Integrated Circuits Inc.
PWM DIRECT DRIVE FOR 8 OHM SPEAKER
aIVR3K Series
When PWM output is selected, the VOUT1 and VOUT2 pins can direct drive a speaker to provide
sound playback. The VOUT1 and VOUT2 are powerful driving pins. To reduce the digital noise
from affecting the VDD and VSS stability, the following filter connection should be applied to the
VOUT1 and VOUT2 pins. The exact filter used is dependent on the sound type and sound volume.
R5
VOUT1
VOUT2
8
Speaker
C
1000p ~ 0.01uF
Note: No additional filter connection is needed for 16
speaker.
7
Mar 27, 2012