AN4569 Datasheet, PDF (19/29 Pages) STMicroelectronics – The purpose of the document is to show different possibilities

AN4569
2.1-channel applications using two devices
3.1.6
Damping network
Figure 17. Schematics for damping network section
The purpose of the damping network is to avoid the high-frequency oscillation issue on the
output circuit. After using the damping network the THD can be improved and the damping
network can also avoid the inductive copper on the PCB routing when the system is working
on high frequency with the PWM or PCM.
The C-R-C is mainly intended for high inductive loads.
The following table shows the recommended values for the components.
Table 4. 2.1 channels, two devices - damping network values
R_load
8Ω
6Ω
4Ω
3Ω
C10S, C11S, C12S,
C13S, C9M, C12M
100 nF
100 nF
220 nF
220 nF
C14S, C15S, C16S,
C17S, C10M, C11M
100 nF
100 nF
220 nF
220 nF
R4S, R5S, R6S, R7S,
R3M, R4M
6.2
4.7
3.3
2.7
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