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PD69220 датащи(PDF) 15 Page - Microchip Technology |
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PD69220 датащи(HTML) 15 Page - Microchip Technology |
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15 / 21 page ![]() Figure 4-5. PD69220 Top-Layer Solder Paste and Vias PCB Layout for Thermal Pad Array Note: The contract manufacturer has latitude to modify the solder paste stencil for manufacturability reasons. The solder paste stencil covers 65% to 80% of the thermal pad and must not allow solder to be applied to the thermal vias under the QFN package using any method they deem appropriate. Any design should be subject to system validation and qualification prior to commitment to mass production of field deployment. Use a 5 mil stencil. The PD69220 may be used on a PCB that was designed for the PD69200, that is the top layer copper for the two devices is identical. However, the recommended solder paste stencil for the PD69220 is different than the recommended stencil for PD69200. The recommended solder paste stencil for the PD69200 is identical to the PD69210 as shown in figure PD69210 Top-Layer Solder Paste and Vias PCB Layout for Thermal Pad Array. For more information, see the PD69200 Datasheet. 4.5 Recommended Solder Reflow Information RoHS 6/6 Pb-free 100% Matte Tin Finish Package Peak Temperature for Solder Reflow (40 s maximum exposure)—260 °C (0 °C, –5 °C) Table 4-4. Classification Reflow Profiles Profile Feature Sn-Pb Eutectic Assembly Pb-Free Assembly Average ramp-up rate (TSmax to Tp) 3 °C/second max 3 °C/second max Preheat Temperature min (TSmin) 100 °C 150 °C Temperature max (TSmax) 150 °C 200 °C Time (tsmin to tsmax) 60 s to 120 s 60 s to 180 s Time Maintained Temperature (TL) 183 °C 217 °C Time (tL) 60 s to 150 s 60 s to 150 s Peak classification temperature (TP) 210 °C to 235 °C 240 °C to 255 °C PD69210/PD69220 Package Information © 2020 Microchip Technology Inc. Datasheet DS00003424A-page 15 |
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