Toshiba TC78S122FNG bipolar 2-channel stepping motor driver

Toshiba Corporation’s Semiconductor & Storage Products Company has launched TC78S122FNG, a bipolar 2-channel stepping motor driver offering a high voltage of 40 V and current of 2 A. The unit has a 2-channel drive function in a two-in-one chip and is capable of running two stepping motors simultaneously. Space can be saved on circuit boards by integrating electronic components as two-in-one chips.

Because of the heat generated by the ICs themselves, previous products could not achieve continuous operation in the driving current range of 2 A motors that are used in many applications, including office equipment. The motor driver can simultaneously drive two channels by reducing the output resistance by 50% to cut heat generation.

While the regulator circuit for the IC’s internal logic in the previous products was in operation at stand-by, the motor driver can stop the regulator at stand-by, due to incorporation of a sleep function. Consequently, power consumption of the IC is reduced.

The product not only drives stepping motors, it also provides interface for driving brushed DC motors. This provides various combinations of stepping motors and brushed DC motors; for example, one channel of stepping motor and two channels of brushed DC motors.

Originally published here.