Ω) CLASS-T™ DIGITAL AUDIO AMPLIFIER DRIVER …

1 Tripath Technology, Inc. - Technical Information 1 TA2020 TA2020-020 STEREO 20W (4 ) CLASS-T DIGITAL AUDIO AMPLIFIER DRIVER using DIGITAL POWER PROCESSING (DPP ) TECHNOLOGY Technical Information Revision March 2005 GENERAL DESCRIPTION The TA2020-020 is a 20W (4 ) continuous average per channel Class-T DIGITAL AUDIO Power AMPLIFIER IC using 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.

2 APPLICATIONS DVD Players Mini/Micro Component Systems Computer / PC Multimedia Cable Set-Top Products Televisions Battery Powered Systems BENEFITS Fully integrated solution with internal FETs Easier to design-in than Class-D Reduced system cost with minimal heat sink requirement Dramatically improves efficiency versus Class-AB amplifiers Signal fidelity equal to high quality linear amplifiers High dynamic range compatible with DIGITAL media such as CD and DVD, and internet AUDIO FEATURES Class-T architecture Single Supply Operation Audiophile Quality Sound THD+N @ 10W 4 THD+N @12W 4 IHF-IM @ 1W 4 High Power 25W @ 4 , 10% THD+N, VDD= 22W @ 4 , 10% THD+N, VDD= 13W @ 8 , 10% THD+N.

3 VDD= High Efficiency 88% @ 12W 8 81% @ 20W 4 Dynamic Range = 99dB 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 (%)Output Power (W)THD+N versus Output PowerVDD = = 12V/Vf = 1kHzBW = 22Hz - 22kHz1234567891020500mRL= 8 RL= 4 Tripath Technology, Inc. - Technical Information 2 TA2020 ABSOLUTE MAXIMUM RATINGS (Note 1) SYMBOL PARAMETER Value UNITS VDD Supply Voltage 16 V V5 Input Section Supply Voltage V SLEEP SLEEP Input Voltage to V MUTE MUTE Input Voltage to V5+ V ESDHBM ESD Susceptibility, All pins except 2, 30 Human Body Model (Note2)

4 Pins 2, 30 2000 1000 V V ESDMM ESD Susceptibility, Machine Model (Note 3) 200 V TSTORE Storage Temperature Range -40 to 150 C TA Operating Free-air Temperature Range -40 to 85 C TJ Junction Temperature 150 C Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. See the table below for Operating Conditions. Note 2: Human body model, 100pF discharged through a resistor. Note 3: Machine model, 220pF discharged through all pins.

5 OPERATING CONDITIONS (Note 4) SYMBOL PARAMETER MIN. TYP. MAX. UNITS VDD Supply Voltage V VIH High-level Input Voltage (MUTE, SLEEP) V VIL Low-level Input Voltage (MUTE, SLEEP) 1 V Note 4: Recommended Operating Conditions indicate conditions for which the device is functional.

6 See Electrical Characteristics for guaranteed specific performance limits. THERMAL CHARACTERISTICS SYMBOL PARAMETER VALUE UNITS JC Junction-to-case Thermal Resistance C/W JA Junction-to-ambient Thermal Resistance 15 C/W Tripath Technology, Inc.

7 - Technical Information 3 TA2020 ELECTRICAL CHARACTERISTICS (Notes 6, 7) See Test/Application Circuit. Unless otherwise specified, VDD = , f = 1kHz, Measurement Bandwidth = 22kHz, RL = 4 , TA = 25 C. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITSPO Output Power (Continuous Average/Channel) THD+N = RL = 4 RL = 8 THD+N = 10% RL = 4 RL = 8 11 7 18 10 W W W W PO Output Power (VDD= ) (Continuous Average/Channel)

8 THD+N = RL = 4 RL = 8 THD+N = 10% RL = 4 RL = 8 25 W W W W IDD,MUTE Mute Supply Current MUTE = VIH 7 mA IDD, SLEEP Sleep Supply Current SLEEP = VIH 2 mA Iq Quiescent Current VIN = 0 V 64 75 mA THD + N Total Harmonic Distortion Plus Noise PO = 10W/Channel % IHF-IM IHF Intermodulation Distortion 19kHz, 20kHz, 1.

9 1 (IHF) % SNR Signal-to-Noise Ratio A-Weighted, POUT = 20W, RL = 4 99 dB CS Channel Separation 0dBr = 1W, RL = 4 , f = 1 kHz 70 80 dB PSRR Power Supply Rejection Ratio VDD = 9V to Vripple = 100mV, f=1kHz 65 75 65 dB dB Power Efficiency POUT = 12W/Channel, RL = 8 88 % VOFFSET Output Offset Voltage No Load, MUTE = Logic low 50 150 mV VOH High-level output voltage (FAULT & OVERLOADB)

10 V VOL Low-level output voltage (FAULT & OVERLOADB) 1 V eOUT Output Noise Voltage A-Weighted, input AC grounded 100 V Note 6: Minimum and maximum limits are guaranteed but may not be 100% tested.