Datasheet

CD5.243
CD-Series
DC/DC Converter 24V, 4A
3. INPUT VOLTAGE
Input voltage nom. DC 12V
Input voltage range 8.4-16.2Vdc full specified, see Fig. 3-2 for derating below 9Vdc
7.2-8.4Vdc maximal 60 seconds or with de-rating see.Fig. 3-2
max. 24.0Vdc absolute maximum continuous input voltage with no
damage to the DC/DC converter
Allowed voltage between input
and earth
max. 60Vdc or
42.2Vac
in case the output voltage is not grounded.
Allowed input ripple voltage
max. 5Vpp 47Hz-40kHz, the momentary input voltage must always
be within the specified limits.
Turn-on voltage typ. 8.7Vdc steady-state value, see Fig. 3-1
Shut-down voltage typ. 7.2Vdc steady-state value, see Fig. 3-1
typ. 17.0Vdc steady-state value, see Fig. 3-1
Input current typ. 9.2A at 12Vdc input and output 24V, 4A, see Fig. 3-4
Start-up delay typ. 450ms see Fig. 3-3
Rise time typ. 80ms 0mF, 24V, constant current load 4A, see Fig. 3-3
typ. 150ms 4mF, 24V, constant current load 4A, see Fig. 3-3
Turn-on overshoot max. 300mV see Fig. 3-3
Input capacitance typ. 3 600μF external capacitors on the input voltage bus are allowed
without any limitations.
Fig. 3-1 Input voltage range
Fig. 3-2 Allowable output current below 9V
input voltage
Turn-on
8.7Vdc
V
IN
P
OUT
Shut-down
16.2Vdc
7.2Vdc 8.4Vdc
Rated input range
17.0Vdc
0
1
2
3
5A
8 9 10 11 12Vdc
Input Voltage
Output Current
(
a
)
(
b
)
4
(a) Ambient < 45°C
(b) Ambient < 60°C
Fig. 3-3 Turn-on behavior, definitions Fig. 3-4 Input current vs. output load
Start-up
delay
Rise
Time
Overshoot
- 5%
Output
Voltage
Input
Voltage
5A11.52 3
0
2
8
14
16A
Output Current
2.5 3.50.5
Input Current, typ
4
12
4.54
6
10
Inpu
t
:
9V
dc
I
n
p
u
t
:
1
2
V
d
c
Oct 2009 / Rev. 1.0 DS-CD5.243-EN
All parameters are specified at 24V, 4A, 12Vdc input voltage, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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