ver.2010/09/03 NJW4372 pulse input step per motor driver general description the NJW4372 is a bipolar driv e stepper motor driver ic characterized as highly efficient. the control method used is a simple pulse train input control (step & dir) method of programming. th e drive stage consists of dmos h bridges. therefore, motor drive applicatio n circuit is composed of highly effective and low heating value. supply / interface voltage corresponds to the logic, 3.3v / 5.0v. NJW4372 has pwm current control circuits, torque set, enable and pd functions. the functions are easy and conv enient to operat e and suitable for a wide range of applications. feature ? supply voltage : 2.7v ~ 5.5v ? motor supply voltage : 10v ~ 38v ? output current : 500ma / ch ? on resistance output : r o = 1.65 ? ( typ. ) ? quiescent current : i dd = 300 a ( typ. ) ? pulse input ( step & dir ) control ? ttl compatible input ? enable / pd( power down and reset ) function ? pwm constant current control circuit ? torque control function ( tor ) ? protection circuit : uvlo, thd ? package : sdip-22 / ssop32 package outline NJW4372l NJW4372v block diaglam protection uvlo_vdd uvlo_vmm tsd gn d di r ste p hs m translator gate drive output control logic por m o out1a out1b alarm out2a out2b sense2 v r tor1 tor2 current level control (100, 70, 40, 20%) h-bridge (pch-nch) pwm logic pwm logic osc vmm sense1 gate drive h-bridge (pch-nch) vdd ena bl e vmm vmm vmm vmm vmm rese t bias brak e
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