0RXC-75TD3X Datasheet, PDF (5/15 Pages) Bel Fuse Inc. – ISOLATED DC/DC CONVERTERS

ISOLATED DC/DC CONVERTERS
48 Vdc Input 3.3 Vdc/15 A, 1.8 Vdc/15 A Dual Outputs
Mar. 24, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Output Trim Equations
Equations for calculating the trim resistor are shown below. The Trim Down resistor should be connected
between the Trim pin and Vout pin. The Trim Up resistor should be connected between the Trim pin and the
GND pin. Only one of the resistors should be used for any given application.
Trim for 3.3V output
module
Vout 1
Trim2
Trim1
GND
Vout 2
Rtrim_ up
module
Vout 1
Trim2
Trim1
GND
Vout 2
Rtr im_down
Vout(%)
Rup (K Ω）
Rdown(K Ω）
10
9
8
7
6
5
4
3
2
1
1.80 3.98 6.70 10.20 14.87 21.40 31.20 47.53 80.20 178.20
2.23 4.94 8.33 12.70 18.51 26.66 38.87 59.23 99.95 222.10
2) Trim for 1.8V output
module
Vout 1
Trim2
Trim1
GND
Vout 2
Rtri m_up
module
Vout 1
Trim2
Trim1
GND
Vout 2
Rtrim _down
Vout(%)
Rup (K Ω）
Rdown(K Ω）
10
9
8
7
6
5
4
3
2
1
0.00 0.72 1.62
2.78
4.33
6.49
9.74 15.14 25.96
58.41
0.00 0.88 1.98 3.40 5.29 7.93 11.90 18.51 31.73 71.39
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com