Datasheet

www.recom-power.com
REV.: 11/2019 MED-4
DC/DC Converter
Specifications (measured @ Ta= 25°C, nominal input voltage, full load and after warm-up)
REM6
Series
SAFETY AND CERTIFICATIONS
Certificate Type (Safety) Report / File Number Standard
Medical Electric Equipment, General Requirements for Safety and Essential Perfor-
mance
E314885-A6-CB-1
CAN/CSA-C22.2 No. 60601-1:08
ANSI/AAMI ES60601-1:2005
Medical Electric Equipment, General Requirements for Safety and Essential Perfor-
mance (CB Scheme)
E314885-A6-CB-1
IEC60601-1:2005 + C2:2007 3rd Edition
EN60601-1:2006
EAC RU-AT.49.09571 TP TC 004/2011 TP TC 004/2011
RoHS2+ RoHS-2011/65/EU + AM-2015/863
continued on next page
Thermal Calculation
P
diss
=
P
out set
- P
out set
h
set
P
diss
=
3
- 3 =
0.51W
0.854
Efficiency Factor vs. LoadEfficiency Crosstable (%) @ full Load
Load [%]
Efficiency Factor [ ]
100 20 30 40 50 60 70 80 90 100
0.0
0.2
0.4
0.6
0.8
1.2
1.0
Input Voltage
5 12 24 48 24W 48W
Output Voltage
3.3S
81.5 83.5 83 82.5 83 82.5
05S
86 86 86 86.5 86 86.5
12S
86 89 89 88 89 88
15S
87.5 88.5 89 88.5 89 88.5
24S
87 88.5 88.5 88 88.5 88
05D
84 85 85 85 85 85
12D
86.5 89 88.5 88 88.5 88
15D
87.5 88 88.5 87 88.5 87
T
amb
=
T
case
- T
over
h
set
=
89 x 0.96
85.44%
T
over
=
R
th
x P
diss
T
amb
=
105 - 9.2 =
+95.8°C
T
over
=
18 x 0.51 =
+9.2°C
Practical Example:
T
case
= 105°C
P
out nom.
= 6W
P
out set
= 6 x 0.5 = 3W
R
th
= 18K/W
h
full load
= 89% (Crosstable)
f
h
= 0.96 (Graph)
h
set
=
h
full load
x
f
h
T
case
= baseplate temperature [°C]
T
over
= temperature losses [°C]
T
amb
= ambient temperature [°C]
P
out nom.
= nom. output power [W]
P
out set
= output power set [W]
P
diss
= internal losses [W]
R
th
= thermal impedance [K/W]
h
set
= efficiency set [%]
h
full load
= efficiency @ full load [%]
f
h
= efficiency factor [ ]
Take the REM6-1212D with 12V Input Voltage, 50% load.
What is the maximum ambient operating temperature?