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. Used Substances
- 18. Approvals
- 19. Fulfilled Standards
- 20. Physical Dimensions and Weight
- 21. Accessories
- 22. Application Notes
- 22.1. Peak Current Capability
- 22.2. Back-feeding Loads
- 22.3. Inductive and Capacitive Loads
- 22.4. Charging of Batteries
- 22.5. External Input Protection
- 22.6. Requirements for the Supplying Source
- Parallel Use to Increase Output Power
- 22.8. Parallel Use for Redundancy
- 22.9. Daisy Chaining of Outputs
- Series Operation
- 22.11. Use in a Tightly Sealed Enclosure
- 22.12. Mounting Orientations

CD5.243
CD-Series
DC/DC Converter 24V, 4A
7. EFFICIENCY AND POWER LOSSES
Input 12Vdc
Efficiency typ. 87.7% at 24V, 4A
Power losses typ. 0.7W at no output load
typ. 6.2W at 24V, 2A
typ. 13.5W at 24V, 4A
typ. 17.8W at 24V, 4.8A
Fig. 7-1 Efficiency vs. output current at 24V
output and 12Vdc input voltage, typ.
Fig. 7-2 Losses vs. output current at 24V
output and 12Vdc input voltage, typ.
Efficiency
1
84
86
88
83
89%
4.8
A
23.52.5
85
87
1.5
0.5
3 4
Output Current
Power Losses
012 4.8
A
0
3
9
15
18W
6
3
12
Output Current
4
Fig. 7-3 Efficiency vs. input voltage at 24V,
4A, typ.
Fig. 7-4 Losses vs. input voltage at 24V, 4A,
typ.
Efficiency
910
11
13 14 16Vd
c
90%
85
87
89
88
86
84
12
15
Input Voltage
Power Losses
0
3
6
9
12
15
18W
9 10 121314 16Vd
c
11 15
Input Voltage
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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