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SI7794DP-T1-GE3 Scheda tecnica(PDF) 9 Page - Vishay Siliconix |
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SI7794DP-T1-GE3 Scheda tecnica(HTML) 9 Page - Vishay Siliconix |
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9 / 13 page  www.vishay.com 2 Document Number 71622 28-Feb-06 Vishay Siliconix AN821 PowerPAK SO-8 DUAL The pin arrangement (drain, source, gate pins) and the pin dimensions of the PowerPAK SO-8 dual are the same as standard SO-8 dual devices. Therefore, the PowerPAK device connection pads match directly to those of the SO-8. As in the single-channel package, the only exception is the extended drain connection area. Manufacturers can likewise take immediate advantage of the PowerPAK SO-8 dual devices by mounting them to existing SO-8 dual land patterns. To take the advantage of the dual PowerPAK SO-8’s thermal performance, the minimum recommended land pattern can be found in Application Note 826, Recommended Minimum Pad Patterns With Outline Drawing Access for Vishay Siliconix MOSFETs. Click on the PowerPAK 1212-8 dual in the index of this doc- ument. The gap between the two drain pads is 24 mils. This matches the spacing of the two drain pads on the Pow- erPAK SO-8 dual package. REFLOW SOLDERING Vishay Siliconix surface-mount packages meet solder reflow reliability requirements. Devices are subjected to solder reflow as a test preconditioning and are then reliability-tested using temperature cycle, bias humid- ity, HAST, or pressure pot. The solder reflow tempera- ture profile used, and the temperatures and time duration, are shown in Figures 3 and 4. For the lead (Pb)-free solder profile, see http:// www.vishay.com/doc?73257. Ramp-Up Rate + 6 °C /Second Maximum Temperature at 155 ± 15 °C 120 Seconds Maximum Temperature Above 180 °C 70 - 180 Seconds Maximum Temperature 240 + 5/- 0 °C Time at Maximum Temperature 20 - 40 Seconds Ramp-Down Rate + 6 °C/Second Maximum Figure 3. Solder Reflow Temperature Profile Figure 3. Solder Reflow Temperatures and Time Durations 210 - 220 °C 3 °C(max) 4 °C/s (max) 10 s (max) 183 °C 50 s (max) Reflow Zone 60 s (min) Pre-Heating Zone 3 °C(max) 140 - 170 °C Maximum peak temperature at 240 °C is allowed. |
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