Compact H-bridge IC for low voltage drives. Free Technical Library News

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Compact H-bridge IC for low voltage drives

24.05.2016

Toshiba Electronics Europe has introduced a new product in its H-bridge (H-shaped) driver IC series for brushed DC motors and stepper motors. TC78H620FNG is suitable for battery-powered mobile devices such as fans and small printers, as well as home appliances.

The new IC uses a four-port interface control method with Phase and Enable signals. Only three ports are required for control, unlike previous devices that required all four ports to implement full stepper motor control. Thanks to this, it becomes possible to solve the problem of the lack of a sufficient number of microcontroller control ports, the company explained.

The TC78H620FNG driver is compatible with low voltage drives (motor drive: 2,5V and above, logic control: 2,7V and above), so it can be used in mobile devices powered by a 3,7V Li-ion battery drive .It is possible to control two DC commutator motors or one stepper motor. The maximum standby current draw of 1µA helps to reduce power consumption.

Toshiba's new driver comes in a compact SSOP16 package that requires a smaller footprint and reduces PCB size and cost, the company said. Built-in motor protection and safety features include overcurrent detection, thermal shutdown and low voltage lockout. In addition, through current protection provides motor control without having to consider dead time when turning the outputs on and off.

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