Silicon Laboratories SiM3U1xx Manual de usuario descargar pdf (Pagina 19)

AN726

Rev. 0.1 19

6.2. Alternate Configuration

Figure 20 shows the output network configuration used by the Revision 1.0 hardware. An alternate output network

shown in Figure 21 may provide better performance than the original configuration.

Figure 21. Alternate Class-D Output Network—Direct Drive

For the alternate configuration, the recommended components for the board are shown in Table 5.

Table 5. Class-D ToolStick Alternate Output Network Recommended Components

Reference Value

L ~3.3 µH, 1.5 A

C~2.2µF

~20 pF

~0.47 µF

PB4.0 (R+)

PB4.1 (R-)

FBL

placed as close to the

device as possible

placed as close to the

speaker connectors as

possible

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Silicon Laboratories SiM3U1xx Manual de usuario Pagina 19