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NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input
General Specifications
0.75 Vdc - 5.0 Vdc/3 A Output
Parameter
Min
Typ
Max
Notes
Efficiency
Vo=5.0 V
Vo=3.3 V
Vo=0.75 V
Switching Frequency
Output Voltage Trim Range
(Wide Trim)
MTBF
90%
88%
77%
200 kHz
0.7525 V
93%
91%
80%
230 kHz
-
6,350,000 hours
-
-
-
250 kHz
5V
Measured at Vin=12 V, full load
Calculated Per Bell Core SR-332 (I O =
80% load; T a = 25 ° C)
Dimensions (Surface Mount)
Inches (L × W × H)
Millimeters (L × W × H)
0.8 x 0.45 x 0.251
20.32 x 11.42 x 6.38
Weight
-
2.5 g
-
Note : All specifications are typical at 25 ° C unless otherwise stated.
Control Specifications
Parameter
Min
Typ
Max
Notes
Remote On/Off
Signal Low (Unit Off)
-0.3 V
-
0.4 V
Signal High (Unit On)
Signal Low (Unit On)
Signal High (Unit Off)
2.5 V
-0.3 V
2.5 V
-
-
-
14 V
0.4 V
14 V
Remote On/Off pin open, Unit on.
Output Trim Equations
Equation for calculating the trim resistor (in k ? ) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up resistor should be connected between the Trim pin and Ground.
Vout
R trim =
10 . 507
V adj ? 0 . 7525
? 1
Module Trim
Rtrim
GND
Equation for calculating the trim voltage (in V) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up voltage should be connected between the Trim pin and Ground.
Vout
V trim = 0 . 7 ? 0 . 0667 × ( V adj ? 0 . 7525 )
Module
Trim
Vtrim
GND
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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