H-bridge driver ICs suit battery-powered devices
Expanding its range of H-bridge driver ICs for brushed DC and stepper motors, Toshiba Electronics Europe has announced the TC78H620FNG, which is suited to battery-powered mobile devices - such as fans and small printers - and home appliances. The IC adopts a four-port interface control technique using the PHASE and ENABLE signals.
Control is secured using just three ports, unlike previous devices that required all four ports for full step control of a stepper motor. This addresses challenges in applications where the lack of MCU control ports is an issue.
The TC78H620FNG is compatible with low-voltage drives (for motor drive: 2.5V and above, for logic control: 2.7V and above) making it suitable for mobile devices with a 3.7V Li-ion battery drive. Either two DC brushed motors or a single stepping motor can be controlled. A maximum current consumption of 1µA in standby mode contributes to reduced power consumption.
Toshiba’s driver is supplied in a compact SSOP16 package that permits a smaller mounting area and helps reduce the size and cost of boards. Built-in motor protection and safety features include overcurrent detection, thermal shutdown and under-voltage lockout functionality. In addition, shoot-through current protection supports motor control without needing to consider deadtimes when switching output ON and OFF.
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