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SS26 Datasheet(PDF) 3 Page - C&D Technologies |
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SS26 Datasheet(HTML) 3 Page - C&D Technologies |
3 / 4 page SUPERSIP26 11/99 REV C Page 3 Thermal Design Guide Locate your operating current, read the junction temp rise from the graph and add to your maximum ambient. 135°C is the maximum allowable operating junction tem- perature. Test conditions: Device soldered into 4” x 4” PCB, 2 sided with power and ground planes for heat con- duction. Due to the difficulty in predicting the thermal effects of airflow velocity and direction, and thermal con- duction through ground planes it is important that the SS26 SuperSIPTM be evaluated thermally in each application. For high ambient temperature/high current application please request our Application Note 35-118-01, “Accurate Measurements of SS26 SuperSIPTM Junction Tempera- ture”, for further assistance. Programming To program the SS26 SuperSIPTM for Vout<3.3, connect resistor across pins 8 (TRIM) and 1(Vo). For Vout>3.3, re- sistor is connected across pins 8 and 4 (Gnd). Tj Rise vs. Io (Junction Temp Rise vs. Output Current) OUTPUT CURRENT AMPS Vo=3.3V, Cout-O µf, Vi=5V, Cin=100µf Efficiency 100 95 90 85 80 75 0.5 1.5 2.5 3.5 4.5 5.5 OUTPUT CURRENT - AMPS 70 60 50 40 30 20 10 0 STILL AIR 100LFM 300LFM 3.3V 25C 2.1V 25C Table 2 Vout Resistor Value Vout ResistorValue 1.8 576 Ω 2.8 18.2k 1.9 1.21k 2.9 24.3k 2.0 1.96k 3.0 34.8k 2.1 2.8k 3.1 54.9k 2.2 3.83k 3.2 110.0k 2.3 4.99k 3.3 OPEN 2.4 6.49k 3.4 66.5k 2.5 8.25k 3.5 29.4k 2.6 10.7k 3.6 18.2k 2.7 13.7k Transient Response Operating conditions are as follows: Vin=5V, Vo=3.3V, Load change from Io=0% to Io=100%, TA=25°C, Cin=0F, Co= µF. Operating conditions are as follows: Vin=5V, Vo=3.3V, Load change from Io=100% to Io=0%, TA=25°C, Cin=0F, Co= µF. |
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