
A
A
A E
E
E E
E
E 0
0
0 1
1
1 L
L
L 2
2
2 4
4
4 ////L
L
L 4
4
4 8
8
8 D
D
D C
C
C --D
D
D C
C
C C
C
C o
o
o n
n
n v
v
v e
e
e rrrrtttte
e
e rrrrs
s
1
1 8
8
8 --3
3
3 6
6
6 V
V
V d
d
d c
c
c a
a
a n
n
n d
d
d 3
3
3 6
6
6 --7
7
7 2
2
2 V
V
V d
d
d c
c
c IIIIn
n
n p
p
p u
u
u tttt,,,, 1
1
1 0
0
0 W
W
Wa
a
a tttttttt S
S
S iiiin
n
n g
g
g lllle
e
e O
O
O u
u
u ttttp
p
p u
u
u tttt
-18-
Output Characteristics
Minimum Load Requirements
There is 3% minimum load required for the AEE
series modules.
Overcurrent Protection (OCP)
AEE series DC/DC converters feature foldback
current limiting as part of their Overcurrent
Protection (OCP) circuits. When output current
exceeds 110 to 150% of rated current, such as
during a short circuit condition, the output will
shutdown.
Note: If input voltage exceeds 60V, the con-
tinuous shortcircuit may damage the mod-
ule or decrease its life.
When the overcurrent condition is removed, the
converter will automatically restart.
Output Filters
When the load is sensitive to ripple and noise,
an output filter can be added to minimize the
effects. A simple output filter to reduce output
ripple and noise can be made by connecting a
capacitor C3 across the output as shown in
Figure 6. The recommended output capacitor is
100uF/25V aluminum (or tantalum) electrolytic
capacitor.
Extra care should be taken when long leads or
traces are used to provide power to the load.
Long lead lengths increase the chance for
noise to appear on the lines. Under these con-
ditions a capacitor C4 can be added across the
load as shown in Figure 7. The recommended
component for C4 is 1
F ceramic capacitor.
Decoupling
Noise on the power distribution system is not
always created by the converter. High speed
analog or digital loads with dynamic power
demands can cause noise to cross the power
inductor back onto the input lines. Noise can be
reduced by decoupling the load. In most cases,
connecting a 10
F tantalum capacitor in paral-
lel with a 0.1
F ceramic capacitor across the
load will decouple it. The capacitors should be
connected as close to the load as possible.
Output
V
oltage
(v
olts)
AEE00B24
AEE00C24
Fig.5 Overcurrent Foldback
+Vout
-Vout
Load
C3
Fig.6 Output Ripple Filter
+Vout
-Vout
Load
C3
C4
Fig.7 Output Ripple Filter For a Distant
Load
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