TA2020-020 Datasheet, PDF (1/13 Pages) Tripath Technology Inc. – Stereo 20W (4Ω) Class-T Digital Audio Amplifier using Digital Power Processing Technology

B ^{T E C H N I C A L I N F O R M A T I O N}
Stereo 20W (4Ω) Class-T Digital Audio Amplifier using
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
Amplifier IC using Tripath’s proprietary Digital Power Processing^TM technology. Class-T
amplifiers offer both the audio fidelity of Class-AB and the power efficiency of Class-D
amplifiers.
Applications
¾DVD Players
¾Mini/Micro Component Systems
¾Automotive Audio
¾Computer / PC Multimedia
¾Cable Set-Top Products
¾Televisions
¾Battery Powered Systems
Benefits
¾Fully integrated solution with FETs
¾ Easier to design-in than Class-D
¾ Reduced system cost with no heat sink
¾Dramatically improves efficiency versus
Class-AB
¾Signal fidelity equal to high quality linear
amplifiers
¾High dynamic range compatible with
digital media such as CD, DVD, and
internet audio
Typical Performance
Features
¾Class-T architecture
¾Single Supply Operation
¾“Audiophile” Quality Sound
¾0.03% THD+N @ 10W 4Ω
¾0.1% THD+N @12W 4Ω
¾0.18% IHF-IM @ 1W 4Ω
¾High Power
¾13W @ 8Ω, 10% THD+N
¾23W @ 4Ω, 10% THD+N
¾38W EIAJ* VDD=14.4V @ 4Ω
*saturated square wave output
¾High Efficiency
¾88% @ 12W 8Ω
¾81% @ 20W 4Ω
¾Dynamic Range = 103 dB
¾Up to 2X25Wrms @ 4Ω, VDD=14.6V
¾Mute and Sleep inputs
¾Turn-on & turn-off pop suppression
¾Over-current protection
¾Over-temperature protection
¾Bridged outputs
¾32-pin SSIP package
THD+N versus Output Power
10
5
VDD = 13.5V
Av = 12
f = 1kHz
2 ^{BW = 22Hz - 22kHz}
1
0.5
0.2
0.1
R_L= 8Ω
R_L= 4Ω
0.05
0.02
0.01
500m
1
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2
3 4 5 6 7 8 9 10
20
Output Power (W)
TA2020-020, Rev. 4.0, 09.00