Datasheet

CPS20.241-D1
C-Series
24V, 20A, DC/DC CONVERTER
10. LIFETIME EXPECTANCY AND MTBF
DC 110V DC 300V
Lifetime expectancy
*)
169 000h
*)
194 000h
*)
at 24V, 10A and 40°C
478 000h
*)
549 000h
*)
at 24V, 10A and 25°C
81 000h 98 000h at 24V, 20A and 40°C
228 000h
*)
279 000h
*)
at 24V, 20A and 25°C
48 000h 56 000h at 24V, 24A and 40°C
136 000h
*)
158 000h
*)
at 24V, 24A and 25°C
MTBF
**)
SN 29500, IEC 61709 468 000h 537 000h at 24V, 20A and 40°C
770 000h 882 000h at 24V, 20A and 25°C
MTBF
**)
MIL HDBK 217F 254 000h 290 000h at 24V, 20A and 40°C;
Ground Benign GB40
355 000h 395 000h at 24V, 20A and 25°C;
Ground Benign GB25
56 000h 64 000h at 24V, 20A and 40°C;
Ground Fixed GF40
75 000h 86 000h at 24V, 20A and 25°C;
Ground Fixed GF25
*) The Lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by the lifetime
expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours and is calculated according to the
capacitor’s manufacturer specification. The manufacturer of the electrolytic capacitors only guarantees a maximum life of up to 15 years
(131 400h). Any number exceeding this value is a calculated theoretical lifetime which can be used to compare devices.
**) MTBF stands for Mean Time Between Failure, which is calculated according to statistical device failures, and indicates reliability of a
device. It is the statistical representation of the likelihood of a unit to fail and does not necessarily represent the life of a product.
The MTBF figure is a statistical representation of the likelihood of a device to fail. A MTBF figure of e.g. 1 000 000h means that
statistically one unit will fail every 100 hours if 10 000 units are installed in the field. However, it can not be determined if the failed unit
has been running for 50 000h or only for 100h.
11. FUNCTIONAL DIAGRAM
Fig. 11-1 Functional diagram
+
+
-
-
Output
Over-
Voltage
Protection
Boost
Converter
Output
Voltage
Regulator
Power
Converter
Output
Filter
Output
Voltage
Monitor
Output
Power
Manager
Temper-
ature
Shut-
down
Input Fuse
Input Filter
Active Inrush Limiter
Reverse Polarity
Protection
V
OUT
+
-
DC-ok
Contact
DC-ok
LED
Single /
Parallel
DC-ok
Relay
Oct. 2013 / Rev. 1.2 DS-CPS20.241-D1-EN
All parameters are specified at 24V, 20A, 300Vdc, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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