Datasheet

YR20.246
Y-Series
24-28V, 20A, DUAL REDUNDANCY MODULE
4. POWER LOSSES
Power losses typ.
2.6-4.7W
at 2x5A, 25°C ambient temperature
typ.
5.6-8.7W
at 2x10A, 25°C ambient temperature
Standby power losses typ. 1.7W at no output current
Fig. 4-1 Power losses Fig. 4-2 Test setup for power loss measurements
Output
V
A
Power
Supply
24V, 12A
+
-
V
A
I 1
I 2
U 1
U 2
A
V
I OUT
U OUT
I 1 I 2 = U 2 U 1 =Losses U 1 = U OUT -
*
I 1 +)(
*
U 2
*
I 2 I OUT
Variable
Load,
0-24A
YR20.246
Input 1
Input 2
Output
Power
Supply
24V, 12A
+
-
Power Losses, typ
0
5A 15A
2W
4W
6W
8W
10W
20A10A
Output:
2x5A2x2.5A
Input:
2x10A2x7.5A
0
0
12W
25A
2x12.5A
Input / Output Current
Depending on
Load Share
Regulation
25°C
60°C
25/
60°C
5. LIFETIME EXPECTANCY AND MTBF
The redundancy module has two input channels which are completely independent from each other. Each control
circuit, auxiliary voltage source, or other circuitry in the module are designed separately for each input. The dual input
redundancy module can be considered as two single redundancy modules combined together in one housing. The only
common point is the circuit trace that ties the two separate circuits together at the output.
The MTBF figures below are for the entire dual input module. If the MTBF number of only one path is needed, simply
double the value from the table.
Input / output current
conditions
Input: 2x5A
Output: 10A
Input: 2x10A
Output: 20A
Lifetime expectancy
*)
372 000h
*)
182 000h
*)
at 24V and 40°C
1 053 000h
*)
516 000h
*)
at 24V and 25°C
MTBF
**)
SN 29500, IEC 61709 2 306 000h 1 954 000h at 24V and 40°C
3 913 000h 3 359 000h at 24V and 25°C
MTBF
**)
MIL HDBK 217F 964 000h 858 000h Ground Fixed GF40 (24V and 40°C)
1 379 000h 1 226 000h Ground Fixed GF25 (24V and 25°C)
278 000h 243 000h Ground Benign GB40 (24V and 40°C)
381 000h 330 000h Ground Benign GB25 (24V and 25°C)
*) 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.
Jul. 2017 / Rev. 1.4 DS-YR20.246-EN All parameters are typical values specified at 24V, 20A output current, 25°C ambient and
after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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