NON-ISOLATED DC/DC CONVERTERS
8.3 Vdc - 14 Vdc Input
0.75 Vdc - 5.0 Vdc/10 A Output
Output Trim Equations
Equation for calculating the trim resistor (in ? ) given the desired output voltage (Vo) is shown below. The Rtrim
resistor should be connected between the trim pin and GND.
Vout
R trim = ?
? 1000 ?
? 10500
? Vo ? 0 . 7525
?
?
Module
Sense
trim
Rtrim
GND
Equation for calculating the trim voltage (in V) given the desired output voltage (Vo) is shown below. The Vtrim
voltage should be connected between the trim pin and GND.
Vout
Vtrim = { 0 . 7 ? 0 . 0667 × ( Vo ? 0 . 7525 ) }
Module
Sense
trim
Vtrim
GND
Thermal Derating Curve
Vin=12 V, Vo=3.3 V
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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