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| 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. 18.400.20 (5.15) (4.80) 28 22 21 15 (1.315) Unit:mm Feature (1.20) 0.80 10.930.30 8.300.20 0.30-0.05 +0.10 0 to 10 0.650.20 0.35+0.10 -0.05 2-bit current level switching. Built-in noise canceller. Built-in phase-change thru-current protection function. Built-in flywheel diode SEATING PLANE 0.100.10 2.700.20 4-phase input (W1-2 phase excitation ) 1 7 (6.40) 8 14 SEATING PLANE HSOP042-P-0400 Applications Printer , FAX ,PPC Recommended Operating Range Operating supply voltage range VCC 4.75V to 5.25V 18.0V to 28.0V VM Electrical Characteristics (Ta=252, Vcc=5.0V, VM=24V Parameter Power block Output saturation voltage H Output saturation voltage L Flywheel diode forward voltage Control block PWM frequency Comparator threshold H(100%) Comparator threshold C(67%) Comparator threshold L(33%) fPWM VTH VTC VTL IN0=IN1=0V, IN2=IN3=0V IN0=5V,IN1=0V,IN2=5V,IN3=0V IN0=0V,IN1=5V,IN2=0V,IN3=5V Symbol Condition min typ max unit VOH VOL VDI I = -1.0A I = 1.0A I = 1.0A VM-0.75 VM-0.5 0.5 0.65 1.0 0.98 1.5 V V V 50.2 0.479 0.305 0.151 67 0.503 0.330 0.167 83.8 0.528 0.356 0.185 kHz V V 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 PHA1 IN0 IN1 IN2 IN3 ENABLEB PHB1 25 7 1 3 4 Senser Current 23 FIN 24 OSC Senser Current 5 6 9 2 20 19 BLANK R QS R S Q CHARGE PUMP CIRCUIT ENA.off Vref TSD Signal Vref GATE CIRCUIT 8 17 16 Rs 26 15 FIN 14 13 Rs 12 22 GATE CIRCUIT 21 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. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Symbol PHA1 PHB1 IN0 IN1 IN2 IN3 ENABLEA VM1 ENABLEB N.C N.C BOUT2 RCSB BOUT1 AOUT2 Function A phase changeover terminal B phase changeover terminal A phase output torque control 1 A phase output torque control 2 B phase output torque control 1 B phase output torque control 2 A phase start/stop signal input Supply terminal for Motor 1 B phase start/stop signal input Motor drive B phase output 2 B phase current detector Motor drive B phase output 1 Motor drive A phase output 2 Pin No. 16 17 18 19 20 21 22 23 24 25 26 27 28 FIN Symbol RCSA AOUT1 N.C BC1 BC2 VPUMP VM2 VREFA VREFB VCC GND N.C N.C GND Function A phase current detector Motor drive A phase output 1 Capacitor for charge pump circuit 1 Capacitor for charge pump circuit 2 Charge pump circuit output Supply terminal for Motor 2 A phase torque ref. voltage input B phase torque ref. voltage input Supply terminal Signal GND Signal GND |
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