AN726 查看數據表（PDF） - Silicon Laboratories

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AN726

UTILITY CLASS-D TOOLSTICK USER’S GUIDE

Silicon Laboratories 

AN726

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.

placed as close to the

device as possible

PB4.0 (R+) L

C

CB

placed as close to the

speaker connectors as

possible

FB

Cg

PB4.1 (R-) L

C

FB

Cg

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

L

C

Cg

CB

Value

~3.3 µH, 1.5 A

~2.2 µF

~20 pF

~0.47 µF

Rev. 0.1

19

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