New Stepping Motor Drive IC AN8495SB Overview AN8495SB is a stepping-motor-driving IC, created by using a D- Unit:mm MOS process, and provides a maximum output of 30V at 1.5A. By the PWM drive and 2-bit constant-current-chopping-drive method, the winding 1-2 phase drive is possible. 18.400.20 (5.15) (4.80) 28 22 21 15 (1.315) Feature 0 to 10 0.650.20 1 7 814 (6.40) 4-phase input (W1-2 phase excitation ) +0.10 0.80 0.35 (1.20) -0.05 2-bit current level switching. Built-in noise canceller. SEATING PLANE SEATING PLANE Built-in phase-change thru-current protection function. Built-in flywheel diode HSOP042-P-0400 Applications Printer , FAX ,PPC Recommended Operating Range VCC 4.75V to 5.25V Operating supply voltage range VM 18.0V to 28.0V Electrical Characteristics (Ta=252, Vcc=5.0V, VM=24V Parameter Symbol Condition min typ max unit Power block Output saturation voltage H VOH I = -1.0A VM-0.75 VM-0.5 V - Output saturation voltage L I = 1.0A - V VOL 0.65 0.98 Flywheel diode forward voltage I = 1.0A VDI V 0.5 1.0 1.5 Control block PWM frequency kHz fPWM 67 50.2 83.8 Comparator threshold H(100%) IN0=IN1=0V, IN2=IN3=0V VTH 0.479 V 0.503 0.528 Comparator threshold C(67%) IN0=5V,IN1=0V,IN2=5V,IN3=0V V VTC 0.305 0.330 0.356 Comparator threshold L(33%) IN0=0V,IN1=5V,IN2=0V,IN3=5V V VTL 0.151 0.167 0.185 The products and specification are subject to change without any notice. Please ask for the latest Product Standards to guarantee the satisfaction of your product requirements. 1 Kotari-yakemachi, Nagaokakyo, Kyoto 617-8520, Japan Tel. (075)951-8151 Block Diagram V CC PHA1 IN0 IN1 IN2 IN3 PHB1 ENABLEA ENABLEB FIN 25 7 1 3 4 23 5 6 9 2 20 19 24 Senser Senser OSC BLANK Current Current CHARGE PUMP R R CIRCUIT Q S S Q ENA.off Vref Vref TSD Signal FIN 8 17 16 26 15 14 13 12 22 21 Rs Rs VM * A voltage is applied externally to Terminals PHA1, PHB1, IN0 to 3, ENABLEA, ENABLEB, VREFA and VREFV, and may cause an overcurrent. To protect the device from overcurrent, insert an overcurrent protective resistor (1K or over). Pin Descriptions Pin No. Symbol Function Pin No. Symbol Function 1 PHA1 A phase changeover terminal 16 RCSA A phase current detector 2 PHB1 B phase changeover terminal 17 AOUT1 Motor drive A phase output 1 3 IN0 A phase output torque control 1 18 N.C - 4 IN1 A phase output torque control 2 19 BC1 Capacitor for charge pump circuit 1 5 IN2 B phase output torque control 1 20 BC2 Capacitor for charge pump circuit 2 6 IN3 B phase output torque control 2 21 VPUMP Charge pump circuit output 7 ENABLEA A phase start/stop signal input 22 VM2 Supply terminal for Motor 2 8 VM1 Supply terminal for Motor 1 23 VREFA A phase torque ref. voltage input 9 ENABLEB B phase start/stop signal input 24 VREFB B phase torque ref. voltage input 10 N.C - 25 VCC Supply terminal 11 N.C - 26 GND Signal GND 12 BOUT2 Motor drive B phase output 2 27 N.C - 13 RCSB B phase current detector 28 N.C - 14 BOUT1 Motor drive B phase output 1 FIN GND Signal GND 15 AOUT2 Motor drive A phase output 2 GATE CIRCUIT GATE CIRCUIT