Datasheet

www.recom-power.com
REV.: 1/2019 PB-7
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
RP40Q-RUW
Series
Practical Example:
R
th
=
T
baseplate max
- T
amb
P
diss
R
th
=
T
baseplate max
- T
amb
P
diss
P
diss
=
20
- 20 = 1.98W
0.91
P
diss
=
20
- 20 = 1.98W
0.91
T
amb
= 97.5°C
T
amb
= 100°C
T
baseplate max.
= 110°C
P
out nom.
= 40W
P
out set
= 40 x 0.5 = 20W
R
th
= 6.3K/W (vertical)
h = 91% (Graph)
T
baseplate max.
= 110°C
P
out nom.
= 40W
P
out set
= 40 x 0.5 = 20W
R
th
= 5.0K/W (vertical)
h = 91% (Graph)
Take the RP40Q-11005SRUW with 48V Input Voltage and 50% load, natural convection 0.1m/s, in vertical application.
What is the maximum ambient operating temperature?
Take the RP40Q-11005SRUW-HC with 48V Input Voltage, 50% load, natural convection 0.1m/s, in vertical application and Heat-sink.
What is the maximum ambient operating temperature?
-40 -20 0 20 40 7060-30 -10 10 30 50 80 90 110100
100
80
60
40
90
70
50
30
20
10
0
Output Load [%]
Ambient Temperature [°C]
natural convection 0.1m/s
1m/s
2.5m/s
-40 -20 0 20 40 7060
85
-30 -10 10 30 50 80 90 110100
100
80
60
40
90
70
50
30
20
10
0
Output Load [%]
Ambient Temperature [°C]
natural convection 0.1m/s
1m/s
2.5m/s
Derating Graph
(@ Chamber - tested with double layer PCB: 160x100mm 105µm Eurocard)
Derating Graph
(@ Chamber - tested with double layer PCB: 160x100mm 105µm Eurocard)
6.3 =
110 - T
amb
1.98
5.0 =
110 - T
amb
1.98
SAFETY AND CERTIFICATIONS
Certificate Type (Safety) Report / File Number Standard
Audio/video, information and communication technology equipment.
Safety requirements
LVD1809046-1 +
LVD1903037-1-M1
EN62368-1:2014 + A11:2017
IEC62368-1:2014, 2nd Edition
Railway applications - Electrical equipment used on rolling stock
T181022L06-RL
EN50155:2017
Environmental testing Part 2-1: Tests – Test A: Cold DIN EN60068-2-1:2008-01
Environmental testing Part 2-2: Tests – Test B: Dry heat DIN EN60068-2-2:2008-05
Environmental testing Part 2-30: Tests - Test Db: Damp heat, cyclic DIN EN60068-2-30:2006-06
Railway applications – Rolling stock equipment – Shock and vibration tests EN61373:2010
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