unisonic technologies co., ltd MC34063A linear integrat e d circuit www.unisonic.com.tw 1 of 9 copyright ? 2013 unisonic technologies co., ltd qw-r103-008. j dc to dc co nverter controller ? descr i pti o n t he ut c mc 340 63 a i s a monol ithic r e g u lator s ubs yst e m, inten ded f o r us e as d c to d c conv erter. t h is d e vice c ont ains a temperatur e c o mpe n sated b and ga p refer ence, a dut y- c y cl e control osci llat o r, driver and high curr ent ou tput s w itch. it can be used for step do w n , step-u p or in vertin g s w itching re gul ators as w e ll as for series pass regulat o rs. ? features * operati on fro m 3.0v to 40v. * short circuit c u rrent limiti ng. * lo w sta ndb y current. * output s w itch current of 1.5a w i th out e x ter nal trans istors. * f r equ enc y of oper ation from 100hz to 1 00k hz. * step-u p , step-do w n or invert ing s w itch re gu lators. ? or de r i ng i n form at i o n ordering n u m ber package packing lea d f r ee halogen free mc340 63a l-d 08-t mc340 63ag- d08-t dip-8 tube mc340 63a l-s 08-r mc340 63ag-s 08-r sop-8 tape reel mc340 63a l-s 08-t mc340 63ag-s 08-t sop-8 tube http://
MC34063A linear integrat e d circuit unisonic technologi es co., ltd 2 of 9 w w w . uniso nic.co m.t w qw-r103-008.j ? pin configuration switch c o ll ector switch emitter timing capacitor gnd dri v er co l l e c to r i pea k sense v cc comparator inverting input 1 2 3 4 8 7 5 6 ? p i n de sc ri pt i o n pin no pin name i/o descript ion 1 switch collector i internal darlington pairs ti collector 2 switch emitter o internal darlington pairs ti emitter 3 t i ming capacit or t he value of selecte d capac it or controls the intern al oscil l at or run rate 4 gnd 5 compar ator in verting input i inverting i n p u t of comparat or w h ich c an set & initiate th e d a rlin gton p a irs output s w itch 6 v cc 7 i peak sense i current sens e input to monitor t he voltag e drop across an extern al resistor plac ed in series w i t h v cc 8 driver collector i internal darlington pairs ti collector ? block di agra m 8 7 5 4 2 1 3 6 q s r c e t1 t2 a is d b ct vcc gnd timing ca pa citor s witch emitter sw it ch co l l e cto r 1.25v re f comp. os cill ator c o mpa r ator in vertin g input i pe ak sense dri v e col l ector
MC34063A linear integrat e d circuit unisonic technologi es co., ltd 3 of 9 w w w . uniso nic.co m.t w qw-r103-008.j ? absolute maxi mu m ra ting s (t a = 25c, unles s other w i s e sp ecified. ) parameter symbol ratings unit supply voltage v cc 40 v comparator input voltage v in ( comp ) -0.3 ~ +40 v switch collector voltage v c ( sw ) 40 v switch emitter voltage v e ( sw ) 40 v switch collector to emitter voltage v ce ( sw ) 40 v driver collector voltage v c ( dr ) 40 v switch current i sw 1.5 a po w e r diss i pat ion (t a =2 5 ? c) dip-8 p d 1 2 50 mw sop-8 625 junction temperature t j +150 c operating temperature t opr 0 ~ +70 c storage temperature t stg -65 ~ +150 c note: absol u te maxim u m rati ngs are thos e values be yo nd w h ich th e devi c e w h ich th e d e vice co uld b e perman entl y dama ged. abs o lute ma ximum ratings are str e ss ratings o n l y an d functio n a l device oper ati on is not imp lie d. ? th er mal dat a parameter symbol ratings unit junctio n -to-am bient dip-8 ja 100 c/w sop-8 160 ? electric al ch ara cteri s tic s ! (v cc =5.0v, t a = 0 ~ + 70c, u n less oth e r w is e specifi ed.) paramet er symbol t es t conditions min t y p max unit oscillator charg i n g curr ent i chg v cc =5 to 40v, t a = 25c 22 31 42 a dischar gin g c u rrent i dis chg v cc =5 to 40v, t a = 25c 140 190 260 a oscillator ampl itude v osc t a = 25c 0.5 v dischar ge to c harg e curre nt ratio k v 7 =v cc , t a = 25c 5.2 6.1 7.5 current lim it sense vo ltage v sen se i chg =i dis chg , t a = 25c 250 300 350 mv output switch saturatio n volt age 1 (n ote) v ce ( sat ) 1 i sw =1.0a, v c ( driver ) =v c ( sw ) 0.95 1.3 v saturatio n volt age 2 (n ote) v ce ( sat ) 2 i sw =1.0a, v c ( driver ) = 50ma 0.45 0.7 v dc curre nt gain (note) g i ( dc ) i sw =1 .0a, v ce = 5 .0v, t a = 25c 50 180 collector off state current (note) i c ( off ) v ce = 40.0v, t a = 25c 0.01 100 a comparator t h reshold volt age v th d 1.21 1.25 1.29 v t h reshold volt age l i ne r e g u l a tion v th d v cc = 3 ~ 40v 2.0 5.0 m v input bias curr ent i i ( bias ) v in = 0 v 50 400 na total device supp l y curre nt i cc v cc =5 ~4 0 v , c t = 0 .001 v 7 =v cc , v c >v thd , pin2=gnd 2.7 4.0 m a n puf : output switch tests are performed under puls ed conditions to minimize power dissipation.
MC34063A linear integrat e d circuit unisonic technologi es co., ltd 4 of 9 w w w . uniso nic.co m.t w qw-r103-008.j ? s tep - u p converter 170 h 1n5819 18 0 8 l 1 2 3 4 c t 7 6 5 r sc 0.2 2 v in 12v 1 500 pf 1.25 v r ef r eg q1 q2 c t o sc i pk v cc co mp . 10 0 + + - sq r r 2 47 k 2.2k r 1 330 c o + v out 28v /1 75ma 100 + v out 1.0 h op ti on al f ilter t e s t condit i ons result s line regulation v in = 8.0v ~ 16v, i out = 175ma 30mv = 0.05% load regulation v in = 12v, i out = 75ma ~ 175ma 10mv = 0.017% output ripple v in = 12v, i out = 175ma 400mv p-p efficienc y v in = 12v, i out = 175ma 87.7% output ripple with optional filter v in = 12v, i out = 175ma 40mv p-p
MC34063A linear integrat e d circuit unisonic technologi es co., ltd 5 of 9 w w w . uniso nic.co m.t w qw-r103-008.j ? s tep -down convert e r(cont.) t e s t condit i ons result s line regulation v in = 15v ~ 25v, i out = 500ma 12mv = 0.12% load regulation v in = 25v, i out = 50ma ~ 500ma 3.0mv = 0.03% output ripple v in = 25v, i out = 500ma 120mv p-p short circuit current v in = 25v, r l = 0.1 ? 1.1a efficiency v in = 25v, i out = 500ma 83.7% output ripple with optional filter v in = 25v, i out = 500ma 40mv p-p
MC34063A linear integrat e d circuit unisonic technologi es co., ltd 6 of 9 w w w . uniso nic.co m.t w qw-r103-008.j ? volta ge i nverti ng con v erter tes t condit i ons result s line r e gulation v in = 4.5v ~ 6.0v, i out = 100ma 3.0mv = 0.012% loa d reg ulation v in = 5.0v, i out = 10ma ~ 100ma 0.022v = 0.09% output ripple v in = 5.0v, i out = 100ma 500mv p-p short circuit c u rrent v in = 5.0v, r l = 0.1 ? 910ma efficienc y v in = 5.0v, i out = 100ma 62.2% output ripp l e with optional filter v in = 5.0v, i out = 100ma 70mv p-p
MC34063A linear integrat e d circuit unisonic technologi es co., ltd 7 of 9 w w w . uniso nic.co m.t w qw-r103-008.j ? external current boost connections for ic peak greater than 1.5a
MC34063A linear integrat e d circuit unisonic technologi es co., ltd 8 of 9 w w w . uniso nic.co m.t w qw-r103-008.j ? ty pic al c h ara ct e ris tic s ou tp ut switch on-off tim e v e rs us osci l l a t or timi ng cap a ci to r osc illator timing capacitor, c t (nf) timing cap a ci t o r wavef o r m 10 s/div 10 3 10 2 10 1 10 0 10 -2 10 -1 10 0 10 1 v cc = 5. 0v pi n 7 = v cc pi n 5 = gnd t a = 25 t on t of f pi n 1, 5, 8 = op en c t = 1. 0nf t a = 2 5 v cc = 5. 0v p i n 7 = v cc p i n 2 = gn d
MC34063A linear integrat e d circuit unisonic technologi es co., ltd 9 of 9 w w w . uniso nic.co m.t w qw-r103-008.j ? design fo rmula ta ble calculation step-down step-up voltage-inverting t on t off v out + v f v in -v ce(sat) (t on +t off ) max 1 f min 1 f min c t 4x10 -5 t on 4x10 -5 t on 4x10 -5 t on i sw 2i out(max) r s 0.3/i sw 0.3/i sw 0.3/i sw l (min) c o i out t on v ripple(p-p) v ce ( sat ) - saturatio n volt age of the o u tp ut s w itch. v f - f o r w a r d volta g e drop of the ri ngb ack rectifier . t h e fo llo w in g p o w e r su p p ly ch ara c teristic s mu st b e ch o sen: v in - nomin a l in put voltag e. v out - desire d outp u t voltag e, v out = 1 .25(1+ r 2 /r 1 ) i out - desire d outp u t current. f mi n - minimum d e sir ed outp u t s w itc h ing fre que nc y at the selected values for v in and i out . v r i pple( p-p) - desire d pe ak-to-pe ak output r i ppl e volta ge. in practice, the calcul ated va lu e w i ll n e e d to be incre a sed due to the ca p a citor eq uiva le nt series resist ance a nd b oar d la yo ut. t he ripple v o ltag e sh ould be kept to a lo w val ue since it w i l l dire ctl y effect the li ne an d loa d re gulati on. utc as s u m e s no r e s pon s i bility f o r equipm e n t f a il u r es th at r e s u lt f r om us ing pr oducts a t v a lue s that ex ceed, ev e n m o m entar ily , r a ted v a lues ( s uch a s m a x i m u m r a tings , oper ating condition r anges , or othe r par am eter s ) lis t ed in pr oducts s pecif ications of any and all u t c pr odu c t s des cr ibed or contained her ein. u t c pr oducts ar e not des igned f o r us e in lif e s upp or t appliances , dev i c es or s y s t e m s w her e m a l f unction of thes e pr o ducts can be r eas onably ex p e cted to r e s u lt in per s onal injur y . r epr oduction in w hole or in p a r t is p r ohibited w ithout the pr ior w r it t en cons ent of the copyr i ght ow n e r . t he inf o r m ation pr es e n ted in this docum ent does not f o r m par t of any quotation or contr a ct, is believ e d to be accur a te and r eliable and m ay be changed w i thout notice.
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