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TPA2000D4DAPG4 Fiches technique(PDF) 1 Page - Texas Instruments |
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TPA2000D4DAPG4 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 27 page TPA2000D4 STEREO 2W CLASSD AUDIO POWER AMPLIFIER WITH STEREO HP AMPLIFIER SLOS337B − DECEMBER 2000 − REVISED NOVEMBER 2005 1 WWW.TI.COM D Ideal for Notebook PCs and USB-Powered Speakers D 2 W Into 4 Ω From 5-V Supply D Integrated Class-AB Headphone Amplifier D Second-Generation Modulation Technique − Filterless Operation − Improved Efficiency D Low Supply Current ...9 mA typ at 5 V D Shutdown Control ...< 0.05 µA Typ D Shutdown Pin Is TTL Compatible D −40°C to 85°C Operating Temperature Range D Space-Saving, Thermally-Enhanced PowerPAD Packaging description The TPA2000D4 is a 2-W stereo bridge-tied-load (BTL) class-D amplifier designed to drive speakers with as low as 4- Ω impedance. The amplifier uses TI’s second-generation modulation technique, which results in improved efficiency and SNR, and also allows the device to be connected directly to the speaker without the use of the LC output filter commonly associated with class-D amplifiers (this will result in an EMI which must be shielded at the system level). These features make the device ideal for use in notebook PCs where high-efficiency is needed to extend battery run-time. For speakers powered off the USB bus, the high-efficiency allows for higher output power levels without tripping the USB’s overcurrent circuitry. The gain of the amplifier is controlled by two input terminals, GAIN1, and GAIN0. This allows the amplifier to be configured for a gain of 6, 12, 18, and 23.5 dB. The differential input terminals are high-impedance CMOS inputs, and can be used as summing nodes. The headphone amplifier is a stereo single-ended (SE) class-AB amplifier which requires two external resistors per channel to set the gain. The MODE pin selects which amplifier is active; the unused amplifier is placed in shutdown to reduce supply current. Both the class-D BTL amplifier, and the class-AB SE amplifier include depop circuitry to reduce the amount of turnon pop at power up, when cycling SHUTDOWN, and when switching modes of operation. The TPA2000D4 is available in the 32-pin thermally-enhanced TSSOP package (DAP) which allows stereo 2-W continuous output power levels in 4- Ω loads when placed on a board with proper thermal board design. The TPA2000D4 operates over an ambient temperature range of −40 °C to 85°C. These packages deliver levels of thermal performance that were previously only achievable in TO-220-type packages. Thermal impedances of less than 35 °C/W are readily realized in multilayer PCB applications when using the DAP package. Copyright 2000−2005, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPAD is a trademark of Texas Instruments. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 LINN LINP HPLIN GAIN0 GAIN1 PVDDL LOUTP PGNDL PGNDL LOUTN PVDDL HPLGAIN HPLOUT MODE HPRGAIN HPROUT RINN RINP HPRIN BYPASS SHUTDOWN PVDDR ROUTP PGNDR PGNDR ROUTN PVDDR NC VDD COSC ROSC AGND DAP PACKAGE (TOP VIEW) NC − No internal connection |
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