ISOLATED DC/DC CONVERTERS
48 Vdc Input, 3.3 Vdc/2 A, 5 Vdc/2 A, 12 Vdc/1 A, 24 Vdc/0.5 A Output
Output Trim Equations
Equations for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) and the nominal
output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between
the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of
the resistors should be used for any given application.
Vout
Rtrimdown
A
Module
Trim
RTrimDown
=
− B
Vnom −Vadj
GND
Vout
Trim
C
RTrimUp
=
− D
Module
Vadj −Vnom
Rtrimup
GND
Vnom
A
B
C
D
24
12
5.0
3.3
489.490
113.550
56.410
21.628
28.310
16.990
51.200
75.400
26.660
13.020
18.228
13.020
6.810
6.490
36.500
64.900
Efficiency Data
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
90.00%
85.00%
80.00%
75.00%
70.00%
65.00%
60.00%
55.00%
50.00%
0.00
36V
48V
75V
36V
48V
75V
0.50
1.00
1.50
2.00
0.20
0.50
1.00
1.50
2.00
OUTPUT CURRENT(A)
OUTPUT CURRENT (A)
0RLC-10T033
0RLC-10T050
90.00%
85.00%
80.00%
75.00%
70.00%
65.00%
60.00%
55.00%
50.00%
0.05
90.00%
85.00%
80.00%
75.00%
70.00%
65.00%
60.00%
55.00%
50.00%
36V
48V
75V
36V
48V
75V
0.00 0.20 0.40 0.60 0.80 1.00
OUTPUT CURRENT (A)
0.13
0.25
0.38
0.50
OUTPUT CURRENT (A)
0RLC-10T120
0RLC-10T240
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com