New Stepping Motor Drive IC AN8495SB ■ Overview AN8495SB is a stepping-motor-driving IC, created by using a DMOS 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. Unit:mm 18.40±0.20 (5.15) (4.80) 28 22 21 15 +0.10 0.30-0.05 8.30±0.20 ■ Feature 10.93±0.30 (1.315) 0˚ to 10˚ 0.65±0.20 1 7 8 14 (6.40) (1.20) 0.35+0.10 -0.05 0.80 ● Built-in noise canceller. 0.10±0.10 ● 2-bit current level switching. 2.70±0.20 ● 4-phase input (W1-2 phase excitation ) 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 4.75V to 5.25V VCC Operating supply voltage range VM 18.0V to 28.0V ■ Electrical Characteristics (Ta=25℃±2℃, Vcc=5.0V, VM=24V） Parameter Condition Symbol min typ max unit Power block Output saturation voltage H VOH I = -1.0A Output saturation voltage L VOL I = 1.0A - 0.65 0.98 V Flywheel diode forward voltage VDI I = 1.0A 0.5 1.0 1.5 V 50.2 67 83.8 kHz VM-0.75 VM-0.5 - V Control block PWM frequency fPWM Comparator threshold H(100%) VTH IN0=IN1=0V, IN2=IN3=0V 0.479 0.503 0.528 V Comparator threshold C(67%) VTC IN0=5V,IN1=0V,IN2=5V,IN3=0V 0.305 0.330 0.356 V Comparator threshold L(33%) VTL IN0=0V,IN1=5V,IN2=0V,IN3=5V 0.151 0.167 0.185 V 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 M00489AE Tel. (075)951-8151 http://www. panasonic.co.jp/semicon/ New publication, effective from Dec. 6. 2001 ■ Block Diagram VCC ENABLEA 25 PHA1 IN0 1 7 IN1 4 3 23 FIN Senser Current IN3 5 6 24 ENABLEB PHB1 2 9 20 Senser Current OSC BLANK IN2 R R Q S S 19 CHARGE PUMP CIRCUIT Q ENA.off 8 17 26 16 Vref TSD Signal 15 GATE CIRCUIT GATE CIRCUIT Vref 14 FIN 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 (1KΩ or over). ■ Pin Descriptions Pin No. Symbol Function Pin No. 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 Symbol Function