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ISL8274M bảng dữ liệu(PDF) 35 Page - Renesas Technology Corp

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Giải thích chi tiết về linh kiện  30A/30A Dual-Channel Digital PMBus Step-Down Power Module
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FN8931 Rev.1.00
Page 35 of 81
Jan 4, 2018
ISL8274M
5. Layout Guide
5.6
Reflow Parameters
Due to the low mount height of the HDA, “No-Clean” Type 3 solder paste per ANSI/J-STD-005 is recommended.
A nitrogen purge is also recommended during reflow. A system board reflow profile depends on the thermal mass
of the entire populated board, so it is not practical to define a specific soldering profile just for the HDA. The
profile given in Figure 33 is provided as a guideline, which can be customized for varying manufacturing practices
and applications.
Figure 33. Typical Reflow Profile
0
300
100
150
200
250
350
0
50
100
150
200
250
300
Duration (s)
Slow Ramp (3°C/s Max)
and Soak From +150°C
to +200°C for 60s~180s
Ramp Rate
1.5°C from +70°C to +90°C
Peak Temperature ~+245°C;
Typically 60s-150s Above +217°C
Keep Less than 30s within 5°C of Peak Temp.



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