XRAH-03HXX0 Datasheet, PDF (3/9 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS

NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 5.0 Vdc/3 A Output
General Specifications
Parameter
Efficiency
VO=5.0 V
VO=3.3 V
VO=2.5 V
VO=1.8 V
VO=1.5 V
Vo=1.2 V
Switching Frequency
Output Trim Range (narrow trim)
MTBF
Dimensions (surface mount)
Inches (L × W × H)
Millimeters (L × W × H)
Dimensions (vertical)
Inches (L × W × H)
Millimeters (L × W × H)
Weight
Min
Typ
Max
89%
87%
85%
82%
80%
78%
200 kHz
90%Vo
92%
90%
88%
85%
83%
81%
300 kHz
-
-
-
-
-
-
400 kHz
110%Vo
8,120,000 hours
0.78 x 0.70 x 0.32
19.81 x 17.78 x 8.13
0.70 x 0.308 x 0.65
17.78 x 7.82 x 16.51
-
5.1 g
-
Notes
Measured at Vin=12 V, full load and
Ta=25 °C
Calculated Per Bell Core SR-332 (IO =
Nominal; Ta = 25 °C)
Control Specifications
Parameter
Min
Typ
Remote On/Off
Signal Low (Unit On)
-0.3 V
-
Signal High (Unit Off)
2.8 V
-
Max
Notes
1V
Remote on/off pin open, unit on.
12 V
Output Trim Equations
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.
Vout
R_trimdown
=^A
V_nom − V_adj
−B
Module
Rtrim-down
Trim
GND
R_trimup
=
V_adj
C
− V_nom
−D
Vnom
5.0
3.3
2.5
1.8
1.5
1.2
A
61.850
53.840
9.556
3.849
3.102
1.794
B
29.400
61.700
15.620
13.830
14.420
10.910
Module
C
11.760
17.200
4.496
3.064
3.536
3.536
Vout
Trim
GND
Rtrim-up
D
14.700
40.200
10.000
10.000
10.000
6.490
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com