vbat) at startup, and a soft speed changing function prevents stalls by suppressing sudden changes in output PWM duty. These functions in TB9062FNG, which were absent from Toshiba’s earlier products, contribute to stable motor control.

TB9062FNG is controlled by a hard-wired logic circuit and therefore does not require any software development. Vbat over-voltage detection, Vbat under-voltage detection, over-current protection, and thermal shutdown circuits are also implemented. The operating temperature range is -40°C to 125°C, making it suited for automotive applications.

Main Features
  • Simplified motor control by hard-wired logic circuit.
  • Eliminates need for software development and secures motor control by PWM input only.
  • Automatic PWM duty control at startup
  • Stable motor rotation at startup is secured by adjusting the PWM duty to the VBAT.
  • Automatic soft speed changing control
  • Prevents stalls by suppressing sudden changes of output PWM duty cycle.
Specifications
  • Power supply voltage (operating voltage range): 6.5V to 16.6V
  • Operating temperature: -40℃ to 125℃
  • Package: SSOP24-P-300-0.65A (7.8mm × 7.6mm)
  • Drive control: Sensorless 120° commutation
  • Speed control input: PWM input signal
  • Abnormality detections: Vbat over-voltage detection; Vbat under-voltage detection; thermal shutdown circuit; current limitation
  • Reliability: Toshiba standard
  • Mass production: December 2019