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APE2903G-31 Datasheet(PDF) 4 Page - Advanced Power Electronics Corp. |
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APE2903G-31 Datasheet(HTML) 4 Page - Advanced Power Electronics Corp. |
4 / 7 page Advanced Power Electronics Corp. APE2903 INDUCTOR SELECTION DIODE SELECTION PCB LAYOUT GUIDE 4 Schottky diodes with higher current ratings usually have lower forward voltage drop, larger diode capacitance and fast reverse recovery, it is the ideal choices for APE2903 applications. The forward voltage drop of a Schottky diode represents the conduction losses in the system, while the diode capacitance (CT or CD) represents the switching losses. For diode selection, both forward voltage drop and diode capacitance need to be considered. When laying out the PC board, the following suggestions should be taken to ensure proper operation of the APE2903. These items are also illustrated graphically in below. 1. The power traces, including the GND trace, the SW trace and the VCC trace should be kept short, direct and wide to allow large current flow. Put enough multiply-layer pads when they need to change the trace layer. 2. Do not trace signal line under inductor. A47 µ H inductor is recommended for most APE2903 applications. However, the inductance value is not critical, and the APE2903 will work with inductors in the 33µH to 120µH. |
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