SmartMCD™ Series Product TB9M003FG, Integrating a Microcontroller and Motor Driver

The TB9M003FG is designed to contribute to the miniaturization and cost reduction of automotive motor systems and is well-suited for applications utilizing three-phase brushless DC (BLDC) motors, including electric water pumps, electric oil pumps, electric fans, and electric blowers.

As part of efforts to achieve carbon neutrality, the electrification of automobiles is accelerating. Automotive motor systems that support this trend are required to be compact and cost-effective. Consequently, motor drivers—key components of these systems—must also be miniaturized and affordable.
In addition, as the electrification of automobiles rapidly progresses, electrification is also being applied to areas beyond propulsion systems, with the aim of improving fuel efficiency and reducing environmental impact. Among these advancements, vector control—also known as Field Oriented Control (FOC)—is gaining attention as a key motor control technology and is increasingly being adopted. FOC enables high torque, quiet operation, and efficient motor control, significantly contributing to the performance enhancement of electric vehicles.

To meet these market demands, we have developed the TB9M003FG as part of our SmartMCD series, offering an integrated solution that combines a microcontroller and motor driver. This product integrates a microcontroller, a motor gate driver, and peripheral components such as power supply and communication interfaces into a single chip. As a result, it contributes to the miniaturization of ECU boards and systems, simplifies board and system design, and enhances implementation quality.
Furthermore, with Toshiba’s proprietary vector engine (VE) for vector control, the TB9M003FG enables sensorless one-shunt vector control (FOC) even with a compact Arm® Cortex®-M0 CPU and a 40MHz system clock.
Compared to the conventional three-shunt method, which uses three resistors to measure motor current, the one-shunt method uses only one resistor, reducing component area and cost, thereby contributing to the miniaturization and cost reduction of automotive motor systems.

Key Features

Feature Details

1. Single-Chip Integration

Traditional motor control systems consist of separate semiconductor components for microcontrollers,  motor gate drivers, power supplies, and communication interfaces. The TB9M003FG integrates all these into a single chip, contributing to system miniaturization, simplified design, and improved implementation quality.

The TB9M003FG, a single-chip integrated solution
Figure 1. The TB9M003FG, a single-chip integrated solution

2. Sensorless One-Shunt Vector Control

2-1. Sensorless Control with a Single Shunt Resistor:

While motor angle is typically detected using sensor devices such as Hall sensors, this product adopts a sensorless method that estimates the motor angle based on measured motor current. Additionally, whereas conventional systems measure the three-phase motor currents using three separate resistors, this product achieves three-phase current detection by using  only a single resistor. This is made possible by optimizing the PWM waveform used for motor control and the timing of current detection. As a result, it contributes to reduced component area and cost, supporting further miniaturization and cost reduction.

Three-Phase Motor Current Detection Using a Single Shunt Resistor
Figure 2. Three-Phase Motor Current Detection Using a Single Shunt Resistor

2-2. Toshiba’s Proprietary Vector Engine (VE):

The algorithm and techniques described in section 2.1 above are incorporated into Toshiba's proprietary Vector Engine (VE). This enables vector control that could not be processed within the control cycle by a compact CPU, making it possible to achieve advanced vector control even with a compact CPU such as the Arm® Cortex®-M0 running at a system clock of 40MHz.

Toshiba's Proprietary Vector Engine (VE) Block Diagram
Figure 3. Toshiba's Proprietary Vector Engine (VE) Block Diagram
VE Integration Enables Control Cycle Processing Even on Compact CPUs
Figure 4. VE Integration Enables Control Cycle Processing Even on Compact CPUs

3. Software Development Package

Our company has prepared the following components required for software development.

3-1. Motor Control Reference Software:

The "Motor Control Reference Software" provided by our company contributes to the system development of customers' mass-production products. It enables more efficient software development and helps shorten the overall development period.

3-2. Model-Based Development (MBD) Environment:

By using our "MBD Development Environment," it is possible to simulate systems using our "Motor Control Reference Software."
Our Model-Based Development (MBD) environment includes a "Hardware Blockset" within the control model, which emulates the functional characteristics of motor control hardware. When used together with the provided control model, this enables system simulations that closely approximate real-hardware validation.

TB9M003FG Model-Based Development Environment Overview
Figure 5. TB9M003FG Model-Based Development Environment Overview

3-3. Auto-Tuning System:

An evaluation kit comprising a PC-based tool and a firmware-equipped control board is available. This setup allows for automatic tuning of motor control parameters

Auto-Tuning System Composed of PC Tool and Firmware
Figure 6. Auto-Tuning System Composed of PC Tool and Firmware

Applications

For Automobiles

  • Electric Water Pumps
  • Electric Oil Pumps
  • Electric Fans
  • Electric Blowers

Product Specifications

Part Number TB9M003FG
Supported Motor 3 Phase Brushless DC Motor
Main Functions Gate Driver, Charge Pump, One-Shunt Current Detection Amplifier, 12-bit ADC, Vector Engine, Programmable Motor Driver, LIN PHY
Main Anomaly Detection Features Under-voltage, Over-voltage, External Power MOSFET Open/Short, Overheat
Absolute Maximum Ratings Spply Voltage Vbat (V) -0.3 to +40
Operating Range Supply Voltage Vbat (V) 6 to 18
Operating Temp. Topr (℃) Ta=-40 to 150
Tj=-40 to 1 75
Package Name P-HTQFP48-0707-0.50-001
Size (mm) Typ. 9.0×9.0
Reliability AEC-Q100 (Grade 0) qualified

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