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TPA2008D2PWPRG4 データシート(PDF) 1 Page - Texas Instruments |
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TPA2008D2PWPRG4 データシート(HTML) 1 Page - Texas Instruments |
1 / 24 page www.ti.com FEATURES DESCRIPTION APPLICATIONS PO − Output Power − W 0.01 0.1 1 4 20 0.01 0.1 1 10 f = 20 kHz f = 1 kHz f = 20 Hz VDD = 5 V RL = 3 Ω Gain = 0 dB TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER 0 10 20 30 40 50 60 70 80 90 100 0 0.5 1 1.5 2 2.5 3 3.5 8 Ω Speaker 4 Ω Speaker 3 Ω Speaker VDD = 5 V No Filter PO − Output Power − W EFFICIENCY vs OUTPUT POWER TPA2008D2 SLOS413C – JULY 2003 – REVISED MAY 2004 3-W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL • 3 W Per Channel into 3- Ω Speakers The TPA2008D2 is a third generation 5-V class-D (THD+N = 10%) amplifier from Texas Instruments. Improvements to previous generation devices include: dc volume con- – < 0.045% THD at 1.5 W, 1 kHz, 3- Ω Load trol, lower supply current, lower noise floor, higher • DC Volume Control With 2-dB Steps From efficiency, smaller packaging, and fewer external -38 dB to 20 dB components. Most notably, a new filter-free class-D • Filter Free Modulation Scheme Operates modulation technique allows the TPA2008D2 to di- Without a Large and Expensive LC Output rectly drive the speakers, without needing a low-pass output filter consisting of two inductors and three Filter capacitors per channel. Eliminating this output filter • Extremely Efficient Third Generation 5-V saves approximately 30% in system cost and 75% in Class-D Technology PCB area. – Low Supply Current, 7 mA The improvements and functionality make this device – Low Shutdown Control, 1 µA ideal for LCD projectors, LCD monitors, powered – Low Noise Floor, -80 dBV speakers, and other applications that demand more battery life, reduced board space, and functionality – Maximum Efficiency into 3 Ω, 78% that surpasses currently available class-D devices. – Maximum Efficiency into 8 Ω, 88% A chip-level shutdown control limits total supply – PSRR, -70 dB current to 1 µA, making the device ideal for bat- • Integrated Depop Circuitry tery-powered applications. Protection circuitry in- • Operating Temperature Range, -40 °C to 85°C creases device reliability: thermal and short circuit. Undervoltage shutdown saves battery power for more • Space-Saving, Surface Mount PowerPAD™ essential devices when battery voltage drops to low Package levels. The TPA2008D2 is available in a 24-pin TSSOP PowerPAD™package. • LCD Projectors • LCD Monitors • Powered Speakers • Battery Operated and Space Constrained Systems 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. PRODUCTION DATA information is current as of publication date. Copyright © 2003–2004, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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