Datasheet

CD10.482
CD-Series
DC/DC Converter 48V/48V, 5A, 240W
PRELIMINARY
7. HOLD-UP TIME
The input side of the DC/DC converter is equipped with a bulk capacitor which keeps the output voltage alive for a
certain period of time when the input voltage dips or is removed. The bulk capacitor can be discharged by loading the
DC/DC converter on the output side or through a load which is parallel to the input. There is no protection in the
DC/DC converter which prevents current from flowing back to the input terminals. If prevention is needed, an external
diode should be used.
At no load, the hold-up time can be up to several seconds. The green DC-ok lamp is also on during this time.
Hold-up Time Typ. 14ms At 48Vdc input voltage, 48V, 2.5A output, see Fig. 7-1
Min. 11ms At 48Vdc input voltage, 48V, 2.5A output, see Fig. 7-1
Typ. 7.7ms At 48Vdc input voltage, 48V,.5A output, see Fig. 7-1
Min. 6.2ms At 48Vdc input voltage, 48V, 5A output, see Fig. 7-1
Fig. 7-1 Hold-up time vs. input voltage
0
3
9
12
18ms
36 40 44 48 56Vdc
Input Voltage
Hold-up Time
52
(
a
)
(
b
)
(
c
)
(
d
)
6
15
(a) 48V, 2.5A, typ.
(b) 48V, 2.5A, min.
(c) 48V, 5A, typ.
(d) 48V, 5A, min.
Fig. 7-2 Shut-down test setup Fig. 7-3 Shut-down behavior, definitions
Load
+
-
DC/DC
Converter
DC
Source
+
-
Input
Output
+
-
CD10
S1
- 5%
Hold-up Time
Output
Voltage
Intput
Voltage
S1 opens
July 2018 / Rev. 0.1 DS-CD10.482-EN All values are typical figures specified at 48Vdc input voltage 48V, 5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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