Quick-Start Guide
2. MP3 Player. Move the dial in the upper left corner to the right to select the sine wave.
3. MP3 Player. Increase the volume to 3/4 of maximum. At that volume, the current is approximately 400
mA (sine wave) and the power output approximately1 W.
4. Joystick. Move the joystick down to bring VDD below the AGC inflection point (
<
3.97 V). Notice that
the current draw (~250 mA) and power output (~0.45 W) decrease.
Explanation. This demonstrates the battery tracking feature of the TPA2015D1. When the battery
voltage reaches the AGC threshold, the TPA2015D1 begins to reduce automatically the gain in order
to save battery life and protect the speaker.
5. Joystick. Move the joystick down twice to decrease the battery voltage. The current and power
continue to decrease.
5
SLOU312
–
June 2011
eZAudio TPA2015D1 Demonstration Kit
Copyright
©
2011, Texas Instruments Incorporated