Toshiba has launched 1-channel H-bridge drivers, TB67H453FNG and TB67H453FTG, with a current monitoring function for brushed DC motor control. The new products feature a motor output voltage rating of 50 V and a motor output current rating of 3.5 A. The packages are “TB67H453FNG” with HTSSOP16 and “TB67H453FTG” with VQFN16, featuring an exposed thermal pad for enhanced heat dissipation.
In recent years, a wide variety of motors have been used in consumer equipment, from large, high-output, high-torque motors to small, low-output, power-saving motors. A common requirement for these motors is improved efficiency through control. Previously, H-bridge drivers have monitored the current flowing through the load and have fed back to the control inside the H-bridge driver for efficient motor control. To further enhance efficiency, the new products integrate a current monitoring function that feeds back a signal corresponding to the load current to CPUs and microcontrollers. This enables CPU and microcontrollers to monitor the current flowing through the load in real-time. By optimizing the control signals sent to the H-bridge driver according to the load and driving conditions, motor control can be more efficient.
Additionally, the new H-bridge drivers feature a half-bridge independent control mode, enabling one H-bridge to be controlled as two half-bridges. This functionality extends their application beyond motors to include devices such as smart meters, in addition to brushed DC motors.
System block diagram of Toshiba existing product and new product
Features
- A signal corresponding to the load current can be output externally, enabling real-time feedback
- Wide operating range: Motor power supply (VM: 4.5V to 44V)
- IC current consumption in SLEEP mode: Maximum 1μA (Tj=25°C, VM=24V)
Applications
- Consumer equipment (cordless cleaners, cleaning robots, etc.)
- Industrial equipment (printers, scanners, financial terminals, smart meters, etc.)
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