TB9120AFTG Bi-CMOS Integrated Circuit Silicon Monolithic TB9120AFTG Bipolar stepping motor driver with a clock input interface for automotive applications 1 Overview TB9120AFTG is a two-phase bipolar stepping motor driver with a clock input interface and a PWM constant-current control system. It can be used for a small stepping motor in a wide range of automotive applications. P-VQFN28-0606-0.65-002 2 Applications Product weight : 0.10g(typ.) Small stepping motors for automotive applications such as an adjustment to an angle of a concave mirror in HUD, valves in motorcycles and valves/dampers for HVAC 3 Features A two-phase bipolar stepping motor can be driven with a single chip. Adoption of PWM constant-current control Built-in a mixed decay mode Excitation mode selectable: full, half, quarter, 1/8, 1/16, and 1/32 step On-resistance of power MOSFETs: Ron(H+L)=0.8(typ.) Input power supply voltage(VBAT): 40V(max) Maximum output driving current: Overcurrent detection value, 2.0A(typ.) Internal voltage 5V(VccOUT) Anomaly detection functions: Over temperature detection, overcurrent detection, load open detection and low voltage detection DIAG output: Over temperature detection, overcurrent detection and load open detection Stall detection function and flag output function if detected Standby function Operating power supply voltage range: VBAT(opr.)=7V to 18V. Only some of the functions are guaranteed in 4.5V to 7V. Maximum clock input frequency: fCLK(max) 100kHz Operating temperature: -40 to 125C Package: VQFN28(0.65) AEC-Q100 qualified Start of commercial production 2020-04 2020 1 2020-05-12 Toshiba Electronic Devices & Storage Corporation RRSBSB OUTB+ OUTB OOUTUTBB-- OUTA OUTA+ OOUUTATA-- RRSASA TB9120AFTG 4 Block diagram Standby BSTBY Control OSC-Clock Motor OSCM DMODE0 Converter Oscillator DMODE1 Step DMODE2 VccOUT System VccOUT Resolution Oscillator Regulator TORQUE0 Selector Signal VDD Decode TORQUE1 Logic VBAT VccOUT VBAT UVLO CW/CCW POR CLK START Current Current VREF Level Reference ENABLE Setting Setting MO Angle Monitor Motor Control Logic Pre- Pre- driver driver TSD DIAG Error ISD Output SDT Stall SD SD Error Detection Out put Load Open Detection Current Current GND Comp Comp Besides the above, there are TEST 1 and TEST 2 as the test pins for shipping inspection. Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory purposes. 2020 2 2020-05-12 Toshiba Electronic Devices & Storage Corporation