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What is the damping factor of the LM4651/52 solution?

April 26, 2017damping Factor lm4651 solution

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What is the damping factor of the LM4651/52 solution?

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Damping factor is the ratio of the output impedance to the load impedance. The higher the factor the better the amplifier can control the movement of the speaker. If the damping factor is too low the bass will not sound “tight”. The output impedance of a class D amplifier also depends on the output filter. Typical values for damping factor for the LM4651/52 chipset are 40 to 100 at 100Hz. The value depends on the DC resistance of the inductors used in the output filter. To improve damping factor the lowest DC resistance inductor possible should be used.