bm34063 a dc-dc converter 200 6 /0 1 / 2 5 1 features description z 3v to + 37 v input voltage operation z internal 1.6a peak curre nt switch z internal 1.8% reference z low quiescent current at 1.5ma z frequency from 100hz ~ 1 8 0k hz (100pf) z output v olt age adjustable z active current limiting z step-up, step-down or inverting switching regulators the bm34063 a series is a monolithic control circuit containing the primary functions required for dc-to-dc converters. these devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. pin assignment pin1: switch collector (swc) pin5: comparator inverting input (fb) pin2: switch emitter (swe) pin6: voltage supply (vcc) pin3: timing capacitor (tc) pin7: ipk sense (ipk) dip/sop-8 1 2 3 4 8 7 6 5 swc swe tc gnd drc ipk vcc fb pin4: ground (gnd) pin8: volt age driver collector (drc) ordering information part number package bm34063 ag p dip-8 bm34063 ag s sop-8 h means : pb device , BM34063Ah will be closed before july of 2006. g means : p b -free , BM34063Ag meets sgs testing standard. if one day , you feel not good to ap1513 / mp9141 on price due to cost pr oblem , you can choose BM34063A as +12v down to 3.3v/5.0v if less than 1a ouput . ??e???????e?t1??? ??:+86-755-88821663/83791833 ??:??e????????aa?????c5130 a???:??? 133 1654 7654 www.datasheet.co.kr datasheet pdf - http://www..net/
bm34063 a dc-dc converter 200 6 /0 1 / 2 5 2 absolute maximum ratings (ta=25 c, unles otherwise specified) parameter symbol value unit power supply voltage v cc 40 v comparator input voltage range v ir -0.3~+40 v switch collector voltage v c(sw) 40 v switch emitter voltage v swe 40 v switch emitter to collector voltage v ce 40 v driver collector voltage v c(dr) 40 v switch current i sw 1.5 a dip-8 1 power dissipation at ta=25 o c p d so-8 0.625 w operating ambient temperature range t opr 0~+70 o c storage temperature range t stg -65~+150 o c operating junction temperature t opj 120 o c thermal resistance junction-ambient ja 125 o c/w block diagram sc pin1: 1.6a switch collector tc pin3: oscilletor timing capacitor gnd pin4: power gnd dri pin8: driver collector ipk pin7: highside current sense input, vcc-vipk=300mv vcc pin6: power supply input fb pin5: feedback comparator inverting input se pin2: darlington switch emitter q1 q2 80 ? q s r ct ipk oscillator comparator 1.25v reference voltage + - www.datasheet.co.kr datasheet pdf - http://www..net/
bm34063 a dc-dc converter 200 6 /0 1 / 2 5 3 electrical characteristics (v cc =5v,ta=0~70 c, unless otherwise specified) parameter symbol test condition min. typ. max. unit oscillator charging current i chg v cc =5~40v, ta=25 o c 10 25 40 ua discharge current i dischg v cc =5~40v, ta=25 o c 140 190 240 ua frequency f osc v pin5 =0, c t =1nf, ta=25 o c 2 0 33 4 5 0 khz discharge to charge current ratio i dischg /i chg v pin7 =v cc , ta=25 o c 5.2 6 7.5 current limit sense voltage v ipk i dischg =i chg , ta=25 o c 250 300 350 mv output switch saturation voltage, darlington connection v ce(sat) 1 i sw =1a, v c(sw) =v c(dr) - 1 1.3 v saturation voltage v ce(sat) 2 i sw =1a, i c(dr) =50ma - 0.4 0.7 v dc current gain h fe i sw =1a, v ce =5v 35 120 - collector off-state current i cc(off) v ce =40v, ta=25 o c - 10 100 ua comparator threshold voltage v fb 1.23 1.25 1.27 v threshold voltage line regulation ? v fb v cc =5~40v - 1.5 6 mv input bias current i ib v in =0v - 40 400 na total device supply current i cc v cc =5~40v, v pin7 =v cc , v pin5 > v fb , c t =0.001uf, pin7=gnd, remaining pins open - 1.6 3 ma application information design formula table calculation step-down step-up voltage-inverting t on /t off (v out +v f )/(v in(min) -v sat -v out ) (v out +v f -v in(min) )/(v in(min) -v sat ) (|v out |+v f )/(v in(max) -v sat ) (t on +t off ) max 1/f min 1/f min 1/f min c t 4*10 -5 t on 4*10 -5 t on 4*10 -5 t on i c(sw) 2*i out(max) 2*i out(max) (t on +t off /t off ) 2*i out(max) (t on +t off /t off ) r s 0.3/i c(sw) 0.3/i c(sw) 0.3/i c(sw) l (min) (v in(min) -v sat /i pk(sw) )*t on(max) (v in(min) -v sat /i pk(sw) )*t on(max) (v in(min) -v sat /i pk(sw) )*t on(max) c o (i pk(sw) *(t on +t off ))/(8*v ripple(p-p) ) i out *t on /v ripple(p-p) i out *t on /v ripple(p-p) v sat : saturation voltage of the output switch. v f : forward voltage drop of the ringback rectifier. the following power supply char acteristics must be chosen: v in : nominal input voltage. v out : desired output voltage. |vout|=1.25*(1+rb/ra) i out : desired output current f min : minimum desired output switching frequency at the selected values for vin and iout. v ripple(p-p) : desired peak to peak output ripple voltage in practice, the calculated value will need to be increased due to the capacitor equivalent series resistance and board layout. the ripple voltage should be kept to a low value since it will directly effect the line and load regulation. www.datasheet.co.kr datasheet pdf - http://www..net/
bm34063 a dc-dc converter 200 6 /0 1 / 2 5 4 application information (continued) 1 8 2 3 4 5 6 7 1 8 2 3 4 5 6 7 v out 28v / 200ma r1 150 ? c out 220uf c t 680pf v in ra 2.2k ? rsc 0.22 c1 100uf bm34063 a l1 d1 200uh 1n5819 rb 47k ? line regulation: 100mv (vin=8v~16v, @io=200ma) load regulation: 5mv (vin=12v, @io=80ma~200ma) fig.2 step-up converter fig.4 step-down converter line regulation: 40mv (vin =10v~20v, @io=500ma) load regulation: 5mv (vin=15v, @io=10ma~500ma) short circuit current: 1.3a (vin=15v, @rl=0.1 ? bm34063 a v out 5v / 500ma rsc 0.25 l1 rb ra 1.2k ? 3.6k ? c t 470pf d1 1n5819 200uh c out 470uf c1 100uf v in 1 8 2 3 4 5 6 7 bm34063 a rsc c1 ra r1 rb c t d1 l1 q1 r2 v in v out c out fig.3 step-up converter with external npn switch www.datasheet.co.kr datasheet pdf - http://www..net/
bm34063 a dc-dc converter 200 6 /0 1 / 2 5 5 1 8 2 3 4 5 6 7 1 8 2 3 4 5 6 7 1 8 2 3 4 5 6 7 fig.5 step-down converter with external pnp saturation switch v out v in bm3406 3a r2 r1 q1 l1 d1 rsc c1 ra rb c out c t fig.6 voltage inverting converter v out -12v / 100ma c out 470uf l1 100uh 1n5819 c t 680pf bm34063 a rsc 0.25 c1 100uf rb 8.2k ? ra 953 ? v in 4.5v-6v line regulation: 20mv (vin=4.5v~6v, @io=100ma) load regulation: 100mv (vin=5v, @io=10ma~100ma) fig.7 voltage inverting converter with external pnp saturation switch v out c out d1 l1 r1 r2 bm34063 a c t rsc ra rb c1 v in q1 d1 www.datasheet.co.kr datasheet pdf - http://www..net/
bm34063 a dc-dc converter 200 6 /0 1 / 2 6 dip-8 (p) dimension sop-8 (s) dimension a b 8 7 65 4 32 1 h i f g j k m l 1 e d c 8-lead dip-8 plastic package dim min. max. a 6.29 6.40 b 9.22 9.32 c - *1.52 d - *1.27 e - *0.99 f 3.25 3.35 g 3.17 3.55 h 0.38 0.53 i 2.28 2.79 j 7.49 7.74 k - *3.00 l 8.56 8.81 m 0.229 0.381 1 94 o 97 o *: typical, unit: mm a b f c d e g part a i h j k o m l n part a 234 5 6 7 8 pin1 index dim min. max. a 4.85 5.10 b 3.85 3.95 c 5.80 6.20 d 1.22 1.32 e 0.37 0.47 f 3.74 3.88 g 1.45 1.65 h 4.80 5.10 i 0.05 0.20 j 0.30 0.70 k 0.19 0.25 l 0.37 0.52 m 0.23 0.28 n 0.08 0.13 o 0.00 0.15 *: typical, unit: mm 8-lead so-8 plastic surface mounted package www.datasheet.co.kr datasheet pdf - http://www..net/
bm34063 a dc-dc converter 200 6 /0 1 / 2 7 soldering methods 1. storage environment: temperature=10 o c~35 o c humidity=65%15% 2. reflow soldering of surface-mount devices profile feature sn-pb eutectic assembly pb-free assembly average ramp-up rate (t l to t p ) <3 o c/sec <3 o c/sec preheat - temperature min (ts min ) - temperature max (ts max ) - time (min to max) (ts) 100 o c 150 o c 60~120 sec 150 o c 200 o c 60~180 sec ts m a x t o t l - ramp-up rate <3 o c/sec <3 o c/sec time maintained above: - temperature (t l ) - time (t l ) 183 o c 60~150 sec 217 o c 60~150 sec peak temperature (t p ) 240 o c +0/-5 o c 260 o c +0/-5 o c time within 5 o c of actual peak temperature (t p ) 10~30 sec 20~40 sec ramp-down rate <6 o c/sec <6 o c/sec time 25 o c to peak temperature <6 minutes <8 minutes 3. flow (wave) soldering (solder dipping) products peak temperature dipping time pb devices. 245 o c 5 o c 5sec 1sec pb-free devices. 260 o c +0/-5 o c 5sec 1sec figure 1: temperature profile t p t l ramp-down ramp-up ts max ts min critical zone t l to t p t s preheat t l t p 25 t 25 o c to peak time temperature www.datasheet.co.kr datasheet pdf - http://www..net/
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