Toshiba Launches 3 Phase Brushless Sensorless Motor Pre-Driver IC – Sep 27, 2013– Tokyo, Japan (Techreleased) – Toshiba Corporation today announced that it has launched a 3-phase brushless[1] sensorless motor[2] pre-driver IC for automotive applications, “TB9061AFNG”. Sample shipments will start in October, with mass production scheduled to start in March, 2014.

TB9061AFNG
TB9061AFNG

The engines of cars equipped with an idling reduction system cut out when the system is activated, and the power source for oil pumps and engine cooling pumps must be shifted from the engine to the motor. The new IC incorporates Toshiba’s original brushless motor drive control circuit that can control motors without using heat-sensitive hole sensors[3], securing control of pumps in a very hot environment. The product also contributes to materials and cost reductions.

Key Features

Sensorless motor drive
120-degree rectangular wave motor control is realized by an input signal line that measures the induced voltage[4] of the motors and three-phase motor output. The IC does not require external hole sensors, contributing to simple system configuration and smaller PCB size.
Motor rotation can be controlled by the DC input signal or the PWM input signal.
Efficient motor drive control by lead angle[5] setting
Selection of preliminary programmed lead angle setting offers improvement of motor drive efficiency.
A built-in automatic return control functions reduces motor stops caused by external control in DC input control mode.

Main specifications

Part Number TB9061AFNG
Mass Production March, 2014
Mass Production Volume 1 Million pieces per year
Channels 6 channels (high side: 3 channels, low side: 3 channels)
Operating Voltage Range +5.5 to 18V
Operating Temperature Range -40 to 125°C
Input Signal Compatible with both external PWM duty input and DC input control
Drive Control Motor drive overcurrent detection circuit, the motor drive current limiter circuit, VCC overvoltage detection circuit, IC internal overheat detection circuit, external temperature anomaly detection circuit, step-out detection and automatic return control circuit.
Detection Circuits Over current detection, over temperature detection, over voltage detection, low voltage detection of VCC, internal and external temperature detection, external temperature limiter circuit and motor lock detection
Diagnostic Circuits Having the function of determining an abnormality such as a motor lock detection and rotational speed.
Package SSOP24 (7.8mm × 7.6mm × 1.2mm)

 

Notes:

  • [1]: Motors without commutator (brush).
  • [2]: Motors that acquire rotary position by comparing motors virtual midpoint voltage and induced voltage generated in drive coils.
  • [3]: A magnetic sensor to detect rotary position and rotation speed.
  • [4]: Voltage generated in the coil when turning the motor
  • [5]: A method to improve the efficiency of the motor by adjusting the phase difference between the voltage and current