Gate Driver IC for Automotive Brushed Motors

This is a 2ch half-bridge (H-bridge) gate driver IC with the minimum functions required for automotive applications.
Compatible with body systems in general that use brushed motors.
In particular, by converting a system that uses mechanical relays to drive motors to semiconductors, high reliability and miniaturization can be achieved.

• Contributing to Simplified System Design with Compact Functions
• Use of small packages (VQFN24) to help reduce the size of ECU's ^{[Note 1]}
• Contributes to switching from mechanical relays to semiconducting (MOSFET) 

In recent years, there has been an increase in the demand for motors per vehicle due to the increasingly electrified moving parts of automotive equipment, which had been mechanical. The number of drivers driving motors is also increasing, and the system is becoming smaller and more integrated. Some motor applications require no rotational speed control, and a driver with limited functions and performance is required.
We are working to strengthen our product lineup to meet this demand, and TB9103FTG introduced here is part of this enhancement (Table 1).

Table 1. Lineup of Gate Driver IC for Automotive Brushed Motors

TB9103FTG is a gate-driver IC for controlling the external Nch-MOSFET that drives the brushed motors. In addition, various abnormal conditions (VDS, VGS, overtemperature, power supply, setting, etc.) are outputted at DIAG terminal. There are two DIAG jacks, which can be used to determine which channel of a half-bridge with two channels has an error.

The QFN package is used to realize the small size of this product. Also, by hiding the corner pins that have GND potential in the mold resin, the risk of malfunctions due to short failures between pins is reduced.

Advantages of switching from mechanical relays to semiconductors (MOSFETs) include quiet operation (no relay noise), high reliability (long life), and small size (small mounting area).
The following figure (Figure 3) illustrates the image.

The power supply (VB, VCC) is intended for use with a 12V battery system. The guaranteed chip temperature range is -40℃ to 150℃, which corresponds to Grade1 in the AEC-Q100 ^{[NOTE 3]}.
This product is equipped with a charge pump that can drive an external Nch-MOSFET. The main specifications are shown below (Table 2).

MODE setting:
Two types of mode selectable: H-bridge mode /Half-bridge mode

VDS Detect Level Setting:
This is the setting of the function to monitor abnormalities in the drain-source voltage of external Nch-MOSFETs.
The detection level can be set in 4 steps (disable function, 0.3V, 0.6V, 0.9V).

To enable customers to easily verify the characteristics of the TB9084FTG, we provide evaluation boards on free of charge. Of course, engineering samples can be submitted. Please contact our sales staff or our business partners at your service.
The size of the evaluation board is 95mm×75mm.
For customer convenience, switches, jumpers, and connectors are mounted as appropriate.

Toshiba is currently working to enhance a product lineup of ICs that control motors for automotive equipment. We will contribute to the electrification of automotive equipment and the improvement of comfort by introducing products to the market that optimize the functions and performance built into ICs to meet customers' needs.