Toshiba Announces Sample Availability of Gate Driver for Bridge Circuits Driving High-Current Automotive Brushed DC Motors

KAWASAKI, Japan–(BUSINESS WIRE)–Toshiba Electronic Devices & Storage Corporation (“Toshiba”) has started providing engineering samples of “TB9104FTG,” a gate driver^[1] for bridge circuits used in high-current automotive brushed DC motors, suitable for body system applications such as power back doors, power sliding doors, and power seats.

The accelerating electrification of movable components in vehicles has increased the number of motors installed in vehicles, particularly motors for body system applications. This trend has also increased the number of drivers required for motor operation, and is creating demand for more compact systems. Wire harnesses must be reduced to meet requirements for lighter vehicles.

TB9104FTG adopts a small VQFN32 package with typical dimensions of 5.0mm×5.0mm. An exposed thermal pad on the underside of the package enhances thermal performance, and when combined with external MOSFETs, this enables a compact drive circuit for high-current brushed DC motors in body system applications.

The new product has a serial peripheral interface (SPI)^[2] for interfacing with microcontrollers, providing numerous configuration options and status information. Notably, rotation commands for the motor can be issued not only through dedicated pins but also via SPI. By connecting multiple gate drivers to the SPI bus, wiring can be shared, contributing to wire harness reduction.

TB9104FTG also features a built-in PWM drive circuit. Designed for environments with multiple devices connected via SPI, it enables continuous motor operation based on a preset PWM drive cycle with just a single rotation command from the microcontroller. This helps reduce the load on the microcontroller and alleviates congestion on the SPI bus.

As a device handling high current, TB9104FTG ensures safety by integrating a high-precision current sense amplifier that monitors motor drive current. By feeding the amplifier’s output back to the microcontroller, precise drive-stop control can be executed when abnormal current occurs. The product also features other abnormality detection and drive-stop functions.

Toshiba will expand the lineup of driver ICs for automotive motors, contributing to the electrification and enhanced safety of automotive equipment.

Notes:
[1] Gate driver: Driver for driving MOSFETs
[2] Serial peripheral interface (SPI): A synchronous serial communications protocol for sending and receiving data.

Applications

Automotive body systems

• To drive high-current brushed DC motors used in applications such as power back doors, power sliding doors, power windows, and power seats.

Features

• Small, high heat-dissipation VQFN32 package
• SPI for interfacing with the microcontroller
• Built-in PWM drive circuit
• Various abnormality detection functions

Main Specifications

Part number			TB9104FTG
Supported motors			Brushed DC motor
Number of output channels			One channel (when used as H-bridge)/two channels (when used as half-bridge)
Main functions			Standby function, dead time control, PWM drive
Main abnormal detections			Power supply low voltage detections, charge pump overvoltage detection, overheat detection, VDS detection of external MOSFETs, SPI error detection
Absolute maximum ratings (Ta=-40 to 125°C)	Power supply VB voltage 1 Vvb1a (V)		-0.3 to 18
	Power supply VB voltage 2 Vvb2a (V)		18 to 40 (within one second)
	Power supply VCC voltage Vvcc1a (V)		-0.3 to 6.0
	Power supply VDD voltage Vvdd1a (V)		-0.3 to 6.0
	Ambient temperature Ta (°C)		-40 to 125
Operating ranges (Ta=-40 to 125°C)	Operating power supply voltage1 VvbRNG (V)		5.7 to 18
	Operating power supply voltage2 VvccRNG (V)		4.5 to 5.5
	Operating power supply voltage3 VvddRNG (V)		4.5 to 5.5
	Operating junction temperature TjRNG (°C)		-40 to 150
Package	Name		P-VQFN32-0505-0.50-009
	Size (mm)	Typ.	5.0×5.0
Reliability			AEC-Q100 (Grade 1) qualified (scheduled)

Follow the link below for more on the new product.
TB9104FTG

Follow the link below for more on Toshiba’s automotive brushed DC motor driver ICs.
Automotive Brushed DC Motor Driver ICs

* Company names, product names, and service names may be trademarks of their respective companies.
* Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.

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