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OutputCapacitorSelection

V
输出

I
输出
C
输出


1
f
s

I
p

L
V
输出

V
d

V
在


I
p

等效串联电阻
I
p
= 顶峰 电流 作 描述 在 这 previous部分 顶峰 电流 控制
L= 选择 inductor 值
I
输出
= 名义上的 加载 电流
f
s
= 切换 频率
V
d
= 整流器 二极管 向前 电压 (典型地 0.3 v)
C
输出
= 选择 输出 电容
等效串联电阻 = 输出 电容 等效串联电阻 值
InputCapacitorSelection
RectifierDiodeSelection
TPS65100
TPS65105
SLVS496B–SEPTEMBER2003–REVISEDMARCH2004
applicationinformation(持续)
table1.inductorselection
deviceinductorvaluecomponentsupplierdimensionsisat/dcr
4.7µhcoilcraftdo1813p-472hc8.89*6.1*5.02.6a/54m
Ω
4.2µhsumidacdrh5d284r25.7*5.7*32.2a/23m
Ω
4.7µhsumidacdc5d234r76*6*2.51.6a/48m
Ω
TPS65100
3.3µhwuerthelektronik7440420034.8*4.8*2.01.8a/65m
Ω
4.2µhsumidacdrh6d124r26.5*6.5*1.51.8a/60m
Ω
3.3µhsumidacdrh6d123r36.5*6.5*1.51.9a/50m
Ω
3.3µhsumidacdph4d193r35.1*5.1*2.01.5a/26m
Ω
3.3µhcoilcraftdo1606t-3326.5*5.2*2.01.4a/120m
Ω
tps651053.3µhsumidacdrh2d18/hp3r33.2*3.2*2.01.45a/69m
Ω
4.7µhwuerthelektronik7440100045.5*3.5*1.01.0a/260m
Ω
3.3µhcoilcraftlpo6610-332m6.6*5.5*1.01.3a/160m
Ω
forthebestoutputvoltagefiltering,alowesroutputcapacitorisrecommended.ceramiccapacitorshavealow
esrvalue,butdependingontheapplication,tantalumcapacitorscanbeusedaswell.a22-µfceramicoutput
capacitorworksformostoftheapplications.highercapacitorvaluescanbeusedtoimprovetheloadtransient
规章制度.seetable2forselectionoftheoutputcapacitor.theoutputvoltageripplecanbecalculatedas:
和:
forgoodinputvoltagefiltering,lowesrceramiccapacitorsarerecommended.a22-µfceramicinputcapacitor
issufficientformostoftheapplications.forbetterinputvoltagefiltering,thisvaluecanbeincreased.看
table2andthetypicalapplicationsforinputcapacitorrecommendations.
table2.inputandoutputcapacitorsselection
CAPACITORVOLTAGERATINGCOMPONENTSUPPLIERCOMMENTS
22µf/121016vtaiyoyudenemk325by226mmc
输出
22µf/12066.3vtaiyoyudenjmk316bj226c
在
toachievehighefficiency,aschottkydiodeshouldbeused.thevoltageratingshouldbehigherthanthe
maximumoutputvoltageoftheconverter.theaverageforwardcurrentshouldbeequaltotheaverageinductor
currentoftheconverter.themainparameterinfluencingtheefficiencyoftheconverteristheforwardvoltageand
thereverseleakagecurrentofthediode;bothshouldbeaslowaspossible.possiblediodesare:在
semiconductormbrm120l,microsemiups120e,andfairchildsemiconductormbrs130l.
14

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www.德州仪器.com OutputCapacitorSelection  V 输出  I 输出 C 输出   1 f s  I p  L V 输出  V d  V 在   I p  等效串联电阻 I p = 顶峰电流作描述在这 previous部分顶峰电流控制 L= 选择 inductor 值 I 输出 = 名义上的加载电流 f s = 切换频率 V d = 整流器二极管向前电压 (典型地 0.3 v) C 输出 = 选择输出电容等效串联电阻 = 输出电容等效串联电阻值 InputCapacitorSelection RectifierDiodeSelection TPS65100 TPS65105 SLVS496B–SEPTEMBER2003–REVISEDMARCH2004 applicationinformation(持续) table1.inductorselection deviceinductorvaluecomponentsupplierdimensionsisat/dcr 4.7µhcoilcraftdo1813p-472hc8.896.15.02.6a/54m Ω 4.2µhsumidacdrh5d284r25.75.732.2a/23m Ω 4.7µhsumidacdc5d234r7662.51.6a/48m Ω TPS65100 3.3µhwuerthelektronik7440420034.84.82.01.8a/65m Ω 4.2µhsumidacdrh6d124r26.56.51.51.8a/60m Ω 3.3µhsumidacdrh6d123r36.56.51.51.9a/50m Ω 3.3µhsumidacdph4d193r35.15.12.01.5a/26m Ω 3.3µhcoilcraftdo1606t-3326.55.22.01.4a/120m Ω tps651053.3µhsumidacdrh2d18/hp3r33.23.22.01.45a/69m Ω 4.7µhwuerthelektronik7440100045.53.51.01.0a/260m Ω 3.3µhcoilcraftlpo6610-332m6.65.51.01.3a/160m Ω forthebestoutputvoltagefiltering,alowesroutputcapacitorisrecommended.ceramiccapacitorshavealow esrvalue,butdependingontheapplication,tantalumcapacitorscanbeusedaswell.a22-µfceramicoutput capacitorworksformostoftheapplications.highercapacitorvaluescanbeusedtoimprovetheloadtransient 规章制度.seetable2forselectionoftheoutputcapacitor.theoutputvoltageripplecanbecalculatedas: 和: forgoodinputvoltagefiltering,lowesrceramiccapacitorsarerecommended.a22-µfceramicinputcapacitor issufficientformostoftheapplications.forbetterinputvoltagefiltering,thisvaluecanbeincreased.看 table2andthetypicalapplicationsforinputcapacitorrecommendations. table2.inputandoutputcapacitorsselection CAPACITORVOLTAGERATINGCOMPONENTSUPPLIERCOMMENTS 22µf/121016vtaiyoyudenemk325by226mmc 输出 22µf/12066.3vtaiyoyudenjmk316bj226c 在 toachievehighefficiency,aschottkydiodeshouldbeused.thevoltageratingshouldbehigherthanthe maximumoutputvoltageoftheconverter.theaverageforwardcurrentshouldbeequaltotheaverageinductor currentoftheconverter.themainparameterinfluencingtheefficiencyoftheconverteristheforwardvoltageand thereverseleakagecurrentofthediode;bothshouldbeaslowaspossible.possiblediodesare:在 semiconductormbrm120l,microsemiups120e,andfairchildsemiconductormbrs130l. 14

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