pj34063 dc-to-dc converter controller 1-8 2004/10 rev.b he pj34063 series is a monlthic control circuit containing the primary functions required for dc to dc onverters. these devices consist of an internal duty cycle oscillator with an active current limit circuit, drive and a high current output switch. this series was specifically designed to be incorporated in step-up, step-down and voltage-inverting applications with a minimum number of external components. temperature compensated reference, comparator, controlled. ? operation from 3 to 40v input ? low standby current ? current limiting ? output switch current to 1.5a ? precision 2% reference ? output - voltage adjustable ? frequency of operation from 100hz to 100khz dip-8 sop-8 pin : 1. switch collector pin : 3. timing capacitor pin : 5. comparator inverting input pin : 7. ipk sense 2. switch emitter 4. gnd 6. vcc 8. driver collector device operating temperature (ambient) package pj34063cd dip-8 PJ34063CS -20 ? +85 sop-8 t block diagram ordering information features
pj34063 dc-to-dc converter controller 2-8 2004/10 rev.b characteristic symbol value unit power supply voltage v cc 40 vdc comparator input voltage range v ir -0.3 ~ +40 vdc switch collector voltage v c(sw) 40 vdc switch emitter voltage v e(sw) 40 vdc switch collector to emitter voltage v ce(sw) 40 vdc driver collector voltage v c(drive) 40 vdc drive collector current (note 1) i c(drive) 100 ma switch current isw 1.5 a operating junction temperature t j 0 to +125 operating ambient temperature range t a -20 to +85 storage temperature range tstg -25 to +150 (v cc = 5.0v. ta= tlow to thigh. unless otherwise specified) characteristic symbol test condition min typ max unit oscillator frequency fosc v pin5 =0v, c t =1.0nf , t a =25 24 33 42 khz charging current i chg v cc =5 to 40v, t a =25 24 35 42 a discharge current i dischg v cc =5 to 40v, t a =25 140 220 260 a discharge to charge current ratio i dischg/ i chg pin7 to v cc , t a =25 5.2 6.5 7.5 -- current limit sense voltage v ipk(sense) i chg = i dischg, t a =25 250 300 350 mv output switch(note 2) saturation voltage , darlington connection v ce(sat) isw=1.0a, pins1,8 connected -- 1.0 1.3 v saturation voltage , darlington connection v ce(sat) isw=1.0a, r pin8 =82 to vcc, forced ? 20 -- 0.45 0.7 v dc current gain h fe isw=1.0a, v ce = 5.0v, t a =25 50 75 -- -- collector off- state current i c(off) v ce =40v -- 40 100 a comparator threshold voltage v th t a =25 1.23 1.25 1.27 v threshold voltage line regulation regline v cc = 3 to 40v -- 1.4 5.0 mv input bias current i ib v in =0v -- -20 -400 na total device supply current i cc v cc =5 to 40v, c t =1.0nf, pin7=vcc ,v pin 5>vth pin 2 =gnd, rema ining pins open -- -- 4.0 ma notes : 1.maximum package power dissipation limits must be observed. 2.low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. electrical characteristics absolute maximum ratings
pj34063 dc-to-dc converter controller 3-8 2004/10 rev.b figure 1.output switch on-off time versus oscillator timing capacitor figure 2.timing capacitor waveform figure 3.emitter follower configuration output saturation voltage versus emitter current figure 4.common emitter configuration output switch saturation voltage versus collector current figure 5.current limit sense voltage versus temperature figure 6.standby su pply current versus supply voltage
pj34063 dc-to-dc converter controller 4-8 2004/10 rev.b figure 1.step-up converter figure 2.external current b oost connections for ic peak greater than 1.5a 2a.external npn switch 2b.external npn saturated switch note : r 0 for constant vin
pj34063 dc-to-dc converter controller 5-8 2004/10 rev.b figure 3.step-down converter figure 4.external current b oost connections for ic peak greater than 1.5a 4a.external npn switch 4b.external npn switch
pj34063 dc-to-dc converter controller 6-8 2004/10 rev.b figure 5.voltage inverting converter figure 6.external current b oost connections for ic peak greater than 1.5a 6a.external npn switch 6b.external npn saturated switch
pj34063 dc-to-dc converter controller 7-8 2004/10 rev.b t able : d esign f ormula calculation step-up step-down voltage-inverting toff ton vsat (min) v (min) v v v cc in f out ? ? + out cc f out v vsat v v v ? ? + vsat v v v cc f out + + (ton+toff) max min 1 f min 1 f min 1 f c t 4.010 -5 ton 4.010 -5 ton 4.010 -5 ton i pk (switch) 2iout(max) ? ? ? ? ? ? ? ? + 1 toff ton 2iout(max) 2iout(max) ? ? ? ? ? ? ? ? + 1 toff ton rsc 0.3/i pk (switch) 0.3/i pk (switch) 0.3/i pk (switch) l (min) (max) ) ( (min) ton switch ipk vsat vin ? ? ? ? ? ? ? ? ? (max) ) ( (min) ton switch ipk vout vsat vin ? ? ? ? ? ? ? ? ? ? (max) ) ( (min) ton switch ipk vsat vin ? ? ? ? ? ? ? ? ? co ? ? ? ? ? ? ? ? ) ( pp vripple ioutton ? ? ? ? ? ? ? ? + ) ( 8 ) )( ( pp vripple toff ton switch ipk ? ? ? ? ? ? ? ? ) ( pp vripple ioutton terms and definitions ? vsat = saturation voltage of the output switch. ? v f = forward voltage drop of the rectifier. the following power supply characteristics must be chosen: ? v in = normal input voltage ? vout: desied output voltage, | vout | =1.25 ? ? ? ? ? ? + 1 2 1 r r ? iout : desired output current. ? fmin : minimum desired out put switching frequency at th e selected values for v in and.io. ? vripple(p-p): desired peak-to-p eak output ripple voltage. in practice, the calcula ted capaitor value will n eed to be increased due to its equivalent seri es resistance and board layout. the ripple voltage should be kept to a low value since it will directly aff ect the line and load regulation.
pj34063 dc-to-dc converter controller 8-8 2004/10 rev.b dip-8 mechanical drawing 1.top view 2.side view d e c a 1 8 4 5 b h g f g h 0.007 0.20 - 0.30 10 - 0.012 10 dim f d e c a b min 0.143 0.348 0.248 0.017 0.305 dip-8 dimension 2.54bsc 0.45 7.75 3.65 8.85 6.30 0.55 8.00 3.95 9.05 6.40 millimeters min max 0.10bsc 0.315 0.022 0.156 0.356 0.252 inches max sop-8 mechanical drawing 1.top view 2.side view e f d a 1 8 b c 4 5 h g 0.197 0.189 4.80 5.00 a 0.19 0.25 g h 0.40 0 1.27 8 1.27bsc 1.40 d e f 0.33 b c 3.80 5.80 1.50 0.51 4.00 6.20 0.007 0.010 0.050 0.016 0 8 0.157 0.059 0.020 0.244 0.055 0.05bsc 0.013 0.150 0.228 sop-8 dimension millimeters dim min max max inches min
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