Integrated Circuits Inc.

aIVR3K Series

Mar 27, 2012

7

PWM DIRECT DRIVE FOR 8 OHM SPEAKER

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.

Note: No additional filter connection is needed for 16

speaker.

VOUT1

VOUT2

8

Speaker

C

1000p ~ 0.01uF

R 5