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1 s Now P of To ln mo ou ON Smionduo, pls visi ou wsi ON Smionduo nd h ON Smionduo logo dmks of Smionduo Componns ndusis, C d ON Smionduo o is susidiis in h Unid Ss nd/o oh ounis. ON Smionduo owns h ighs o num of pns, dmks, opyighs, d ss, nd oh inllul popy. A lig of ON Smionduo s podu/pn ovg my ssd ON Smionduo svs h igh o mk hngs wihou fuh noi o ny podus hin. ON Smionduo mks no wny, psnion o gun gding h suiiliy of is podus fo ny piul pupos, no dos ON Smionduo ssum ny liiliy ig ou of h ppliion o us of ny podu o iui, nd spifilly dislims ny nd ll liiliy, inluding wihou limiion spil, onsqunil o inidnl dmgs. Buy is sponsil fo is podus nd ppliions ug ON Smionduo podus, inluding omplin wih ll lws, gulions nd sfy quimns o sndds, gdlss of ny suppo o ppliions infomion povidd y ON Smionduo. Typil pms whih my povidd in ON Smionduo d shs nd/o spifiions n nd do vy in diffn ppliions nd ul pfomn my vy ov im. All oping pms, inluding Typils mus vlidd fo h usom ppliion y usom s hnil xps. ON Smionduo dos no onvy ny lins und is pn ighs no h ighs of ohs. ON Smionduo podus no dsignd, inndd, o uhoizd fo us s iil omponn in lif suppo sysms o ny FDA Clss 3 mdil dvis o mdil dvis wih sm o simil lssifiion in foign juisdiion o ny dvis inndd fo implnion in h humn ody. Should Buy puhs o us ON Smionduo podus fo ny suh uninndd o unuhoizd ppliion, Buy shll indmnify nd hold ON Smionduo nd is offis, mploys, susidiis, ffilis, nd disiuos hmlss gins ll lims, oss, dmgs, nd xpnss, nd sonl ony fs ig ou of, dily o indily, ny lim of psonl injuy o dh ssoid wih suh uninndd o unuhoizd us, vn if suh lim llgs h ON Smionduo ws nglign gding h dsign o mnufu of h p. ON Smionduo is n Equl Oppouniy/Affimiv Aion Employ. This liu is suj o ll pplil opyigh lws nd is no fo sl in ny mnn.

2 Appliion No 753 Novm 00 mplmning A Pimy Sid Pk-Cun-Mod Hlf-Bidg Conv Alin pd n Edwd Jon Gldish io Rgino Fihild Smionduo Cop EMS Thnologis 5 Cswood Rd 05 Tns Cnd Highwy Mounin Top, PA S-Ann-D-Bllvu, QUE US 8707 Cnd H9X 3R As - Pk-un-mod (PCM) hlf-idg push-pull pow onvs inhnly unsl s sul of vol-sonds iui symmy [], []. A poposd ppoh [3] is snsiiv o iui symmy nd ovlod opion. A nw PCM hlf-idg onv wih nsfom isolion is poposd. Th poposd onv uss n uxiliy winding nd wo diods wih modifid un sns o oin puls-y-puls PCM onol h is ffiv und oh noml nd ful oping mods. Thfo, h possiiliy of mgni suion du o iui opion symmy is limind. Th uxiliy nsfom winding onsiss of smll gug wi hving h sm num of uns s h pimy winding. Opion of 0W dsign ws vifid nd hs n dployd on h sp sion pogm.. noduion Th hlf-idg push-pull onv is n iv opology in ppliions hving high us volgs inmdi pow lvls. mpon ii h h dsign mnl o fiion whil mining onomil. An oping limiion of his opology is is inhn insiliy whn PCM fdk is usd fo onol [], [], [4], [5] du o hg symmy fom - Mismhd swihing popgion dlys - Evn-od su-hmoni osillion of fdk loop [5] - Pow nsfom onsuion symmy - Diffns in C nd C oupling pio vlus. Unompnsd Blning Winding Opion A volg lning winding nhnmn ws inodud in [3] nd is shown in Figu. Th lning winding is implmnd ug smll gug oupld winding in h pow nsfom, T, hving h sm num of uns s h pimy winding. Alhough his iui is signifin opology impovmn ( hlf-idg push-pull PCM opology nno implmnd wihou lning winding), n insiliy mod mins. Blning winding T is onnd wn h n poins of oupling pios C nd C, nd h junion poin of diods D nd D wih poliy shown in Figu. Th lning winding ondus o hg h low volg pio whn h oppog nsiso fom h loop hving h high volg pio ondus. n h 00 Fihild Smionduo Copoion Rv. A, Novm 00

3 susqun disussion, h pin of C is ssumd o g hn h of C suh h C > C. Blning winding un ondus hough diod D whn Q uns-on. in D D C T C in/ δ T T Q T - in/ δ - in/ δ in/ - δ Q T T Ns Ns D3 D4 R - N fdk Figu Unompnsd lning winding Und noml mod opion, lning winding onduion ss fo h nd of h duy yl (Figu ). Th signl fd o h un fdk loop y h un nsfom winding T h nd of h onduion yl is n u psnion of h nsfomd un fom T. Hn, no modifiions o sndd fdk loop onol quid. Th volg of sog pios C nd C s funion of lod, lning winding lkg indun nd sisn, nd nsiso R ds(on) hv impon pfomn impliions. Sling C nd C wih insuffiin pin o xssiv psii volg dops duing onduion hinds h ffivnss of h lning winding. Th mximum pio ippl volg wn h ginning nd nd of h nsiso onduion yl mus no xd h volg dop of lning diod. f h C, C ippl volg is xssiv und noml mod opion, h lning winding will ondu h ginning of h yl, ing h possiiliy h h lning winding onduion im will xd h duy yl duion. Th un fdk loop will no long psn h lod un nd h un fdk loop nsf funion will hng. d mx d mx T Q Q T d mx slop ompnsion d mx FEEDBACK Q 0 T s Q Figu Unompnsd un fdk signl Equivln sis sisn (ESR) nd quivln sis indun (ES) inodud y sog pios, PCB s, nd nsisos lso imp h lning winding onduion im. Th lning winding lkg indun is dominn ov iui lyou ES, nd is dpndn on h dsign of h pow nsfom. Th lning winding ondus Q un-on whn ( C - C ) > ( D Q ). Th of is of h lning winding un is invsly popoionl o h lkg indun p xpssion (). A lg lkg indun 00 Fihild Smionduo Copoion Rv. A, Novm 00

4 n sul in h lning winding hving insuffiin onduion im vill o hg h low volg oupling pio. di T C d d wh () T C Q Th pid spons fom PCM onol pos h swihs fom xssiv un h suls fom nsfom suion. Th sho onduion yl is mind soon y h dion of mgni suion. Th long onduion yl is limid y h mximum duy yl (<50%) piliy of h onoll. Unsl opion will ou s im symmy inss [], [], [5].. mplmnion Of Th Unompnsd Blning Winding Th pupos of h hg lning winding is o quliz h volg wn oupling pios C nd C, pmiing PCM onol opion. Th hging volg vill o pio C is h diffn wn h nsfom lning winding volg oss T, h sum of pio volg C nd h diod volg dop D. ss hn vol would ypilly vill, suling in lning winding lkg indun limid di/d hging p xpssion (). Whn C > ( in - C - d - Q ) nd Q ondus, h lning winding ondus un s in Figu 3. T povids h fdk un infomion whih inluds lning winding un, h pow nsfom mgnizing un nd oupu un infomion. d mx d mx T Q Q T d mx slop ompnsion d mx FEEDBACK Q Q 0 T s Figu 3 Unompnsd un fdk signl Th lning winding un T my qui susnil im invl o poply hg h oupling pio. Th yl duing whih h lning winding ondus my nd pmuly. Th x un fom h lning winding is inludd in h un fdk onol signl nd my inp h onol signl. f h wo signls inp whil h lning winding is onduing, Q will un-off pmuly pvning C nd C fom ompling hi hg lning. f his ous, h ponil diffn wn pios C nd C will ins yl-y-yl. Q onduion yl will ins unil h onoll imposd duy yl limi d mx is hd. Th duy yl im of Q is shond s sul of h onol un signl inpion wih h pogmmd o signl. Opionl insiliy nd nsfom mgni suion will sul.. mplmnion Of Th On-Tun Compnsd Blning Winding Figu 4 illuss iui modifiion fo moving h lning winding un fom h onoll un sns signl. Whn C > ( in - C - D - Q ), h lning winding un ondus s in Figu 4. T is oupld o T. Cun snsd y T is sud on fom h of T suh h C, C lning un is no 00 Fihild Smionduo Copoion 3 Rv. A, Novm 00

5 psn in h un sns winding T C. Th fdk loop signl is now n x psnion of h oupu un, pvning h ly yl minion ondiion dsid fo h unompnsd iui. in - T T T C C in/ δ T T in/ - δ T - in/ δ - in/ δ Figu 4 On-un ompnsd lning winding Q Q T T ompng slop FEEDBACK 0 T - T Figu 5 On-un ompnsd un fdk signl Th of is of h lning winding un is limid y h lning winding lkg indun p xpssion (). Duing un limi opion, mximum duy yl is dud nd Q my un-off fo h lning winding hs hd im o finish hging C nd whil h lning winding is sill onduing (Figu 5). Conduion nds fo C is lnd wih C. Th ondiion will dio yl-y-yl suling in opionl insiliy nd nsfom suion.. mplmnion Of Th Two-Tun Compnsd Blning Winding Figu 6 illuss fuh iui nhnmn h nsus sl opion vn fo sho onduion puls widhs ssoid wih ovlod ondiions. A on-un T in sis wih h pimy is oupld o wo-un T in sis wih h lning winding. Th un in h lning winding is hus sud wi fom h ing snsd in h pimy. As shown in Figu 4, h fis suion is quid o povid h un fdk loop wih n u psnion of h oupu un, pvning n ly minion of h duy yl duing noml opion. A sond suion is quid und un limiing opion o xnd h duy yl whil h lning winding ondus, pvning nsfom suion (Figu 7). T in T T T C C in/ δ T T in/ - δ T - in/ δ - in/ δ Q Q T ompng slop T - ( x T ) - Figu 6 Two-un ompnsd lning winding FEEDBACK 0 Figu 7 Two-un ompnsd un fdk signl Rfning Figu 7, fo h nd of h onduion yl, h lning winding ss onduion nd h un fdk loop will hv n u psnion of h oupu un. Und noml opion, h lning winding un uns o zo fo h nd of h duy yl nd will no ff h hisis of h onoll fdk loop. f h lning winding is onduing un whn h duy-yl would nomlly min, h imp of h sond lning un suion is o du h un sns signl, xnding h duy-yl of Q. 00 Fihild Smionduo Copoion 4 Rv. A, Novm 00

6 5 Rv. A, Novm Fihild Smionduo Copoion Duing un limi mod, insiliy is pvnd us h lning winding onduion sons o zo fo Q uns-off. Pow nsfom vol-sonds ln is hivd, pvning opionl insiliy nd nsfom suion. Th lning diod will hv sligh, u ngligil ff in offg h ning of h nsfom B-H uv.. Simulions And Disussion Expssion () povids n nlyil psnion of h lning winding un wvfom fom Figu 6. Expssion (3) povids n nlyil psnion of h oupling pio volg ing hgd y h lning winding nd h pimy un. Ciui psiis inludd. Ths xpssions vlid duing lning winding un onduion 0 < <, wh is h winding un onduion im. δ δ C C C K3 C C K K Ci d in () Ciui pms dfind s: MOSFET R ds(on) 0.6 lning winding sisn 0.68 C 8.3µF C 8.5µF lning winding lkg indun 0.73µH in us volg 0 d lning winding sisn 0.84 Ci pio volg fo Q onduion 6. Ci pio volg fo Q onduion 58.8 δ oupu ippl un fld o h pimy winding duing.05a iniil pimy un nsiso un-on 4.77A duion of duy yl 4.9µs os K3 os K K i() wh δ δ C C C C 3 C i C Z Ci d in Z os os C C C os os C C C os C C C () v Ci d in C δ δ δ wh (3)

7 Ciui psiis hv dmpning ff on h lning winding un wvfom. Th ff of hs psii lmns is illusd in Figus 8, 9, 0 nd Ω i _hlf ( ) i ( ) uh 0.73 uh.404 Figu 8 nflun of lkg indun on lning winding un i p_hlf ( ) i p ( ) 4 0.6Ω uh 0.73 uh Figu 9 nflun of lkg indun on pimy winding un µH i _hlf ( ) i ( ) i p_hlf ( ) i p ( ) Ohm 0.6 Ohm Figu 0 nflun of nsiso R ds(on) on lning winding un 0.73 µh Ohm 0.6 Ohm Figu nflun of nsiso R ds(on) on pimy winding un A lg lkg indun suls in lning winding un hving low nul fquny nd mpliud. Th ff on h pio hg is duion of vill ngy in h puls o ln h oupling pio. A lg num of pulss quid o so ln o h pio. A lg iui sisn (fom h nsiso, h nsfom winding nd od s) suls in lning winding un of low mpliud nd high nul fquny. Avill hging ngy o h oupling pio is dud. Th volg unln wn C nd C (.4) in hs simulions is lg nd ws sld fo puposs of nlysis. Und opion, h lning winding would so h ln wihin fw onduion yls. ifiion of xpssions () nd (3) ould no pfomd in iui fo h lg volg imln usd in his nlysis. nsd, vlidion of hs xpssions ws hd vi Spi implmnion of h iui fom Figu 6. Simulion suls shown in Figu.. Ts Rsuls Colion wn h numil nlysis nd simulion suls vy good. Th numil nlysis povidd pk lning winding un of 404 ma vsus 406 ma fom h Spi simulion, diffn of 0.5%. 00 Fihild Smionduo Copoion 6 Rv. A, Novm 00

8 This dsign hs n vifid in 0W pow supply in h sp sion pogm. Th pow supply hs n dployd nd is in svi. 7.0A 600mA 6.0A 400mA Mximum ma 4.0A.0A 00mA 0A >> 0A 8us 9us 0us us us 3us (T) -(T) Tim Figu Spi simulion suls. Conlusion An onomil nd sily implmnd mhod fo dsigning PCM hlf-idg push-pull pow onv wih nsfom isolion hs n dsid. This dsign hs povn islf o oh uggd nd lil, limining h insn of nsfom suion und oh noml nd ful oping mods. Exlln olion wn h nlyil xpssions nd h Spi simulion ws hivd. X. Aknowldgmn Th uhos wish o hnk EMS Thnologis Cnd imid fo hi suppo in pping his pp. Thnks lso xndd o Ron H. Rndll fo his dioil ssisn in h ppion of his doumn. X. Rfns [] Shi-Ping Hsu, A. Bown,. Rnk, R. Middlook; "Modling nd Anlysis of Swihing DC-o-DC Convs in Consn-Fquny Cun-Pogmmd Mod"; PESC 79 Rod (EEE Puliion 79CH46-3 AES); pp [] R. Rdl,. Novk; "nsiliis in Cun-Mod Conolld Swihing olg Rgulos"; PESC 8 Rod (EEE Puliion 8CH65-7 AES); pp [3] Dsign Rviw: A 300W, 300KHz Cun-Mod Hlf-idg Pow Supply wih Mulipl Oupus ug Coupld nduos; Uniod Pow Supply Dsign Smin; SEM-800, Topi A. [4] Cun mod onol, Uniod Pow Supply Dsign Smin, SEM 400 Topi. [5] Uniod Appliion No U-97; "Modling, Anlysis And Compnsion Of Th Cun-Mod Conv". 00 Fihild Smionduo Copoion 7 Rv. A, Novm 00

9 TRADEMARKS Th following gisd nd ungisd dmks Fihild Smionduo owns o is uhoizd o us nd is no inndd o n xhusiv lis of ll suh dmks. ACEx AivAy Boomlss CoolFET CROSSOT DOME EoSPARK E CMOS EnSign FACT FACT Qui Sis FAST FAST FRFET GlolOpoisolo GTO HiSC C Aoss h od. Aound h wold. Th Pow Fnhis Pogmml Aiv Doop mpliddisonn SOPANAR ilfet MioFET MioPk MCROWRE MSX MSXPo OCX OCXPo OPTOOGC OPTOPANAR PACMAN POP Pow47 PowTnh QFET QS QT Opolonis Qui Sis RpidConfigu RpidConn SENT SWTCHER SMART START SPM Slh SupSOT -3 SupSOT -6 SupSOT -8 SynFET Tinyogi TuTnslion UHC UlFET CX DSCAMER FARCHD SEMCONDUCTOR RESERES THE RGHT TO MAKE CHANGES WTHOUT FURTHER NOTCE TO ANY PRODUCTS HEREN TO MPROE REABTY, FUNCTON OR DESGN. FARCHD DOES NOT ASSUME ANY ABTY ARSNG OUT OF THE APPCATON OR USE OF ANY PRODUCT OR CRCUT DESCRBED HEREN; NETHER DOES T CONEY ANY CENSE UNDER TS PATENT RGHTS, NOR THE RGHTS OF OTHERS. FE SUPPORT POCY FARCHD S PRODUCTS ARE NOT AUTHORZED FOR USE AS CRTCA COMPONENTS N FE SUPPORT DECES OR SYSTEMS WTHOUT THE EXPRESS WRTTEN APPROA OF FARCHD SEMCONDUCTOR CORPORATON. As usd hin:. if suppo dvis o sysms dvis o sysms whih, () inndd fo sugil impln ino h ody, o () suppo o su lif, o () whos filu o pfom whn poply usd in odn wih insuions fo us povidd in h lling, n sonly xpd o sul in signifin injuy o h us.. A iil omponn is ny omponn of lif suppo dvi o sysm whos filu o pfom n sonly xpd o us h filu of h lif suppo dvi o sysm, o o ff is sfy o ffivnss. PRODUCT STATUS DEFNTONS Dfiniion of Tms Dsh dnifiion Podu Sus Dfiniion Advn nfomion Fomiv o n Dsign This dsh onins h dsign spifiions fo podu dvlopmn. Spifiions my hng in ny mnn wihou noi. Pliminy Fis Poduion This dsh onins pliminy d, nd supplmny d will pulishd l d. Fihild Smionduo svs h igh o mk hngs ny im wihou noi in od o impov dsign. No dnifiion Ndd Full Poduion This dsh onins finl spifiions. Fihild Smionduo svs h igh o mk hngs ny im wihou noi in od o impov dsign. Osol No n Poduion This dsh onins spifiions on podu h hs n disoninud y Fihild smionduo. Th dsh is pind fo fn infomion only. Rv.

10 ON Smionduo nd dmks of Smionduo Componns ndusis, C d ON Smionduo o is susidiis in h Unid Ss nd/o oh ounis. ON Smionduo owns h ighs o num of pns, dmks, opyighs, d ss, nd oh inllul popy. A lig of ON Smionduo s podu/pn ovg my ssd ON Smionduo svs h igh o mk hngs wihou fuh noi o ny podus hin. ON Smionduo mks no wny, psnion o gun gding h suiiliy of is podus fo ny piul pupos, no dos ON Smionduo ssum ny liiliy ig ou of h ppliion o us of ny podu o iui, nd spifilly dislims ny nd ll liiliy, inluding wihou limiion spil, onsqunil o inidnl dmgs. Buy is sponsil fo is podus nd ppliions ug ON Smionduo podus, inluding omplin wih ll lws, gulions nd sfy quimns o sndds, gdlss of ny suppo o ppliions infomion povidd y ON Smionduo. Typil pms whih my povidd in ON Smionduo d shs nd/o spifiions n nd do vy in diffn ppliions nd ul pfomn my vy ov im. All oping pms, inluding Typils mus vlidd fo h usom ppliion y usom s hnil xps. ON Smionduo dos no onvy ny lins und is pn ighs no h ighs of ohs. ON Smionduo podus no dsignd, inndd, o uhoizd fo us s iil omponn in lif suppo sysms o ny FDA Clss 3 mdil dvis o mdil dvis wih sm o simil lssifiion in foign juisdiion o ny dvis inndd fo implnion in h humn ody. Should Buy puhs o us ON Smionduo podus fo ny suh uninndd o unuhoizd ppliion, Buy shll indmnify nd hold ON Smionduo nd is offis, mploys, susidiis, ffilis, nd disiuos hmlss gins ll lims, oss, dmgs, nd xpnss, nd sonl ony fs ig ou of, dily o indily, ny lim of psonl injuy o dh ssoid wih suh uninndd o unuhoizd us, vn if suh lim llgs h ON Smionduo ws nglign gding h dsign o mnufu of h p. ON Smionduo is n Equl Oppouniy/Affimiv Aion Employ. This liu is suj o ll pplil opyigh lws nd is no fo sl in ny mnn. PUBCATON ORDERNG NFORMATON TERATURE FUFMENT: iu Disiuion Cn fo ON Smionduo 95 E. 3nd Pkwy, Auo, Colodo 800 USA Phon: o Toll F USA/Cnd Fx: o Toll F USA/Cnd Emil: odli@onsmi.om Smionduo Componns ndusis, C N. Amin Thnil Suppo: Toll F USA/Cnd Euop, Middl Es nd Afi Thnil Suppo: Phon: Jpn Cusom Fous Cn Phon: ON Smionduo Wsi: Od iu: hp:// Fo ddiionl infomion, pls on you lol Sls Rpsniv