TECHNICAL INFORMATION
B
Stereo 20W (4Ω) Class-T Digital Audio Amplifier using
Ω
Digital Power Processing
TM
Technology
TA2020-020
September, 2000
General Description
The TA2020-020 is a 20W continuous average two-channel Class-T Digital Audio Power
TM
Amplifier IC using Tripath’s proprietary Digital Power Processing technology. Class-T
amplifiers offer both the audio fidelity of Class-AB and the power efficiency of Class-D
amplifiers.
Applications
DVD Players
Mini/Micro Component Systems
Automotive Audio
Computer / PC Multimedia
Cable Set-Top Products
Televisions
Battery Powered Systems
Features
Class-T architecture
Single Supply Operation
“Audiophile” Quality Sound
0.03% THD+N @ 10W 4Ω
0.1% THD+N @12W 4Ω
0.18% IHF-IM @ 1W 4Ω
High Power
13W @ 8Ω, 10% THD+N
23W @ 4Ω, 10% THD+N
38W EIAJ* VDD=14.4V @
4Ω
*saturated square wave output
Benefits
Fully integrated solution with FETs
Easier to design-in than Class-D
Reduced system cost with no heat sink
Dramatically improves efficiency versus
Class-AB
Signal fidelity equal to high quality linear
amplifiers
High dynamic range compatible with
digital media such as CD, DVD, and
internet audio
High Efficiency
88% @ 12W 8Ω
81% @ 20W 4Ω
Dynamic Range = 103 dB
Up to 2
X
25Wrms @ 4Ω, V
DD
=14.6V
Mute and Sleep inputs
Turn-on & turn-off pop suppression
Over-current protection
Over-temperature protection
Bridged outputs
32-pin SSIP package
Typical Performance
THD+N versus Output Power
10
5
2
VDD = 13.5V
Av = 12
f = 1kHz
BW = 22Hz - 22kHz
THD+N (%)
1
0.5
0.2
0.1
0.05
0.02
0.01
500m
1
2
3
4
5 6 7 8 9 10
20
R
L
= 8Ω
R
L
= 4Ω
Output Power (W)
1 of 13
TA2020-020, Rev. 4.0, 09.00
TRIPATH [ TRIPATH TECHNOLOGY INC. ]
