Two stepping motor drivers can drive up to four brushed DC

motors. Incorporating two pairs of H-bridge drivers, the

TC78S121FTG can drive two DC motors or a single stepping

motor.

Features

● Single-chip motor driver for bipolar stepping motor

control

● Monolithic IC structured by CD process.

● Low ON-resistance: Ron = 0.6 Ω

In large mode, ON-resistance of combined H-bridges is (Ron) is 0.3 Ω

● Over-current detection (ISD), thermal shutdown (TSD) and VM power-on reset circuits

● Since the IC incorporates the VCC regulator for internal circuit operation, an external power supply (5 V)

is not required.

● Package: QFN48-P-0707-0.50

● Maximum output withstand voltage: 40 V (max)

● Output current: 2.0 A (max) in DC Motor (S) mode; 1.5 A (max) in Stepping Motor (S) mode

● Chopping frequency can be set by external capacitor and resistor. High-speed chopping is possible at

100 kHz or higher