Datasheet

DC/DC Converter
MED-3
REV.: 0/2015www.recom-international.com
Specifications (measured at T
A
= 25°C, nominal input voltage, full load and after warm-up)
REM3
Series
PROTECTIONS
Parameter Condition Type Value
Short Circuit Protection (SCP) continuous, auto-recovery
Over Load Protection (OLP) % of Iout rated Hiccup mode, 150% typ.
Output Over Voltage Protection (OVP)
Single 3.3Vout
5Vout
12Vout
15Vout
24Vout
Dual 5Vout
12Vout
15Vout
3.7VDC min. / 5VDC max.
5.6VDC / 7VDC max.
13.5VDC min. / 16VDC max.
18.3VDC min. / 22VDC max.
29.1VDC min. / 34.5VDC max.
5.6VDC min. / 7VDC max.
13.5VDC min. / 18.2VDC max.
17VDC min. / 22VDC max.
Isolation Voltage
(2MOPP insulation)
I/P to O/P
working voltage
5kVAC / 1 minute
250VAC / continuous
Leakage Current 240VAC, 60Hz 2µA
Clearance
Creepage
I/P to O/P
I/P to O/P
8mm
8mm
Isolation Capacitance 12pF typ. / 17pF max.
REGULATIONS
Parameter Condition Type Value
Output Voltage Accuracy ±1%
Voltage Adjustability
Single
Dual
3.3, 5, 12Vout
15, 24Vout
±10%
±10% min. / ±20% max.
±10%
Line Voltage Regulation LL to HL Single
LL to HL Dual
±0.2%
±0.5%
Load Voltage Regulation
no load to full load Single
no load to full load Dual
±0.2%
±1%
Cross Regulation asymmetrical load 25% / Full Load only Dual Output ±5%
Transient Response 25% load step change 250µs
Calculation Example:
choose your model:
REM3-1212D
 •EfciencyfromTable1(=87.5%@maxLoad/nomVin)
 •Loadingconditionsinapplication(e.g.50%)
 •useEfffactorfromGraph1(=0.98@50%)
Calculation:
Vin = 12V
Iout = 50%
Eff
100%
= 87.5%
Eff
factor50%
= 0.98
R
th
= 18°C/W
T
CASEmax
= 105°C
T
AMBmax
= T
CASEmax
- T
OVER
= 105 - 4.5 = 100.5°C
T
OVER
= R
th
* P
DIS50%
= 18 * 0.25 = 4.5°C
P
DIS50%
= P
in50%
- P
out50%
=
P
out100%
* 0.5
- (P
out100%
* 0.5) = 1.75 - 1.5 = 0.25W
Eff
50%
Eff
50%
= Eff
100%
* Eff
factor50%
= 87.5 * 0.98 = 85.75%
10 20 30 40 50 60 70 80 90 100
Load (%)
Efficiency (%)
50
60
70
80
90
100