AN44180A

AN44180A 37V / 1.5A Stepping Motor Driver FEATURES ・4-phase input control ・Built-in standby function → 2-phase, half step, 1-2 phase, W1-2 phase excitation enabled → The operation of standby function can lower current ・PWM can be driven by built-in CR (3-value can be selected during consumption of this LSI. PWM OFF period.) ・Built-in 3.3 V power supply (accuracy : ±3%) → The selection of PWM OFF period enables the best PWM drive. ・Built-in EMI reduction function ・Mix Decay control (4-value can be selected for Fast Decay ratio) ・Built-in malfunction prevention function when it don’t input → Mix Decay control can improve accuracy of motor current waveform. ・Built-in over-current protection (OCP) → If the current flows to motor output more than the setup value due to ground-fault etc., the OCP operates and all motor outputs supply voltage → it prevents from malfunction and destruction when it input voltage to IF (ENABLEA/ENABLEB, IN0～3, PHA, PHB...