ver.2010/09/03 njw4305 pwm 3-phase dc brushless motor controller h1+ h2+ h3+ fr + - vcc uvlo saw oscillator + - osc verr pwm logic gnd ilimit wl vl ul wh vh uh lock detect ct tsd + - + - + - h1- h2- h3- dead tim e rotor position decode fg vref local oscillator package outline NJW4305XVC3/t block diaglam general description the njw4305 is a 3-phase brushless dc motor controller with pwm control. it uses hall element signal inputs and generates motor driving waveform. output pre-driver is optimized to work with external power mos transistors for better power handling. using the njw4305, 3-phase dc motor application with speed control feature can be easily achieved. feature ? supply voltage : 7.0v ~ 38v ? quiescent current : 4.1ma typ. ? pwm pre-driver : 100ma ? direct pwm control circuit ? operating temperature : -40oc ~ +105oc ( t series ? protection circuit : ilimit, uvlo, tsd, ld ? fg output ? forward / reverse direction ? package : ssop-20-c3 function lineup njw4305a : fr function njw4305b ( pln ) : vref for hb njw4305c ( pln ) : br function njw4305d ( pln ) : fr+vref+br+small pkg
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