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參數資料
型號: MC33463H-33KT1
廠商: ON SEMICONDUCTOR
元件分類: 穩壓器
英文描述: VARIABLE FREQUENCY MICROPOWER DC-to-DC CONVERTER
中文描述: 0.25 A SWITCHING REGULATOR, 120 kHz SWITCHING FREQ-MAX, PSSO3
封裝: SOT-89, 3 PIN
文件頁數: 11/12頁
文件大小: 164K
代理商: MC33463H-33KT1
MC33463
11
MOTOROLA ANALOG IC DEVICE DATA
Figure 20. Design Equations
Calculation
Step–Down
Step–Up
Flyback
ton
D
f
osc
D
f
osc
D
f
osc
L
ton
(Vin
Vsat
(2IO)
VO)
(n)(Vin)2(ton)
PO
(n)(Vin)2(ton)
PO
IL(avg)
IL(pk)
IO
Iin
Iin
(Vin
Vsat
VO)(ton)
L
(Vin
Vsat)(ton)
L
(Vin
Vsat)(ton)
L
Vripple(pp)
IL
1
16foscCO
2
(ESR)2
1
2
(ton)(IO)
(CO)
(ton)(IO)
(CO)
The following converter design characteristics must be chosen:
Vin – Nominal Operating dc input voltage
VO – Desired dc output voltage
IO – Desired dc output current
Vripple(pp) – Desired peak–to–peak output ripple voltage. For best performance the ripple voltage should be kept to a low value since it will directly
affect line and load regulation. Capacitor CO should be a low equivalent series resistance (ESR) electrolytic designed for switching regulator
applications.
NOTE
: 1.
Vsat – Saturation voltage of the switching transistor.
n – Estimated circuit efficiency.
相關PDF資料
PDF描述
MC33464H-09AT1 MICROPOWER UNDERVOLTAGE SENSING CIRCUITS
MC33464H-09CT1 MICROPOWER UNDERVOLTAGE SENSING CIRCUITS
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相關代理商/技術參數
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