QS5.241-60 Datasheet, PDF (10/27 Pages) PULS GmbH – 24V, 100W, DC/DC CONVERTER

Q-Series
QS5.241-60
24V, 100W, DC/DC CONVERTER
9. EFFICIENCY AND POWER LOSSES
Efficiency
typ.
91.1%
at 110Vdc input and 24V, 4.2A
Average efficiency^*)
typ.
88.9%
25% at 1.05A, 25% at 2.1A,
25% at 3.15A. 25% at 4.2A
Power losses
typ.
4.0W
at 110Vdc input and 24V, 0A
typ.
6.5W
at 110Vdc input and 24V, 2.1A (= 50% load)
typ.
9.8W
at 110Vdc input and 24V, 4.2A
*) The average efficiency is an assumption for a typical application where the DC/DC converter is loaded with 25% of the nominal load for
25% of the time, 50% of the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time and with
100% of the nominal load for the rest of the time.
Fig. 9-1 Efficiency vs. output current, at 24V,
typ.
Efficiency
92%
91
90
89
88
87
86
85
Output Current
84
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5A
Fig. 9-2 Losses vs. output current, at 24V, typ.
Power Losses
12W
10
8
6
4
2
Output Current
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5A
10. LIFETIME EXPECTANCY AND MTBF
Lifetime expectancy^*)
196 000h^*)
at 24V, 2.1A and 40°C
535 000h^*)
at 24V, 2.1A and 25°C
127 000h^*)
at 24V, 4.2A and 40°C
360 000h^*)
at 24V, 4.2A and 25°C
MTBF^**) SN 29500, IEC 61709
956 000h
at 24V, 4.2A and 40°C
1 619 000h
at 24V, 4.2A and 25°C
MTBF^**) MIL HDBK 217F
382 000h
at 24V, 4.2A and 40°C, Ground Benign GB40
515 000h
at 24V, 4.2A and 25°C, Ground Benign GB25
87 000h
at 24V, 4.2A and 40°C, Ground Fixed GF40
115 000h
at 24V, 4.2A 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.
Aug. 2016 / Rev. 1.0 DS-QS5.241-60-EN
All parameters are specified at 24V, 4.2A, 110Vdc, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
10/27