Datasheet

Applications STA333ML
16/21 Doc ID 13177 Rev 6
Figure 12. Filterless output configuration
The filterless application is more critical in terms of EMI. It is quite important to follow the
below suggestions:
● Tracks from amplifier to speaker should be as short as possible.
● Ferrite beads can be used (instead of coils) to improve EMI performance.
– Ferrite beads must have a low impedance in the audio band and high impedance
at high frequencies.
– Place ferrite beads as close as possible to the IC.
– Ferrite filters must reduce EMI above 1 MHz.
– FCC and CE authorities test radiated emission above 30 MHz.
The presence of snubber networks reduce the EMI. The snubber networks should be placed
as close as possible to the IC.
OUT1A
330 pF
22R
OUT1B
OUT2A
330 pF
22R
OUT2B
Right
Left