Datasheet

www.recom-power.com
REV.: 0/2019 L-3
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin and 15 LEDs (15*3V=45V) unless otherwise stated)
RCDE-48
Series
DROPOUT VOLTAGE
REGULATIONS
Parameter Condition Value
Output Current Accuracy ±7.0% max.
Output Current Stability ±2.0% typ.
Deviation vs. Load
RCDE-48-0.35
7
3.5
0
-3.5
5.25
1.75
-1.75
-5.25
-7
Deviation [%]
0 1 2 3 4 5 6 8 107 9 12
11
1513 14
Output Load [Number of Diodes]
Efficiency vs. Load Dropout Voltage vs. Load
Output Load [Number of Diodes]
3.0
2.0
1.0
2.5
1.5
0.5
0
Dropout Voltage [VDC]
2 3 4 5 7 8 10 12
15
6 9 11 13 14
0 1 2 3 4 5 7 8 10 12 156 9 11 13 14
Output Load [Number of Diodes]
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
RCDE-48-1.05
Dropout voltage is the smallest difference between a regulators input and its
output voltage, which is required to maintain regulation and enable the regulator
to provide rated output voltage or current.
LED++V
in
LED--V
in
V
in
V
out
V
dropout
RCDE-48-xx
V
out max.
= V
in
- V
dropout
V
in min.
= n
LED
x V
F max.
+ V
dropout
V
in min.
=
11 x 3
+ 3
V
in min.
= 36VDC
Example:
V
in
= input voltage
V
out
= output voltage
V
dropout
= dropout voltage
n
LED
= number of LEDs
V
F max.
= forward voltage
V
dropout
= 3VDC max.
n
LED
= 11 LEDs
V
F max.
= 3VDC