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SRAH-05E250 Datasheet(PDF) 3 Page - Bel Fuse Inc. |
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SRAH-05E250 Datasheet(HTML) 3 Page - Bel Fuse Inc. |
3 / 9 page Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 7.0 Vdc - 13.2 Vdc Input 1.2 Vdc - 3.3 Vdc/5 A Output General Specifications Parameter Min Typ Max Notes Efficiency VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V 88% 86% 84% 82% 80% 91% 89% 87% 85% 83% - - - - - Vin=10 V, full load. Switching Frequency 200 kHz 280 kHz 360 kHz Output Voltage Trim Range 90% - 110% MTBF TBD Calculated Per Bell Core SR-332 (Vin=10 V; Vo=3.3 V; IO =5 A; Ta = 25 °C) Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) 0.78 x 0.7 x 0.32 19.81 x 17.78 x 8.13 Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) 0.7 x 0.308 x 0.65 17.78 x 7.82 x 16.51 Weight - 5 g - Output Trim Equations Equations for calculating the trim resistor given the desired adjusted voltage (Vadj) and the nominal output voltage of the converter (Vo) are shown below. 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. Output Voltage A B C D 3.3 V 17.2 40.2 53.841 61.7 2.5 V 4.496 5.62 9.556 11.24 1.8 V 3.064 10 3.849 13.83 1.5 V 3.712 5.62 3.254 10.26 1.2 V 3.712 5.62 1.87 10.26 Note: Vo=3.304 V for 3.3 V output voltage; Vo=1.805 V for 1.8 V output voltage; Vo=1.501 V for 1.5 V output voltage; Vo=1.203 V for 1.2 V output voltage. Vout Trim GND Rtrim-up Module Vout Trim GND Rtrim-down Module Kohm B Vo adj Vo A up Rtrim ) , ( _ − − = Kohm D adj Vo Vo C down Rtrim ) , ( _ − − = |
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