XRAH-08EXX0 Datasheet, PDF (4/10 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS

NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input
0.8 Vdc - 5.5 Vdc/8 A Output
Output Trim Equations
1) xRAH-08E1A0
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.
R_{trim−down}
= ^1.076
V_o − V_adj
− 5.631
Module
Vout
Trim
Rtrim-down
GND
R_trim−up
= ^3.759
V_adj − V_o
− 0.261
Module
Vout
Trim
Rtrim-up
GND
Note: Output voltage Vo=0.9 V when Rtrim_up is not connected.
2) xRAH-08E500
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.
R_{trim−down}
= ^23.100
V_o − V_adj
− 5.631
Module
Vout
Trim
Rtrim-down
GND
R_trim−up
= ^3.759
V_adj − V_o
− 0.261
Module
Note: Output voltage Vo=5 V when Rtrim_up is not connected.
Vout
Trim
Rtrim-up
GND
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com