Two stepping motor drivers can drive up to four brushed DC
motors. Incorporating two pairs of H-bridge drivers, the
TC78S121FNG 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 (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: HTSSOP48-P-300-0.50 0.5 mm pitch
● 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.