Datasheet
Table Of Contents
- 1. Intended Use
- 2. Installation Requirements
- 3. Input Voltage
- 4. Soft-start and Input Inrush Current Surge
- 5. Output
- 6. Hold-up Time
- 7. Efficiency and Power Losses
- 8. Functional Diagram
- 9. Front Side and User Elements
- 10. Terminals and Wiring
- 11. Reliability
- 12. EMC
- 13. Environment
- 14. Protection Features
- 15. Safety Features
- 16. Dielectric Strength
- 17. Approvals
- 18. RoHS, REACH and Other Fulfilled Standards
- 19. Physical Dimensions and Weight
- 20. Accessories
- 21. Application Notes
- 21.1. Peak Current Capability
- 21.2. Back-feeding Loads
- 21.3. Inductive and Capacitive Loads
- 21.4. Charging of Batteries
- 21.5. External Input Protection
- 21.6. Requirements for the Supplying Source
- Parallel Use to Increase Output Power
- 21.8. Parallel Use for Redundancy
- 21.9. Daisy Chaining of Outputs
- Series Operation
- 21.11. Use in a Tightly Sealed Enclosure
- 21.12. Mounting Orientations
CD5.121
CD-Series
DC/DC Converter 12V, 8A
5. 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 voltage variations between 18 to 32.4Vdc
Load regulation max. 120mV static value, 0A Æ 8A
Ripple and noise voltage max. 75mVpp 20Hz to 20MHz, 50Ohm
Output current nom. 9.6A at 12V, ambient < 45°C, see Fig. 5-1
nom. 8A at 12V, ambient < 60°C, see Fig. 5-1
nom. 7.7A at 15V, ambient < 45°C, see Fig. 5-1
nom. 6.4A at 15V, ambient < 60°C, see Fig. 5-1
Output power nom. 115W for ambient temperatures < 45°C
nom. 96W for ambient temperatures < 60°C
Short-circuit current min. 14A continuous current, short circuit impedance 150mOhm
max. 18A continuous current, short circuit impedance 150mOhm
Output capacitance typ. 6 500μF
Fig. 5-1 Output voltage vs. output current at
24Vdc input voltage, typ.
Fig. 5-2 Current limitation vs. input voltage,
(11.5V constant voltage load), typ.
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 milliseconds)
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 causes a voltage dip on the output. Detailed curves can be found in chapter 21.1.
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
Mar. 2016 / Rev. 1.5 DS-CD5.121-EN
All parameters are specified at 12V, 8A, 24Vdc input voltage, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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