Datasheet
32
W
EARM
EARP
OnBoard
Chip
C
EAR
032-016
DigitalPGA
Gain=0dB
AnalogPGA
Gain=0dB
Amp
10.4dB
DAC
5.0Vppdiff
032-017
TPS65950
SWCS032E–OCTOBER 2008–REVISED JANUARY 2011
www.ti.com
6.1.1.2 External Components and Application Schematic
Figure 6-3 is a simplified schematic of the earphone speaker.
Figure 6-3. Earphone Speaker
NOTE
For the component values, see Table 15-1.
6.1.2 8-Ω Stereo Hands-Free
The digital signal from the audio and/or voice interface is fed to two class-D amplifiers. These 8-Ω speaker
amplifiers provide a stereo differential signal on terminal pairs (IHF.RIGHT.P, IHF.RIGHT.M and
IHF.LEFT.P, IHF.LEFT.M).
6.1.2.1 8-Ω Stereo Hands-Free Output Characteristics
Figure 6-4 shows the 8-Ω stereo hands-free amplifier. Table 6-2 lists the output characteristics of the 8-Ω
stereo hands-free amplifier.
Figure 6-4. 8-Ω Stereo Hands-Free Amplifiers
Table 6-2. 8-Ω Stereo Hands-Free Output Characteristics
Parameter Test Conditions Min Typ Max Unit
VBAT voltage 3.0 3.6 4.6 V
Load impedance 6 8 Ω
68 Audio/Voice Module Copyright © 2008–2011, Texas Instruments Incorporated
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