TC78S600FNG/FTG CD Integrated Circuit Silicon Monolithic TC78S600FNG/FTG Stepping Motor Driver IC The TC78S600FNG/FTG is a PWM constant-current type stepping motor driver IC designed for sinusoidal-input micro-step control of stepping motors. The TC78S600FNG/FTG can be used in applications that require 1-2-phase, W1-2-phase, 2W1-2 phase, and 4W1-2 phase excitation modes. The TC78S600FNG/FTG is capable of forward and reverse driving of a 2-phase bipolar stepping motor using only a clock signal. Features Motor power supply voltage: VM = 15V (max) Control power supply voltage: Vcc = 2.7 to 5.5V (operation range) Output current: Iout 0.8A (max) P-WQFN24-0404-0.50-004 Output ON-resistance: Ron = 1.2 (upper and lower sum) Decoder that enables micro step control with the clock signal Weight: SSOP20-P-225-0.65A 0.09g(typ.) Selectable phase excitation modes (1-2, W1-2, 2W1-2, and P-WQFN24-0404-0.50-004 0.03g(typ.) 4W1-2) Internal pull-down resistors on inputs: 200 k (typ.) Output monitor pin ( ) MO Over current protection (ISD), Thermal shutdown (TSD) circuit, and Undervoltage lockout (UVLO) circuit. Package: SSOP20 and QFN24 Fast decay: always 12.5% Built-in cross conduction protection circuit This product has a MOS structure and is sensitive to electrostatic discharge. When handling this product, ensure that the environment is protected against electrostatic discharge by using an earth strap, a conductive mat and an ionizer. Ensure also that the ambient temperature and relative humidity are maintained at reasonable levels. Do not insert devices in the wrong orientation or incorrectly. Otherwise, it may cause the device breakdown, damage and/or deterioration. 1 2014-10-01 2014 TOSHIBA Corporation TC78S600FNG/FTG Block Diagram GND STBY Vcc MO POR AO1 Pre H-Bridge Drive A M1 AO2 PWM M2 Timer step RFA Decoder CW/CCW 1-2 phase CK W1-2 phase 2W1-2 phase 4W1-2 phase ISD RESET VM TSD ENABLE BO1 Pre H-Bridge Drive B BO2 Vref PWM Vref Timer TQ RFB OSC OSC 2 2014-10-01