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Toshiba Starts Commercial Sample Shipments of Gate Driver IC for Three-Phase Brushless DC Motors in Diverse Automotive Applications
Toshiba Electronic Devices & Storage Corporation ("Toshiba") has today started to provide commercial samples[1] of a gate driver[2] IC, "TB9084FTG,” for three-phase brushless DC motors that drive essential on-board functions, including automotive body system applications[3], electric pumps, and motor generators[4].
In recent years, the electrification of automotive components with moving functions has accelerated, leading to a steady increase in the number of motors used per vehicle. Among these, the increase in motors used for body system applications is particularly notable. This transition has also advanced the replacement of brushed DC motors with quieter and longer-lasting brushless DC motors.
The TB9084FTG is designed to reinforce this shift. It offers the minimum required gate driver IC functions for automotive applications, and supports a wide range of automotive motor applications in combination with external devices, such as MOSFETs, power supply ICs, microcontrollers, and communication PHY[5]. Any change in customer system requirements can be supported by replacing corresponding external devices, contributing to flexibility in system design.
Minimizing functions allows utilization of one of the small packages, the 6×6mm VQFN36[6], and contributes to equipment miniaturization. The package also has a wettable flank[7] structure, facilitating easy visual inspection to confirm the reliability of soldered joints.
In addition, the TB9084FTG complies with the AEC-Q100 Grade 0[8] reliability testing standards for automotive electronic components, meeting the stringent quality requirements for automotive applications.
Toshiba will continue to expand its lineup of gate driver ICs by assessing market needs and optimizing product functions. It will introduce new products that extend the electrification and improve the safety of automotive equipment.
Notes:
[1] This sample is equivalent to a mass-produced product and is used for final evaluations such as reliability testing. Its reliability is guaranteed, just like that of mass-produced products.
[2] A driver to drive MOSFETs.
[3] Applications such as power sliding doors, power tailgates (power back doors), power seats.
[4] An application that integrates the power improvement (motor) and the power generation function (generator) of a hybrid vehicle.
[5] PHY (Physical): An interface in the physical layer within the automotive communication standard.
[6] VQFN: Very thin quad flat no leaded package
[7] The form of lead side of package. A terminal structure that allows automatic visual inspection (AVI) of installation on boards.
[8] Grade 0 corresponds to the most demanding thermal conditions, with an operating temperature range of -40 to +150°C, as defined in the AEC-Q100 quality and reliability standards for automotive electronic components.
Features
Explanation of Features
1. Contributes to system design flexibility
The TB9084FTG is intended to be used as a gate driver IC within an ECU[9] composed of discrete components, including a microcontroller, gate driver IC, N-channel MOSFETs, power supply IC, and communication PHY, as shown in Figure 1.
Any change in system requirements can be supported by replacing corresponding devices, contributing to flexibility in system design.
2. Small 6×6mm package with minimized functions to help reduce equipment size
To minimize the size of each component in an ECU composed of discrete components, the TB9084FTG reduces the number of pins and chip size. Accordingly, the VQFN36 package has been adopted, featuring a compact 6×6 mm size with a mounting area of 36 mm². This package incorporates only the essential functions required for the following automotive applications.
- Drive circuit for three-phase brushless DC motor
- Functions to support system abnormality detection and protection, such as the power supply under voltage detection, charge pump over voltage detection and thermal shutdown
- Operational amplifier (1 channel) for current monitoring
In addition, SPI communication can be used to configure various settings and monitor system status.
UV stands for Under Voltage detection, OV for Over Voltage detection, TSD for Thermal Shut Down, OSC for Oscillator, RPP for Reverse Polarity Protection, SPI for Serial Peripheral Interface, OPAMP for Operational Amplifier, and MCU for Microcontroller Unit.
3. Improved mounting reliability through the use of a package with a wettable flank structure
The bottom of the package features a wettable flank structure to enhance mounting reliability and facilitate inspection. Additionally, the square pin with GND potential is embedded within the mold resin, reducing the risk of malfunction caused by short-circuit failures between pins.
Note:
[9] ECU: ECU stands for electronic control unit, a device in which electronic components are mounted on a circuit board.
Applications
- Automotive equipment
Body system applications, electric pumps, motor generators, etc.
Main Specifications
| Part number | TB9084FTG | |
|---|---|---|
| Supported motors | Three-phase brushless DC motors | |
| Number of channels for three-phase bridges / half-bridges |
One channel / Three channels | |
| Main functions | Six-channel gate-driver functions (sink-and-source), One-channel gate-driver function (source only), Operational amplifier for one-channel motor current sensing, SPI communication, Motor emergency stop function |
|
| Main abnormal detections | Power supply under voltage detection, charge pump over voltage detection, over temperature detection, VDS detection of MOSFET, SPI communication abnormality detection |
|
| Absolute maximum ratings (Ta=25°C, unless otherwise specified) |
Power supply voltage VB Vb (V) |
-0.3 to 28 (DC) |
| 28 to 40 (≦1s) | ||
| Power supply voltage VCC Vcc (V) |
-0.3 to 6 | |
| Operating ambient temperature Ta (°C) |
-40 to 150 | |
| Operating range (Tj=-40 to 175°C) |
Power supply voltage VB Vb (V) |
5.7 to 28 |
| Power supply voltage VCC Vcc (V) |
3.0 to 5.5 | |
| Package | P-VQFN36-0606-0.50 | |
| Reliability | AEC-Q100 (Grade 0) qualified | |
Follow the link below for more on the new product.
TB9084FTG
Follow the link below for more on Toshiba’s products for automotive brushless motor driver ICs.
Automotive Brushless Motor Driver ICs
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