n ver 1.0 - 1 - pwm type 3 - phase dc brushless motor contorol ic general description package outline features operating voltage ( v + =8v to 18v) pre - driver circuit (iout=+50ma/ - 150ma max.) current limit sense voltage (current limit=0.5v 10%) internal os cillator ( frequency control for external capacitor) forward or reverse direction fg signal output (output frequency to hall frequency) internal soft start (external capacitor to verr pin. internal on/off circuit (no - output is verr pin to gnd.) bipolar technology package outline dip20, dmp20 pin configration the njm2625a is a 3 - phase dc brus h - less motor control ic with pwm control. it incorporates hall amplifiers, pwm control circuits, totem - pole pre drivers for external power mos transistors, current limit and frequency generator circuit. the njm2625 a easily implements speed control an d rotation direction control for dc motor application. njm2625 a d njm262 5 a m njm 2 625 a d njm2625 a m 1.fg 2.vref 3.h1+ 4.h1 - 5.h2+ 6.h2 - 7.h3+ 8.h3 - 9.verr 10.osc 11.gnd 12.i limit 13.wl 14.vl 15.ul 16.wh 17.vh 18.uh 19.v + 20.f/r pin function 1 4 3 2 5 8 7 6 9 10 11 12 13 14 15 16 17 18 19 20
- 2 - block diagram v + rotor position decode r v + 2.vref 10.osc 9.verr 1.fg 11.gnd 20.f/r 16.wh 17.vh 18.uh 13.wl 14.vl 15.ul 12.ilimit 3.h1+ 4.h1 - 5.h2+ 6.h2 - 7.h3+ 8.h3 - 19.v + uvlo vref logic saw oscillator fg pwm comp
- 3 - absolute maximum ratings (ta=25 c) parameter symbol ratings unit maximum supply voltage v + 20 v power dissipation p d (dip20) 700 (dmp2 0) 350 mw operating temperature range topr - 40 ~ + 85 c storage temperature range tstg - 50 ~ + 15 0 c electrical characteristics (v + = 12 v, ct=1000pf, cref=1 f, ta=25 c ) total device parameter symbol test conditions min. typ. max. unit supply voltage v + 8.0 - 18.0 v under voltage sense voltage (under voltage lock out) uvlo output enable v + de creasing 7.00 7.25 7.50 v hysteresis voltage (under voltage lock out) d uvlo 0.4 0.5 0.6 v supply current icc rl= pwm duty=50% - 15.0 22.0 ma hall sensor section parameter symbol test conditions min. typ. max. unit hysteresis voltage vhys rl=470 w - 30 - mv input common mode voltage range vicm rl=470 w 1.5 - 10.5 v input bias current ib - - 600 na output section parameter symbol test conditions min. typ. max. unit output voltage 1 voh isource=50ma 10 10.3 - v output voltage 2 vol isink=150ma - 1.5 2.0 v over current sense section parameter symbol test conditi ons min. typ. max. unit sense voltage vth 0.45 0.50 0.55 v input voltage range vip - - 3.0 v input bias current iib - - 0.9 - 5.0 a oscillator section parameter symbol test conditions min. typ. max. unit oscillation frequency fosc 20 25 30 khz os cillate fluctuations (line regulation ) ? fosc/ ? v v + =8v to 18v - 0.01 5.00 % pwm0% sense voltage pwm0 pwm duty=0% - - 0.35 v pwm100% sense voltage pwm1 pwm duty=100% 5.40 - - v saw wave peak voltage vpfosc 4.75 5.00 5.25 v saw wave bottom voltage vbfosc 0.50 0.65 0.80 v
- 4 - electrical characteristics (v + = 12 v, ct=1000pf, cref=1 f, ta=25 c ) fg output section parameter symbol test conditions min. typ. max. unit saturation voltage fgv - 0.3 0.5 v pull - up resistance fgr 8 10 12 k w error amplifier secti on parameter symbol test conditions min. typ. max. unit input offset voltage vio - 7 - mv input offset current iio - 8.0 - na input bias current iibrr - - 46 - na input common mode voltage range vicmrr 0 - vref v reference voltage section paramete r symbol test conditions min. typ. max. unit output voltage vref iref=1.0ma 6.00 6.40 6.80 v line regulation ? vrefli v + =8v to 18v - 1.5 25 mv road regulation ? vreflo iref=1.0ma to 20.0ma - 150 250 mv forward or reverse direction section parameter symbol test conditions min. typ. max. unit forward direction vf rl=470 w v + - 2 - v + v reverse direction vr rl=470 w - - 2 v hysteresis voltage ? vfr rl=470 w - 0.5 - v (note) output switch tests are performed under pulsed conditions to minimize power dissipation. f g output input h1 h2 h3 fg output 1 h l h h 2 h l l l 3 h h l h 4 l h l l 5 l h h h 6 l l h l f/r input pin this pin dose not include neither pull up resistance nor pull down resistance. terminal voltage direction l input f h input r
- 5 - typical application 2.vref 10.osc 9.verr 1.fg 11.gnd 20.f/r 16.wh 17.vh 18.uh 13.wl 14.vl 15.ul 12.ilimit 3.h1+ 4.h1 - 5.h2+ 6.h2 - 7.h3+ 8.h3 - 19.v + v + rotor position decode r v + uvlo vref logic saw oscillator fg pwm comp h1 h2 h3 n n s s motor vm a rotation direction change must be made after moto r stopped completely. when pwm duty is extremely small, two or more switching elements cannot be driven entirely. in such case, switching elements will generate excess heat and it may cause destruction of the switching devices. therefore, extensive heat evaluation is necessary for switching device selection particularly in consideration of the area of safety operation (aso).
- 6 - typical characteristics reference voltage vs. reference voltage output current (v + =12v,ta=25 ) 0 1 2 3 4 5 6 7 0 10 20 30 40 50 60 reference voltage output current iref (ma) reference voltage vref (v) oscillate frequency vs. supply voltage (ct=1000pf,ta=25 ) 25 25.5 26 26.5 27 27.5 28 5 10 15 20 supply voltage v + (v) oscillate frequency fosc (khz) reference voltage vs. supply voltage (ta=25 ) 0 2 4 6 8 0 4 8 12 16 20 supply voltage v + (v) reference voltage vref (v) supply current vs. supply voltage (ct=1000pf,verr=3v,rl= ,ta=25 ) 0 4 8 12 16 0 5 10 15 20 supply voltage v + (v) supply current i cc (ma) output1 vs. output current (v + =12v,ct=1000pf,verr=5.2v,ta=25 ) 6 7 8 9 10 11 12 0 100 200 300 400 500 output current isource (ma) output1 voltage voh (v) wl uh output voltage 2 vs. output current (v + =12v,ct=1000pf,verr=5.2v,ta=25 ) 0 1 2 3 4 0 100 200 300 400 output current isource (ma) output voltage 2 vol (v) wl uh c c c c c c
- 7 - typical characteristics fg saturation voltage vs. output current (v + =12v,ta=25 ) 0 1 2 3 4 5 0 1 2 3 4 5 6 output current fgi (ma) saturation voltage fgv (v) reference voltage vs. temperature (v + =12v,iref=1ma) 6 6.2 6.4 6.6 6.8 -50 -25 0 25 50 75 100 125 150 temperature ta ( ) reference voltage vref (v) sense voltage vs. temperature (v + =12v) 0.48 0.49 0.5 0.51 0.52 0.53 0.54 -50 -25 0 25 50 75 100 125 150 temperature ta ( ) sense voltage vth (v) oscillation frequency vs. temperature (v + =12v,ct=1000pf) 15 20 25 30 35 -50 -25 0 25 50 75 100 125 150 temperature ta ( ) oscillation frequency fosc (khz) oscillation frequency vs. timing capacitor (v + =12v,ta=25 ) 0.1 1 10 100 100 1000 10000 100000 timing capacitor c t (pf) oscillation frequency f osc (khz) supply current vs. temperature (v + =12v,ct=1000pf,verr=3v,rl= ) 8 9 10 11 12 -50 -25 0 25 50 75 100 125 150 temperature ta ( ) supply current icc (ma) c c c c c c
- 8 - memo the specifications on this data book are only given for information, without any guarantee as regards either mistakes or omissions. the application circuit in this data book are described only to show re presentative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
|
