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SRAH-03H120 Datasheet(PDF) 3 Page - Bel Fuse Inc. |
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SRAH-03H120 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 4.5 Vdc - 32 Vdc Input 1.2 Vdc - 5.0 Vdc/3 A Output General Specifications Parameter Min Typ Max Notes 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 89% 87% 85% 82% 80% 78% 92% 90% 88% 85% 83% 81% - - - - - Measured at Vin=12 V, full load and Ta=25 °C Switching Frequency 200 kHz 300 kHz 400 kHz Output Trim Range (narrow trim) 90%Vo - 110%Vo MTBF 8,120,000 hours Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) 0.78 x 0.70 x 0.32 19.81 x 17.78 x 8.13 Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) 0.70 x 0.308 x 0.65 17.78 x 7.82 x 16.51 Weight - 5.1 g - Control Specifications Parameter Min Typ Max Notes Remote On/Off Signal Low (Unit On) -0.3 V - 1 V Signal High (Unit Off) 2.8 V - 12 V Remote on/off pin open, unit on. 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. B V V A R adj nom trimdown − − = D V V C R nom adj trimup − − = Vnom A B C D 5.0 61.850 29.400 11.760 14.700 3.3 53.840 61.700 17.200 40.200 2.5 9.556 15.620 4.496 10.000 1.8 3.849 13.830 3.064 10.000 1.5 3.102 14.420 3.536 10.000 1.2 1.794 10.910 3.536 6.490 Vout Trim GND Rtrim-down Module Vout Trim GND Rtrim-up Module |
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