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TPA321 Arkusz danych(PDF) 1 Page - Texas Instruments |
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TPA321 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 26 page www.ti.com 1 2 3 4 8 7 6 5 SHUTDOWN BYPASS IN+ IN- VO- GND VDD VO+ D OR DGN PACKAGE (TOP VIEW) DESCRIPTION Audio Input Bias Control VDD 350 mW 6 5 7 VO+ VDD 1 2 4 BYPASS IN - VDD/2 CI RI CS 1 µF CB 0.1 µF RF SHUTDOWN VO- 8 GND From System Control 3 IN+ - + - + TPA321 SLOS312C – JUNE 2000 – REVISED JUNE 2004 350-mW MONO AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS • Fully Specified for 3.3-V and 5-V Operation • Wide Power Supply Compatibility 2.5 V – 5.5 V • Output Power for RL = 8 Ω – 350 mW at VDD = 5 V – 250 mW at VDD = 3.3 V • Ultralow Supply Current in Shutdown Mode . . . 0.15 µA • Thermal and Short-Circuit Protection • Surface-Mount Packaging – SOIC – PowerPAD™ MSOP The TPA321 is a bridge-tied load (BTL) audio power amplifier developed especially for low-voltage applications where internal speakers are required. Operating with a 3.3-V supply, the TPA321 can deliver 250 mW of continuous power into a BTL 8- Ω load at less than 1% THD+N throughout voice band frequencies. Although this device is characterized out to 20 kHz, its operation was optimized for narrower band applications such as cellular communications. The BTL configuration eliminates the need for external coupling capacitors on the output in most applications, which is particularly important for small battery-powered equipment. This device features a shutdown mode for power-sensitive applications with a quiescent current of 0.15 µA during shutdown. The TPA321 is available in an 8-pin SOIC surface-mount package and the surface-mount PowerPAD™ MSOP, which reduces board space by 50% and height by 40%. 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 © 2000–2004, 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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