Puls CD Series - Hold-Up Time

CD10.241
CD-Series
DC/DC Converter 24V/24V, 10A, 240W
Sep. 2019 / Rev. 1.4 DS-CD10.241-EN All values are typical figures specified at 24Vdc input voltage 24V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany
9/27
7. H
OLD
-
UP
T
IME
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. 8ms At 24Vdc input voltage, 24V, 5A output, see Fig. 7-1
Min.. 6.5ms At 24Vdc input voltage, 24V, 5A output, see Fig. 7-1
Typ. 4ms At 24Vdc input voltage, 24V, 10A output, see Fig. 7-1
Min.. 3.2ms At 24Vdc input voltage, 24V, 10A output, see Fig. 7-1
Fig. 7-1 Hold-up time vs. input voltage
0
2
4
6
8ms
18 20 22 24 28Vdc
Input Voltage
Hold-up Time
(a) 24V, 5A, typ.
(b) 24V, 5A, min.
(c) 24V, 10A, typ.
(d) 24V, 10A, min.
26
(a)
(b)
(c)
(d)
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