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Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
TA0103A Stereo 250W (4Ω) Class-T Digital Audio Amplifier Driver using Digital Power Processing (DPPTM) Technology
Technical Information Revision 3.3 - June 2000
GENERAL DESCRIPTION The TA0103A is a 250W continuous average (4Ω), two channel Amplifier Driver Module which uses Tripath’s proprietary Digital Power Processing (DPPTM) 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 Home/PC Speaker Systems
Benefits
Reduced system cost with smaller/less expensive power supply and heat sink Signal fidelity equal to high quality ClassAB amplifiers High dynamic range compatible with digital media such as CD and DVD
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Features
Class-T architecture Proprietary Digital Power Processing technology Supports wide range of output power levels
“Audiophile” Sound Quality 0.04% THD+N @ 55W, 8Ω 0.03% IHF-IM @ 36W, 8Ω 140W @ 8Ω, 0.1% THD+N, VS = +54V 250W @ 4Ω, 0.1% THD+N, VS = +54V High Power 150W @ 8Ω, 1% THD+N, VS = +54V 300W @ 4Ω, 1% THD+N, VS = +54V High Efficiency 92% @ 155W @ 8Ω, VS = +45V 90% @ 275W @ 4Ω, VS = +45V 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
THD+N versus Output Power
10 5 2 1
20Hz - 22kHz BW f = 1kHz BBM = 65nS Vs = +/-54V Av = 20.75 ST STW38NB20 MOSFET
THD+N (%)
0.5 0.2 0.1
RL= 8Ω
0.05 0.02 0.01 1 2 5 10 20 50 100 200
RL= 4Ω
Output Power (W)
1
TA0103 – Rev 3.3/06.00
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
Absolute Maximum Ratings
SYMBOL Vs V5 VN12 TSTORE TA Positive 5 V Bias Supply Reference Voltage: Nominal +12V referenced to Vsneg Storage Temperature Range Operating Free-air Temperature Range PARAMETER Supply Voltage (Vspos & Vsneg) Value +/-85 6 18 -40 to 150 -20 to +80 UNITS V V V ºC ºC
Notes:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Damage will occur to the device if VN12 is not supplied or falls below the recommended operating voltage when VS is within its recommended operating range.
Operating Conditions
SYMBOL Vs V5 VN12 Positive 5 V Bias Supply Reference Voltage: Nominal +12V referenced to Vsneg PARAMETER Supply Voltage (Vspos & Vsneg) MIN. +/- 35 4.5 10.8 5 12 TYP. MAX. +/- 60 5.5 13.2 UNITS V V V
Note: Recommended Operating Conditions indicate conditions for which the device is functional. See Electrical Characteristics for guaranteed specific performance limits.
Electrical Characteristics
SYMBOL Iq
TA = 25°C. See Notes 1 & 2 for Operating Conditions and Test/Application Circuit .