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c(din)鿴Ԕ(x)f(shu)
l(f)ڣ[2011-2-28] [5123]Ρ
Ї(gu)늚Ј(chng)ُ(gu)W(wng)
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1ya(chn)ƷԴоƬ(li)͉(wn)(LDO)c͉(wn)(VLDO)늸(ch)ܵDC/DCBUCKBoostBUCK- Boost(ch)ܵCharge Pumps(ַQ(chng)o(w)Б(yng)_(ki)P(gun)(wn))xùlʸߵоƬԽͳɱ߅·đ(yng)óɱ
1ya(chn)ƷԴоƬ(li)
͉(wn)(LDO)c͉(wn)(VLDO)늸(ch)ܵDC/DCBUCKBoostBUCK-Boost(ch)ܵCharge Pumps(ַQ(chng)o(w)Б(yng)_(ki)P(gun)(wn))늳س늹BatteryChargers늳رo(h)
1.1xԴоƬĎc(din)]
xa(chn)ˇ죬Ʒ|(zh)(yu)a(chn)SҮa(chn)ƷxùlʸߵоƬԽͳɱ߅·đ(yng)óɱx÷bСоƬԝM(mn)ya(chn)Ʒ(du)weҪxüg(sh)ֺ֧õa(chn)SңQ(yng)O(sh)Ӌ(j)еĆ(wn)}xîa(chn)ƷYRȫƷDEMOՈ(qng)ܴ؛оƬxîa(chn)Ʒ/r(ji)ȺõоƬ
1.2ȑ(yng)ıya(chn)ƷԴϵy(tng)O(sh)Ӌ(j)Ҫl(f)
ya(chn)ƷԴO(sh)Ӌ(j)Ҫϵy(tng)(j)˼S_(ki)l(f)늳ع늵O(sh)r(sh)T֙C(j)MP3PDAPMPDSCȵĮa(chn)ƷԴϵy(tng)O(sh)Ӌ(j)t(hu)Ӱ푵(g)ϵy(tng)ļܘ(gu)a(chn)ƷԽMϡԪxܛO(sh)Ӌ(j)ʷܘ(gu)ͬϵy(tng)O(sh)Ӌ(j)Ҳ(yng)Ĺ(ji)ʡ늳ĽǶȳl(f)ӿ]
F(xin)ڱya(chn)Ʒ̎һ㶼O(sh)Ўׂ(g)ͬĹB(ti)ͨ^(gu)ͬĹ(ji)ģʽ(e˯ߡ˯ߵ)ɜpٌ(du)늳^ġe͡ߡģʽͨ(sh)ͨ^(gu)P(gun)]ֲ̎ʹõă(ni)·(li)̎Ĺ
2 LDOc(yng)
̎ԽM(jn)乩늾ҪøͬԴ늉ͨ^(gu)ö(g)ͨD(zhun)Q(li)(sh)F(xin)(bio)(zhn)ľ(xin)Ե͉(wn)(LDO)
LDO(xin)Ե͉(wn)(jin)εľ(xin)Է(wn)䱾DCo(w)_(ki)P(gun)늉D(zhun)Qֻܰݔ늉͵늉ă(yu)c(din)ʹ÷(jin)ͳɱȱc(din)ڟD(zhun)QЧʽƵݔ늉ݔ늉ֵ
*LDOă(ni)Y(ji)(gu)
LOOă(ni)?f)Y(ji)(gu)ͨMOSFETo(h)ФػOݔСzy(c)^(gu)/^(gu)ᱣo(h)·ݔ늉ȡӷ·^Ŵ(zhn)Դʹ·Ȏײ֘(gu)µLDO߀_(ki)C(j)ϵy(tng)ԙzPower OK
LOOă(ni)?f)Y(ji)(gu)ͨMOSFETo(h)ФػOݔСzy(c)裬^(gu)/^(gu)ᱣo(h)·ݔ늉ȡӷ·^Ŵ(zhn)Դʹ·Ȏײ֘(gu)ɣµLDO߀_(ki)C(j)ϵy(tng)ԙzPower OK
ɤģֹoB(ti)LDOĴP(gun)I(sh)(j)a(chn)ƷO(sh)Ӌ(j)Ta(chn)Ʒؓ(f)d(du)ܵҪY(ji)ĴҪ(li)xLDO
*͉(wn)(VLDO)
͉(wn)(VLDO)ݔ늉ӽlV䉺100mV30mV(ni)(zhn)ӽ0.5VVLDOݔyɵ1mVp-pVLDOһ(g)_(ki)P(gun)(wn)ĺ(wn)Ϳش_ͼy
@VLDOmҪݔ늉ݔ늉͵늉đ(yng)íh(hun)ڱyʽo(w)(xin)O(sh)ͨ늳عVLDOҲ(yng)(dng)Աo(h)Լܷݔͷݔ늉ēpVLDO(yng)(dng)Ҳ܉c͵ȃr(ji)(lin)迹ֵ(ESR)f(xi)ͬғõԴ{(dio)ʺؓ(f)d{(dio)ʣп˲r(sh)푑(yng)
VLDO)eҊ(jin)D1(b)ʾݔ늉͵LDOֱ1.5Vinṩ1A2A4Ao(w)ƫԴȡ1.5Vݔ_(ki)P(gun)(wn)
@ЩҪΪ(d)ĖŘOƫĶ(jin)O(sh)Ӌ(j)@Щ(xin)Է(wn)ɷքe1.5V1.8Vݔa(chn)Ч1.2V1.5VԴ˿(w)W(wng)j(lu)O(sh)Ӌ(j)Ѓr(ji)FweĽ_(ki)P(gun)DC/DCD(zhun)Qͬr(sh)Ɍ(sh)F(xin)80%ЧʡPower-OK(POK)늏(f)λ(POR)
MVLDOO(sh)Ӌ(j)m(yng)^ֵݔ]ߴr(ji)Ҳ(yng)(dng)ESRֵմM(jn)Ѓ(yu)ݔESR ֵӰ푷(wn)ֵ^С__ֵESRֵʮҪ(du)ڸ(f)srڵ͉O(sh)(ni)VLDOݔؓ(f)d˲r(sh)푑(yng)ݔֵĺ(sh)^ݔֵԽͷֵƫ(dng)ؓ(f)d׃^r(sh)ṩM(jn)˲r(sh)푑(yng)
*_(ki)P(gun)(wn)x
]D(zhun)^(gu)Юa(chn)ğI(y)F(xin)_(ki)ʼҕx(wn)ˡ_(ki)P(gun)(wn)^ߵЧѽ(jng)_(ki)P(gun)(wn)^麆(jin)εľ(xin)Ե͉늉(wn)
_(ki)P(gun)(wn)˷Sݔ늉ݔ늉e^r(sh)(xin)Է(wn)Ч̫͵ȱc(din)õֵ_(ki)P(gun)ʹŴ惦(ch)Ԫ_(ki)P(gun)(wn)Чʿɸ_(d)96%˘OؽD(zhun)^(gu)еĹʓpʧ(dng)_(ki)P(gun)l^ߕr(sh)2MHzⲿБ(yng)ijߴԴȵpС(dng)܉3.3Vr(sh)_(ki)P(gun)(wn)x(dng)1.5VԴҪ1.2VDSP(ni)˹늕r(sh)_(ki)P(gun)(wn)͛](mi)@ă(yu)(sh)(sh)Hϣ_(ki)P(gun)(wn)Á(li)1.5V1.2V?yn)o(w)ȫMOSFET(o(w)ՓƬ(ni)߀Ƭ)_(ki)P(gun)(wn)ȱc(din)ҽ(jng)ͨ^(gu)(yu)O(sh)Ӌ(j)g(sh)(li)˷
*LDOđ(yng)cx
LDOĶN(yng)ãǘ(bio)(zhn)Դ늳ع푪(yng)_(ki)P(gun)D(zhun)Q{(dio)(ji)ݔõ
Ҫf(shu)ǣڹԴһrx늳ݔ늉3.3Vr(sh)D(zhun)QṩߵЧǣ(du)ijЩԴ늉ʹLDO̎Юa(chn)(ni)r(sh)̖(ho)ih(hun)(PLL)(du)κСҪLDO̎ԓֹ늡ԓ^(q)Kһ5mA-30mAˌ(du)wЧʵӰ^С(sh)r(sh)r(sh)(RTC)ĹҲͬýӽݔ늉늉L(zhng)DOtLDOһN䌍(sh)ĺ(jin)ΡͳɱЧʽQڲ 1.8V I/O늉đ(yng)ͨ^(gu)ԓ늉܉PLL-LDOĶʹݔ늉_(d)1.3VЧ_(d)72%
3DC/DCc(yng)
3.1 DC/DC
*(dng)ݔcݔ늉^ߕr(sh)_(ki)P(gun)(wn)_(ki)о(xin)Է(wn)Чʆ(wn)}ͨ^(gu)ʹõ_(ki)P(gun)ʹŴ惦(ch)Ԫ(sh)F(xin)˸_(d)96%Ч˘OؽD(zhun)Q^(gu)еĹʓpʧ
*x_(ki)P(gun)lʸߵDC/DCԘOؿsСⲿ늸ijߴ糬^(gu)2MHzĸ_(ki)P(gun)lʡ
*_(ki)P(gun)(wn)ȱc(din)^СͨúõO(sh)Ӌ(j)g(sh)(li)˷늸lйɔ_^yO(sh)Ӌ(j)(yng)r(sh)(du)EMIҪ]
3.2 DC/DC(Buck)(yng)·O(sh)Ӌ(j)c(yng)LayoutO(sh)Ӌ(j)ɡD2(a)DC/DC(Buck)(yng)·O(sh)Ӌ(j)Dд־(xin)Ǵͨ(yng)xMuRataTayo-yudenTdkAVXƷ|(zh)(yu)ESRX7RX5Rմ
DC/DC(Buck)(yng)LayoutO(sh)Ӌ(j)-PCS](mi)Ӌ(j)Ҫc(din)
Ҫõһ(g)\(yn)(wn)͵ĸl_(ki)P(gun)(wn)ҪСİpcbIJֽY(ji)(gu)е迿DC/DCPCBֳܷɎKDʾͨ·VinVout֮gCinCoutӵغ̣ܶԽ͔_R1R2CFķɷݱ횱ֿVFB_eֱ(lin) 2_CinCoutؓ(f)ˡ3.3 DC/DC(Boost)c(yng)
Boost DC/DCc(din)ġЧDC/DC
*L1ݔdɵݔ˹늣ݔ
*L1늸̫ʹ^(gu)Oֵ糬^(gu)~ֵ늸늸(hu)Ѹ½
*C1һ(g)ˮ(k)(dng)늸늕r(sh)ṩеݔ
*C1xõESR
D2(c)Boost DC/DC(yng)O(sh)Ӌ(j)ʾD
3.3 xԄ(dng)(Buck-Boost)DC/DC(wn)ǰ
-(Buck-Boost)DC/DC(wn)S늳ع늵đ(yng)îa(chn)ƷҪ@N(wn)?yn)x늳ع늵ϵy(tng) VBATTV늉Ҳڑ(yng)õSIPK3.3Vă(ni)߉(dng)Vinڽģʽ(Vout)r(sh)-{(dio)(ji)齵(xin)Է(wn)l(f)]^(gu)(dng)Vin½ijһoֵr(sh)֕(hu)^(gu)ɳɞ(wn)Buck-BoostDC/DC늳؉15-20%
DC/DC(Boost)(yng)ão(w)(xin)IP(pn)(bio)MP3PDADSClcdyʽxx
4Charge Pump(늺ɱ) ^(gu)cx
4.1 Charge PUmp^(gu)
늺ɱõă(ni)?f)Y(ji)(gu)ɡ_(ki)P(gun)·O(sh)lʸ_(ki)P(gun)һ(g)һ(g)`Ŵһ(g)(zhn)Դһ(g)ȡӷ·MɡD3(a)Charge PUmp^(gu)ʾD
ʽ늺ɱͨ^(gu)_(ki)P(gun)кʎ߉·^(sh)F(xin)늉(li)A늺ɱǟo(w)늸еҪⲿ^ߵl˿ʹСմ(1lF)ʹgռСʹóɱ͡늺ɱÃHⲿݼṩ±2ݔ늉pҪ(li)ESR (Ч(lin))̓(ni)_(ki)P(gun)wܵRos(on)늺ɱD(zhun)Qʹ늸ݗEMIԺݔһֻСݞVݔ늉ǹSa(chn)r(sh)õ{(dio)ͨ^(gu)ƬϾ(xin){(dio)(sh)F(xin)ģ늺ɱO(sh)Ӌ(j)r(sh)ɰҪ늺ɱõ_(ki)P(gun)(j)(sh)ʹ{(dio)ṩĻ(dng)g늺ɱʮmڱyʽ(yng)îa(chn)ƷO(sh)Ӌ(j)ʽ늺ɱÃ(ni)Y(ji)(gu)(li)Hһ(g)Ƭϵy(tng)
4.2 Charge Pump(yng)e-C(j)Wķ(wn)늺ɱ(Ҋ(jin)D3(b))
MAXl570С4mmx4mmTQFNbY(ji)˸Чʵl1.5늺ɱú200mVĵ͉(wn)o(w)늸л(zhn)ԓD(zhun)QԄ(dng)11.5늺ɱģʽ֮gГQԱML(zhng)O(sh)늳؉CԒ(hu)PDA͔(sh)aC(j)O(sh)ڶ_(d)93%늳ʹ(ni) 1늺ɱģʽLED(q)(dng)Ч50%LEDԲÔ(sh)ֻPWM̖(ho)M(jn)пMAXl570ƥԣ߀ӿܛ(dng)ԼP(gun)ģʽݔ˺ݔȫ_(ki)늳©늵ԡ
4.3 Charge Pumpx
(xin)Է(wn)͂y(tng)_(ki)P(gun)(wn)dz늱늱õⲿ惦(ch)ԪǸБ(yng)øБ(yng)ͿԱκοܵ늴Ÿɔ_늴Ÿɔ_Ӱ^`lՙC(j){(ln)оƬM늱õĝȱc(din)ݔݔ늉ʺݔ(q)(dng)
͵늺ɱßo(w)늸ⲿ Чͳɱ
5ya(chn)Դ·
CinVȥ(li)ԴCoutݔyͬr(sh)늕r(sh)ṩеݔݔҪqһˮ(k)CBy·ͨڿԴݔˣʹ5-10@(g)(ji)c(din)迹^ʹõй©ؓ(f)d늉 CFṩһ(g)ǰ(fzf)·ɘOc(din)a(chn)ij˜ؓ(f)(fpf)CFͬr(sh)γһ(g)Oc(din)(tpf)һ(g)c(din)
*մxxմͨDZyӮa(chn)Ʒ·O(sh)Ӌ(j)x?yn)r(ji)Ͷҹģʽǔ·֮g^FģʽǶ·L(fng)U(xin)ݔĵЧ(lin)(ESR)(hu)Ӱ䷀(wn)ԣմ^͵ESRŞW(j)ܵؓ(f)d˲׃_](mi)ESRAS늉gESR100W(j)մo(w)OweС SgESRSض׃ܴ(hu)(du)LDO DcDCܮa(chn)Ӱ
6Y(ji)Z(y)
Α(yng)cxñya(chn)ƷԴоƬЩЩɣҪxþ(xin)Է(wn)_(ki)P(gun)(wn)Ҳ̫Ҫ]TأƼsgļsD(zhun)QЧ(ֱӰ늳؉)߀Ќ(du)l(f)ᆖ(wn)}Ŀ]Һî(dng)Ј(chng)жNͬ(li)͵ķ(wn)ɹxҪǸ(j)wO(sh)Ӌ(j)ϵy(tng)ƷҪcl(li)Q
dֻfϢվ^c(din)C(sh)ϢHD(zhun)dՈ(qng)ע̎
һƪ
¼g(sh)ИI(y)l(f)չҪƄ(dng)
ƪya(chn)ƷԴоƬP(gun)I(yng)cx늚ُ(gu)W(wng)(ُ(gu)W(wng))ИI(y)
һƪ
¼g(sh)ИI(y)l(f)չҪƄ(dng)
w
С
M(jn)ӡ(y)
픲
P(gun)]
T(mn)
2011҇(gu)坍Դa(chn)I(y)l(f)չڅ(sh)
Ї(gu)Ya(chn)ؽMُ(gu)څ(sh)
2013꽛(jng)(j){(ln)Ƥ(sh)l(f)(hu)(sh)
(ni)ɹ110kVݔ׃늹O(sh)Ӌ(j)
̙C(j)еИI(y)l(f)չ?fn)r֮F·
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