Preliminary
Bi-CMOS Integrated Circuit TB9120FTG Silicon Monolithic TB9120FTG
Bipolar stepping motor driver with clock input interface for automotive applications 1. Overview
The TB9120FTG is a two-phase bipolar stepping motor driver with
a PWM constant-current control system and a clock input interface.
It can be used for a small stepping motor in a wide range of
automotive applications.
P-VQFN28-0606-0.65 2. Applications
A stepping motor drive for automotive applications such as an
adjustment to an angle of a concave mirror in HUD, motorcycle
valves and valves/dampers for HVAC 3. Features
-A two-phase bipolar stepping motor can be driven by using a single microchip.
-PWM constant-current control
-Mixed decay mode
-Selectable microstep: full, half, 1/4, 1/8, 1/16 and 1/32 step
-Low Ron (Upper side + Lower = 1.2О© (typ.) power MOSFETs
-Maximum Supply Voltage (Absolute maximum ratings): 40V
-Built in Thermal Shutdown (TSD), Overcrrent Shutdown (ISD),
Load Open Detection and Power on Reset (POR)
-Flag Output for Thermal Shutdown (TSD), Overcrrent Shutdown (ISD)
and Load Open Detection
-Built in Stall Detection and Frag Output
-BSTBY terminal for Standby Function …
