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PCMB065T-R68MS 数据表(PDF) 45 Page - International Rectifier |
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PCMB065T-R68MS 数据表(HTML) 45 Page - International Rectifier |
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45 / 46 page  - 45 - JANURARY 18, 2013 | DATA SHEET | Rev 3.5 45 IR3898 6A Highly Integrated SupIRBuck TM Single-Input Voltage, Synchronous Buck Regulator PD-97662 STENCIL DESIGN Stencils for PQFN can be used with thicknesses of 0.100-0.250mm (0.004-0.010"). Stencils thinner than 0.100mm are unsuitable because they deposit insufficient solder paste to make good solder joints with the ground pad; high reductions sometimes create similar problems. Stencils in the range of 0.125mm-0.200mm (0.005-0.008"), with suitable reductions, give the best results. Evaluations have shown that the best overall performance is achieved using the stencil design shown in following figure. This design is for a stencil thickness of 0.127mm (0.005"). The reduction should be adjusted for stencils of other thicknesses. Figure 52: Stencil Pad Spacing (all dimensions in mm) * Contact International Rectifier to receive an electronic PCB Library file in your preferred format |
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