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ISOLATED DC/DC CONVERTERS
48 Vdc Input 1.2-2.5 Vdc/80 A, 3.3 Vdc/70 A, 5 Vdc/48 A, 12 Vdc/20 A Output
Output Trim Equations
Equations for calculating the trim resistor (in k ? ) are shown below. The Trim Down resistor should be connected
between the Trim pin and Ground pin. The Trim Up resistor should be connected between the Trim pin and the
Vout. Only one of the resistors should be used for any given application.
Rtrimdown =
100
delta
? 2
Vout
1.5 V-12 V:
Rtrimup =
(100 + delta ) ? Vo ? 122 . 5
1 . 225 ? delta
? 2
Module
Trim
GND
Rtrimdown
Rtrimup =
1.2 V:
Notes:
(100 + delta ) ? Vo ? 61 .25
0 . 6125 ? delta
delta = ( Vo _ req ? Vo ) × 100 [ % ]
Vo
? 2
Module
Vout
Trim
GND
Rtrimup
Vo_req=Desired(trimmed) output voltage[V]
Output voltage Vo=3.308 V for 3.3 V output; Vo=5.000 V for 5.0 V; Vo=12.000 V for 12 V output
Efficiency Data
94%
Efficiency Curve
94%
Efficiency Curve
91%
88%
85%
82%
79%
36 V
48 V
75 V
91%
88%
85%
82%
79%
76%
36 V
48 V
75 V
3
5
8
10
13
15
18
20
5
10 15 20 25 30 35 40 45 48
94%
Output Current (A)
0RHB-D0T12x
Efficiency Curve
94%
Output Current (A)
0RHB-D0T05x
Efficiency Curve
91%
88%
85%
82%
79%
76%
36 V
48 V
75 V
91%
88%
85%
82%
79%
76%
73%
36 V
48 V
75 V
10
20
30 40 50
60
70
10
20
30
40
50
60
70
80
Output Current (A)
0RHB-D0T03x
Output Current (A)
0RHB-D0T02x
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ? Tel 201-432-0463 ? Fax 201-432-9542 ? www.belfuse.com
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