AS1341
Datasheet - Application Information
PC Board Layout and Grounding
High switching frequencies and large peak currents make PC board layout an important part of AS1341-based
designs. Good PCB layout can avoid switching noise being introduced into the feedback path, resulting in jitter, insta-
bility, or degraded performance.
- High-power traces (see Figure 22 on page 10) should be as short and wide as possible.
- The current loops formed by the external components (CIN, COUT, L1, and D1 see Figure 22 on page 10) should
be as short as possible to avoid radiated noise. Connect the ground pins of these power components at a com-
mon node in a star-ground configuration.
- Separate noisy traces, such as the LX node, from the feedback network with grounded copper.
- Keep the extra copper on the PCB and integrate it into a pseudo-ground plane.
- When using external feedback, place the resistors as close to pin FB as possible to minimize noise coupling.
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