the products and specification are subject to change without any notice. please ask for the latest product standards to guarante e the satisfaction of your product requirements. overview feature applications new 1 kotari-yakemachi, nagaokakyo, kyoto 617-8520, japan tel. (075)951-8151 http://www. panasonic.co.jp/semicon/ new publication, effective from dec. 6. 2001 m00489ae stepping motor drive ic an8495sb an8495sb is a stepping-motor-driving ic, created by using a d- 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. 4-phase input (w1-2 phase excitation ) 2-bit current level switching. built-in noise canceller. built-in phase-change thru-current protection function . built-in flywheel diode printer , fax ,ppc 0.30 +0.10 - 0.05 21 15 22 28 814 7 1 0.65 0.20 (1.315) 10.93 0.30 8.30 0.20 18.40 0.20 (4.80) (5.15) seating plane 0.10 0.10 2.70 0.20 seating plane (6.40) (1.20) 0.35 +0.10 - 0.05 0 ? to 10 ? 0.80 unit:mm hsop042-p-0400 recommended operating range operating supply voltage range vm vcc 4.75v to 5.25v 18.0v to 28.0v electrical characteristics (ta=25 2 , vcc=5.0v, v m =24v parameter voh symbol condition min typ max unit 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%) vol vdi fpwm vth vtc vtl i = -1.0a i = 1.0a i = 1.0a in0=in1=0v, in2=in3=0v in0=5v,in1=0v,in2=5v,in3=0v in0=0v,in1=5v,in2=0v,in3=5v vm-0.75 vm-0.5 0.98 0.65 0.5 - 1.0 1.5 50.2 0.479 0.305 0.151 0.503 0.330 0.167 67 0.528 0.356 0.185 83.8 v - v v v v v khz
block diagram 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 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 symbol pha1 phb1 in0 in1 in2 in3 enablea vm1 enableb n.c n.c bout2 rcsb bout1 aout2 symbol rcsa aout1 n.c bc1 bc2 vpump vm2 vrefa vrefb vcc gnd n.c n.c gnd pin no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 pin no. 16 17 18 19 20 21 22 23 24 25 26 27 28 fin pin descriptions 15 14 13 25 r s q tsd signal fin 7 23 3 4 1 senser current vref ena.off vref 24 5 6 9 2 fin 21 gate circuit gate circuit osc blank senser current r s q charge pump circuit 17 12 8 22 20 19 enablea pha1 in0 in1 in2 in3 enableb phb1 rs 16 26 rs vm v cc * a voltage is applied externally to terminals pha1, phb1, in0 to 3, enablea, enableb, vrefa and vrefv, and may cause an overcu rrent. to protect the device from overcurrent, insert an overcurrent protective resistor (1k ? or over).
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