X7AH-08E Datasheet, PDF (4/7 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS 4.5V-14V Input 0.8V-5.5V/8A Output

NON-ISOLATED DC/DC CONVERTERS
4.5V-14V Input
0.8V-5.5V/8A Output
Output Trim Equations
1) x7AH-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
GND
Rtrim-up
Note: Output voltage Vo=0.9V when Rtrim_up is not connected.
2) x7AH-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}
= ^23.099
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
GND
Rtrim-up
Note: Output voltage Vo=5V when Rtrim_up is not connected.
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