DANIEL M. MITCHELL
`
`ANALYSIS
`
`REGULATOR
`
`
`
`1
`
`PI 1013
`
`

`

`
`
`DC-DC Switching
`Regulator
`Analysis
`
`Daniel M. Mitehell
`MHWNWW
`Eel-Humm-
`
`fleflrIIIr-HIII mu Ell-mill"!
`H-MlLl—Hnmw
`“Hunt-“Hm
`'HWMMIW
`HERE-Hem
`WW1“
`
`
`
`
`
`2
`
`

`

`IBEH WEE-Elia
`
`Cam-mm I: 1m hr Human-mu. Elm. all mm.
`I%hudmuuumudEuugflfimmfilfimugarunflnd
`unfllhltUnll-ai hmcwmummupnurm
`
`IEEH: EI-EI'f-EIHEE‘I'J-E
`
`mmfirmhflmwfi.flmmemfluflfiu.
`”warn-1|? i'l-[rl-nnui amiabfldfllpdmfimnpfluiur
`mmmmihrJlmmranE-fiflm
`h Tech-Id Tmrm.
`
`Pn'n-biufl-IJ‘. hundhyfl. R.fl-Hl'l-iflfl' 5 Sam may.
`
`
`
`3
`
`

`

`
`
`Putin-m Hedda-hm IHI'IIII
`
`31'
`
`1.1 Heat-rule {tantrums
`
`Friar tn the Infludutfieu el‘ flied-hematite haunted-circuit PWt-l
`manner-n, perhap- the event eemmeu PEI-flit eentrel. tefiniw E-Eln-
`dmd simply el‘ temp-ting the utuel eutput. m- an Inning thereef. te
`Inference listill carriage-riding tn the desired mm: (Fig. 3.11 With
`flit ttdtniq-ee. When. the lets-ll eutput ire-names tern: lie-er.I 31 is turned
`“Iii-11m the eutput blue-mes ten high. 31 is turned eff. Neither Em..-
`am- tm he find. Ind the 1li'erielinle fi'e-q'ueizie:.r el' ep-eretien ie it fllnhtien
`flfl.L.-C'.tndthehgnteraeish.where hiethedifiereneehetweentlle
`tint-rend letter trip paints efthe Echmitbtrigger emitter-star." Theee
`regulate”- ere treL'iIiuai}r lieecrihed as hglre'tereizicI Free-naming, seyn-
`chreneus. ereimptfi'aaheng-heng regulatera. Hystereticacentrelled reg-
`ulators are simple tun-implement and reependresidlsr msudden leefl
`isngesfiuttheyhaveanunpredictehleneieeepecflmalting EM]
`mtc'elmerediflicult
`
`u Hale-Freeway emu-n
`
`Filed-hem PW neutral inherent!“ twitching Mullter neutral
`techniquethntiameetwideleufltltedly.Twerfllnmfitrthiem II]
`the rude cveiLehiiitr entree-cent litigflilz.r whit-tinted fined--fi1qu.cnc:r
`PW}! integraheli-eirmiil: HIE] eentrnliere Ind [E] the greeting need te
`minimisethespuiieeaemiesiemefe'eitchingregnleterainutcrees-
`ing’lj' eeneititre cemputetienel and eernmunicetitre enfimnrnente. fie
`we shellee-e inthe-Item:senetinn.l the neitehingregulnter is anrelific
`misegenereuar.1heteakefeenteiningthisneieeismadeensierbr
`fixed-[requiem eperatien. With prep-er filtering. greunding. bending.
`and ehielding. switching regulaters can he meme-dull;- uee-d in. EMI-
`ltnsititre enpfieetiens.
`There are user-3 were that fixed-fiequencj' FWH centre-I can be ill]-
`plemente-tl.
`including the me- ef mierepcec-emen emit digital eig'nal
`preeeaemg circuits 'erttn approprmte ensleg-te-eiglteJ converters.
`Nevertheless. the basic ingredients el'alnreet all existing PWllil IE
`cannullers thetare usedflir aims-1e 1i'ulinltagre neutral eretljen adjustable
`elect fer eetting the switching ire-queue}. [2] an eutput wattage errer
`amplifier. [3] same-teeth generaterihrpree‘idinge eewtenth eig'eel that
`iesynehreniaedte ths c1ect.a.n|i{4) eeecnparater the: temperes the
`mmuterrer eignel with the nemeetheignsl. Themtputefthe ten-Ir
`parater iethesignai Eran: which the drivetethe cenwefledswinchee
`15 derived.
`
`' Ih. ermine. thefllue-fl'eipt-ri‘te-r ESE IIIIJ' eliminate Ir'l'ltr‘llrr 'I'll'lll DIE.
`
`
`
`4
`
`

`

`:-
`
`paw-Dc mm. “mam-I-
`
`Fimm 3.3 Il-hmfi a simple rum cuntrnller with a fixadifiaquency
`fixa-dmplitud: fi-fll'l'tflfl-tll signal] awn-d tu- 'I'J'IE' bani: truck puma-Hr.
`The mdthal‘the PWM DHpuJaBiathu umhetweantha rust ufthe
`mart-nut]: anagram:- lufl. the interim-m Elf thll Elf-Ell” “fill-15E- Witl'l. HEB
`Fugitive-going samuth aligns-1, ur ramp. If u. in L11: error mltage am-
`plitude. which in Ellw‘lll'ltd millage Elm-fly Wifll til-put Eutha- switch-
`ing fraquencarand '|.-', ii. the nut-19th volt—531a umpfltufle,thenthe duty-
`flattur can he appxmjmnlfl by the continuum Exprmlm
`
`d - —'
`
`[3.3]
`
`
`
`Flnurlll:
`
`flimplll Manama FWH mull
`
`
`
`
`
`5
`
`

`

`Plum-mm mm {P'II'HI
`
`fl
`
`Aleuerthendeeire-d eutputvettege predureeehigherrereeltege
`=-
`-thme1en5erflflptdeewtneh11ntern_reenlte1neninfleeeed
`
`"
`- -II e-eltege. 'I'I'IeepIeretienel amplifier'et'e-edheelr neteIrerlt.eene1'e.t-
`
`Inf-31 endIg. help determine the etehilii'f end reepenee hi the
`
`:_
`_-reguleter. Iffi'iethedegeinei'theerreretnplifierend‘l-I’i
`
`.-'
`theenen-leepinpnteeltegetetheerrererenlifler. thenthedrepen-
`'
`IEHi-EGIIHIIiE
`
`
`
`G‘H”
`
`_ £1 E v.11 _ v.1:
`1F;
`1*. we.
`
`
`11.1w. _ v.3“
`11v. ' 1r.
`
`[3.3]
`
`
`
`thII: nut-pet- veltei'l: 1'l Ii'i'ri-tled Idem-I tn the mime-I: ire-ital: nrier te
`I'-
`'-'-
`--
`- End. t-e them-erenIpIilirr.the11 Geflpie I1e1'1'IIreIl1II1Ineliniiljr reduce-d.
`
`-
`thet- thr. ‘I'llutr III‘IiI: gain In liq. £3.31 depend: directly upen the
`
`ef input when 15- Per “Elli-ennui! 1III'ith with input Wit-en
`
`_'
`-
`-
`there 1M:
`111:
`r. emblem :in meintninini eneuih grin e1:
`'_ 1...... e1 mill: pIthItnIenIee reqmrerernlre Witheut Helene; 1net-I.11I1l|.t_l.r
`E- VII-III-
`’Ih'flpre'blemeen heeeeremnehy neingen-eelledfeed-Fenrerd eentrel
`
`E-rrhiehtheeeurteethenpply veltege "i-"..iedeeiwdlinn1thei1111ut
`
`.
`- I. enlthe 1"..1nthie nee.the11-eelteel'teeth I'eltege Vpiedireetljr
`
`-'
`I- I'enelte 1-"..Ar eenbeee-en EIe1:e Eq. [3.31.1.I1e Ide epen-Ieepgein
`
`n it then lune-tent evertlie fut] tense ei' 1Ireluee ef'i’..Furl:hern1ere.
`'3'
`I find. '|I"I.].'l.IB efe" Vii: ennetenteeer 'I'erietiene in 1-H. Title meene
`F:
`ideeiIrJinereguletieneenhemeinteined neingenlyfeed—femerd
`1'
`-
`I
`elleurieg the feedback eentrel leep te he eptireir-ed fier leed
`
`.- I'II-‘I111et'eed-fi1merdP'fi'hIe-1nu'el technique e11 deeerilJ-ed ie
`
`-'tIed te hunk-derived regnlen1re-LTnIertunetel3-. the eewteeth gen-
`::
`.- efnreet ]1Ireeent-de1.r It] eentrellere enerete frenI e11 internelly
`~_
`.I
`'1:ed if... ee Feed-flurerd eentrel ie nel: peeeihle. [in the ether hen-d,
`
`
`-
`- -IE renueflereheuentenyhnilt-in pretender. end meniteringi‘ee-
`
`- I..thetdreignererhdnetelere1reinhludeintheirelderdie:rete~
`
`mat. Ml urnLru-i'chqul deulgm
`' PM! eentrellere thet ere reedeied efle—r Fig. ELE. 1III'hetJIeI' they nee
`_n fixed emu-teeth amplitude er net. ere efien eelled 'eeltege-Inede"
`
`die-1'1: elnce 111113; ueitege infernIetien ie11eed. II: will heeheern in
`filial-1.6 tint. eurrent inihrmetlen in edditien te I'eltege infernmtien.
`
`“flute and helium-emit edeentege pertirnlerlfi' fill- heeet— e11Id “encir-
`writ-pd mtdjiufl rfluintfli'l. fine may ere-riding: current inflrr—
`
`_ lfl'iiilll in: 1.11:: en. melee: :IE'tl'Ie Witching cement waeefiwmIn plane
`
`idea meta-nth pm; alter 111. the en: refinement efthe indium
`
`Slur-rent “referee in. elem-1th IIIlIII:I e where enema aft-he switching
`
`.Frrent ere-redeem. een he prefidld with I 1.111!" tUflEht-flm I‘fllll'fll‘
`
`.-ll1et ie etheru'iee negtigihle. In prettier, e rmettuhit eIrrenl tfl-‘lfl-
`
`Elrlner li1r ieeletien end eeelinfi might Illl} he need- Since truly the
`
`
`
`
`
`
`
`6
`
`