Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
TA0104A
STEREO 500W (4Ω) CLASS-T DIGITAL AUDIO AMPLIFIER
DRIVER USING DIGITAL POWER PROCESSING (DPP
T M
)
TECHNOLOGY
Technical Information
Revision 3.1 – June 2000
GENERAL DESCRIPTION
The TA0104A is a 500W continuous average (4
Ω
), two channel Amplifier Driver
Module which uses Tripath’s proprietary Digital Power Processing (DPP
TM
)
technology. Class-T amplifiers offer both the audio fidelity of Class-AB and the
power efficiency of Class-D amplifiers.
APPLICATIONS
Audio/Video
Amplifiers/Receivers
Pro-audio Amplifiers
Automobile Power Amplifiers
Subwoofer Amplifiers
BENEFITS
Reduced system cost with smaller/less
expensive power supply and heat sink
Signal fidelity equal to high quality Class-AB
amplifiers
High dynamic range compatible with digital
media such as CD and DVD
Features
Class-T architecture
Proprietary Digital Power Processing
technology
Supports wide range of output power levels
“Audiophile” Sound Quality
0.02% THD+N @ 300W, 8Ω
0.02% IHF-IM @ 100W, 8Ω
350W @ 8Ω, 0.1% THD+N,
Vs = +90V
500W @ 4Ω, 0.1% THD+N,
Vs = +90V
High Power
450W @ 8Ω, 1% THD+N,
Vs = +90V
750W @ 4Ω, 1% THD+N,
Vs = +90V
High Efficiency
90% @ 400W @ 8Ω,
Vs = +75V
85% @ 600W @ 4Ω
, Vs = +75V
Dynamic Range = 106 dB
Requires only N-Channel MOSFET output transistors
High power supply rejection ratio
Mute input
Outputs short-circuit protected
Over- and under-voltage protection
Bridgeable, single-ended outputs
38-pin quad package
Supports 100kHz BW of Super Audio CD and DVD-
Audio (Refer to Application Note for specifics)
TYPICAL PERFORMANCE AT +90V
THD+N vs Output Power
10
5
2
1
0.5
20Hz - 22kHz BW
f = 1kHz
BBM = 25nS
V
S
= +/-90V
Av = 200
ST STW38NB20 MOSFET
THD+N (%)
0.2
0.1
0.05
0.02
0.01
0.005
0.002
0.001
1
R
L
= 4Ω
R
L
= 8Ω
2
5
10
20
50
100
200
500
1K
Output Power (W)
1
TA104A – Rev. 3.1/06.00
TRIPATH [ TRIPATH TECHNOLOGY INC. ]
