WDD20-03S1U Ver la hoja de datos (PDF) - CHINFA ELECTRONICS
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Lista de partido
WDD20-03S1U Datasheet PDF : 5 Pages
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CIRCUIT SCHEMATIC
WDD20U SERIES
SINGLE & DUAL OUTPUT
‧Block diagram for WDD20U series with single output
Vi +
Vo +
Switching
Device
Rectifier
Vi -
ON / OFF
PWM
Controller
Opto -
Isolation
Reference &
Error Amp.
‧Block diagram for WDD20U series with dual output
Vi +
Switching
Device
Rectifier
Rectifier
Vi -
ON / OFF
PWM
Controller
Opto -
Isolation
Reference &
Error Amp.
Vo -
Trim
Vo +
com
Vo -
Trim
RECOMMENDED CIRCUIT
‧Recommended filter for EN55022 Class B compliance
L1
+
Vin +
Vo +
C1
C2 WDD20U
Vin -
Vo -
-
C3
‧Recommended EN 55022 Class B filter circuit layout.
‧The components used in the above figure, together with the manufacturer
part numbers for these components, are as follows.
C1
C2
C3
WDD20-XXX1U 3.3μF / 50V 3.3μF / 50V InF / 2KV
MLCC
MLCC
MLCC
1μF / 50V 1μF / 50V
WDD20-XXX2U MLCC
MLCC
InF / 2KV
MLCC
WDD20-XXX3U 3.3μF / 100V 3.3μF / 100V InF / 2KV
MLCC
MLCC
MLCC
1μF / 50V
WDD20-XXX4U MLCC
1μF / 50V
MLCC
InF / 2KV
MLCC
WDD20-XXX5U 3.3μF / 100V 3.3μF / 100V InF / 2KV
MLCC
MLCC
MLCC
L1
1.5mH
Common
Choke
1.5mH
Common
Choke
0.5mH
Common
Choke
1.5mH
Common
Choke
0.5mH
Common
Choke
DERATING CURVE
Temperature derating curve
100
12V, 15V & dual
Safe Operating Area
3.3V & 5V
0
-40
61 71
100
Ambient Temperature [ oC ]
www.chinfa.com
2016.05.19
sales@chinfa.com
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