H-bridge drivers for brushed DC motors boost efficiency

Toshiba Electronics Europe GmbH has launched two single-channel H-bridge drivers for brushed DC motors, designated the TB67H453FNG and TB67H453FTG.

Suitable for a wide range of DC motor driver applications and designed to optimise efficiency, the H-bridge drivers feature maximum motor output ratings of 50-V and 3.5-A.

A built-in current monitoring function enables real-time feedback, allowing external devices such as CPUs and microcontrollers to track the load current and adjust control signals dynamically, optimising motor performance under varying conditions. In addition, the current monitoring can detect torque changes and react accordingly, for example, when an endpoint is reached. The result is superior energy efficiency with precise motor operation and fewer external components, meeting the growing demand for smarter, more adaptable motor control in consumer and industrial equipment.

The H-bridge drivers offer a variety of error detection features, including overcurrent detection (ISD), which shuts down the output stage if the motor current exceeds a predefined limit. A fault signal indicates this abnormally high current in the motor coils and can also help to detect issues during operation, supporting predictive maintenance.

Operational motor power supply range spans 4.5 V to 44, making the H-bridge drivers suitable for a wide range of applications, from battery-powered devices to equipment using commercial power sources. Ultra-low current consumption in sleep mode, capped at 1μA, further enhances energy savings.

In addition, a half-bridge independent control mode unlocks new opportunities beyond motor control, enabling the use of these drivers in devices such as smart meters.

The TB67H453FNG is housed in an HTSSOP package measuring 5.0- × 6.4-mm, while the TB67H453FTG is housed in a VQFN package measuring 3.0- × 3.0-mm. Both packages have an exposed thermal pad for enhanced thermal performance and reliability.