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MC33463H-30KT1 数据表(PDF) 11 Page - ON Semiconductor

部件名 MC33463H-30KT1
功能描述  VARIABLE FREQUENCY MICROPOWER DC-to-DC CONVERTER
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

MC33463H-30KT1 数据表(HTML) 11 Page - ON Semiconductor

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MC33463
11
MOTOROLA ANALOG IC DEVICE DATA
Figure 20. Design Equations
Calculation
Step–Down
Step–Up
Flyback
ton
D
fosc
D
fosc
D
fosc
L
t ton
(V
in *
Vsat * VO)
(2I
O
)
t
(n)(V
in
)2(ton)
P
O
t
(n)(V
in
)2(ton)
P
O
IL(avg)
IO
Iin
Iin
IL(pk)
(V
in *
Vsat * VO)(ton)
L
(V
in *
Vsat)(ton)
L
(V
in *
Vsat)(ton)
L
Vripple(pp)
DI
L
1
16foscCO
2
) (ESR)
2
1
2
[
(ton)(IO)
(C
O
)
[
(ton)(IO)
(C
O
)
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.


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