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Part Name :

FDD03-15S3U View Datasheet(PDF) - Unspecified

Part NameFDD03-15S3U ETC1
Unspecified 
DescriptionDC - DC CONVERTER 2 ~ 3W SINGLE & DUAL OUTPUT
FDD03-15S3U Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
CIRCUIT SCHEMATIC
Block diagram for FDD03U series with single output
Vi +
Switching
Device
Vi -
Rectifier
Control
Opto -
Isolation
Reference &
Error Amp.
FDD03U SERIES
SINGLE & DUAL OUTPUT
Block diagram for FDD03U series with dual output
Vo + Vi +
Rectifier
Vo +
Switching
Vo -
Device
com
Vi -
Control
Rectifier
Opto -
Isolation
Vo -
Reference &
Error Amp.
RECOMMENDED CIRCUIT
Recommended filter for EN55022 Class B compliance
+
C1
-
SINGLE OUTPUT MODELS
D1
L1
Vin +
Vo +
C2
FDD03U
Vin -
Vo -
C3
DUAL OUTPUT MODELS
+
Vin + Vo +
C1
D1
C2
FDD03U
L1
Vin -
Vo -
-
C4
Note:D1 - Reverse Diode (1A /100V)
The commponents used in the above figure, together with the
manufacturer part numbers for these components, are as follows.
Recommended EN 55022 Class B filter circuit layout.
C1
C2
C3
C4
L1
FDD03- 6.8μF / 100V 4.7μF / 100V lnF/2KV
3mH
Common
U
XXSXU
MLCC
MLCC
MLCC
Choke
FDD03- 6.8μF / 100V 4.7μF / 100V
XXDXU
MLCC
MLCC
lnF/2KV
MLCC
3mH
Common
Choke
DERATING AND EFFICIENCY CURVE
Temperature derating curve
100
NATURAL
CONVECTION
COOLING
0
-40
Ambient Temperature [ oC ] 71
90
Efficiency Vs Input Voltage
FDD03-05S4U
69
68
67
66
65
64
Io : Full Load
63
9 12 15 18 21 24 27 30 33 36
Input Voltage (V)
www.chinfa.com
2010.02.09
Efficiency Vs Output Load
FDD03-05S4U
70
65
60
55
50
45
40
Vi : 24VDC
35
10 20 30 40 50 60 70 80 90 100
Output Load (%)
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[Chinfa Electronics Ind. Co., Ltd.]

FEATURES
‧EFFICIENCY UP TO 79%
‧4:1 & 3:1 & 2:1 WIDE INPUT RANGE
‧I/O ISOLATION
‧SHORT CIRCUIT PROTECTION
‧HIGH PERFORMANCE
‧2 YEARS WARRANTY

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