PAM8302A_13 Datasheet, PDF (10/15 Pages) Power Analog Micoelectronics – 2.5W Filterless Class-D Mono Audio Amplifier

PAM8302A
2.5W Filterless Class-D Mono Audio Amplifier
How to Reduce EMI (Electro Magnetic Interference)
A simple solution is to put an additional capacitor 1000μF at power supply terminal for power line coupling
if the traces from amplifier to speakers are short (<20CM).
Most applications require a ferrite bead filter as shown at Figure 1. The ferrite filter depresses EMI of
around 1MHz and higher. When selecting a ferrite bead, choose one with high impedance at high
frequencies and low impedance at low frequencies.
OUT+
Ferrite Bead
OUT-
Ferrite Bead
220pF
220pF
Figure 1: Ferrite Bead Filter to reduce EMI
Power Analog Microelectronics,Inc
www.poweranalog.com
10
09/2011 Rev1.5