Diodes PAM2308 Manual do Utilizador descarregar pdf (Página 12)

PAM2308

Document number: DSxxxxx Rev. 1 - 1

12 of 15

www.diodes.com

January 2013

PAM2308

Product Line o

Diodes Incorporated

Application Information (cont.)

PCB Layout Check List

When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the PAM2308. These items are

also illustrated graphically in Figure 1. Check the following in your layout:

1. The power traces, consisting of the GND trace, the SW trace and the V

trace should be kept short, direct and wide.

2. Does the FB pin connect directly to the feedback resistors? The resistive divider R1/R2 must be connected between the (+) plate of C

OUT

and

ground.

3. Does the (+) plate of C

connect to V

as closely as possible? This capacitor provides the AC current to the internal power MOSFETs.

4. Keep the switching node, SW, away from the sensitive FB node.

5. Keep the (–) plates of C

and C

OUT

as close as possible.

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Figure 1. PAM2308 Suggested Layout

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