User manual

CD5.121
CD–Series
DC/DC Converter; 12V, 8A
Jan. 08 / Rev. 1.1 DS-CD5.121-EN / All parameters are specified at 12V, 8A and 24Vdc input at 25°C ambient unless otherwise noted.
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7. OUTPUT
Output voltage
nom. 12V
Adjustment range
min. 12-15V Guaranteed
max. 16.1V At clockwise end position of potentiometer
Factory setting
12.0V
±0.2%, at full load, cold unit
Line regulation
max. 25mV Input variations between 18 to 32.4Vdc
Load regulation max. 120mV Static value, 0A Æ 8A Æ 0A
Ripple and noise voltage
max. 75mVpp 20Hz to 20MHz, 50Ohm
Output capacitance typ. 6500µF
Output current nom. 9.6A At 12V, ambient < 45°C, see Fig. 7-1
nom. 8A
At 12V, ambient < 60°C, see
Fig. 7-1
nom. 7.7A At 15V, ambient < 45°C, see Fig. 7-1
nom. 6.4A
At 15V, ambient < 60°C, see
Fig. 7-1
Output power nom. 115W Ambient < 45°C
nom. 96W
Ambient < 60°C
Short-circuit current
min. 14A Load impedance 150mOhm, see Fig. 7-1
max. 18A Load impedance 150mOhm, see Fig. 7-1
Fig. 7-1 Output voltage vs. output current,
typ. (24Vdc input voltage)
Fig. 7-2 Current limitation vs. input voltage,
typ. (11.5V constant voltage load)
Output Voltage
0
068
3
6
9
18V
12
15
18
A
16102 4 12 14
Adjustment
Range
Output Current
Output Current
9.8
15 21 27
10.0
10.2
11A
10.6
10.8
33Vd
c
302418
10.4
Input Voltage
Peak current capability (up to several ms)
The DC/DC converter can deliver a peak current which is higher than the specified short term current. This helps to
start current demanding loads or to safely operate subsequent circuit breakers.
The extra current is supplied by the output capacitors inside the DC/DC converter. During this event, the capacitors
will be discharged and cause a voltage dip on the output. Detailed curves can be found in chapter 25.1.
Peak current voltage dips typ. from 12V to 8.3V At 16A for 50ms, resistive load
typ. from 12V to 6.2V
At 40A for 2ms, resistive load
typ. from 12V to 4.3V
At 40A for 5ms, resistive load