Tri path Technol og y, I nc. - Techni cal I nformation
TYPICAL PERFORMANCE
Channel Separation
+0
T
T
T
T
T
T
T
T
Frequency Response
+3
+2.5
+2
+1.5
VD D = 12V
P
O
= 1W
-10
-20
-30
VD D = 12V
R
L
= 8
Ω
P
O
= 1W
BW = 22Hz - 22kHz
R
L
= 16
Ω
R
L
= 8
Ω
R
L
= 6
Ω
+1
-40
d
B
r
-50
-60
-70
-80
-90
-100
-110
20
d
B
r
+0.5
+0
-0.5
-1
-1.5
-2
-2.5
-3
20
50
100
200
500
Hz
1k
2k
5k
10k
20k
50
100
200
500
Hz
1k
2k
5k
10k
20k
APPLICATION INFORMATION
Layout Recommendations
The TAA2008 is a power (high current) amplifier that operates at relatively high switching
frequencies. The outputs of the amplifier switch between the supply voltage and ground, at high
speeds, while driving high currents. This high-frequency digital signal is passed through an LC
low-pass filter to recover the amplified audio signal. Since the amplifier must drive the inductive
LC output filter and speaker loads, the amplifier outputs can be pulled above the supply voltage
and below ground by the energy in the output inductance. To avoid subjecting the TAA2008 to
potentially damaging voltage stress, it is critical to have a good printed circuit board layout. It is
recommended that Tripath’s layout and application circuit be used for all applications and only be
deviated from after careful analysis of the effects of any changes. Please contact Tripath
Technology for further information regarding reference design material regarding the TAA2008.
Output Stage layout Considerations and Component Selection Criteria
Proper PCB layout and component selection is a major step in designing a reliable TAA2008
power amplifier. The supply pins require proper decoupling with correctly chosen components to
achieve optimal performance and reliability.
The output pins need proper protection to keep the outputs from going below ground and above
VDD.
9
TAA2008 –KLi/1.0/05.06
TRIPATH [ TRIPATH TECHNOLOGY INC. ]
