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TPA0172 датащи(PDF) 1 Page - Texas Instruments |
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TPA0172 датащи(HTML) 1 Page - Texas Instruments |
1 / 31 page TPA0172 2-W STEREO AUDIO POWER AMPLIFIER WITH I2C BUS SLOS327C – AUGUST 2000 – REVISED MAY 2001 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D I2C Bus Controllable D 2-W/Ch Output Power Into 4-Ω Load D Low Supply Current and Shutdown Current D Depop Circuitry D Digital Volume Control From 20 dB to –60 dB D Internal Gain Control, Which Eliminates External Gain-Setting Resistors D Fully Differential Input D Stereo Input MUX D PC-Beep Input D Compatible With PC 99 Desktop Line-Out Into 10-k Ω Load D Compatible With PC 99 Portable Into 8-Ω Load D Surface-Mount Power Packaging 24-Pin TSSOP PowerPAD description The TPA0172 is a stereo audio power amplifier in a 24-pin TSSOP thermally enhanced package capable of delivering 2 W of continuous RMS power per channel into 4- Ω loads. This device utilizes the I2C bus to control its functionality, which minimizes the number of external components needed, simplifies the design, and frees up board space for other features. When driving 1 W into 8- Ω speakers, the TPA0172 has less than 0.2% THD+N from 20 Hz to 20 kHz. Included within this device is integrated depop circuitry that virtually eliminates transients that cause noise in the speakers at power up, power down, and while transitioning in and out of shutdown mode. The overall gain of the amplifier is controlled digitally by the volume control registers which are programmed via the I2C interface. At power up, the amplifier defaults to –60 dB in BTL mode, or –66 dB in SE mode. There are four registers that contain the gains: left BTL, right BTL, left SE, and right SE. Each register contains six bits, which allows 64 gain steps from –60 dB to 20 dB in 1.25-dB steps, and two bits that mute the amplifier. The TPA0172 only consumes 6.5 mA of supply current during normal operation. A shutdown mode is included that reduces supply current to less than 15 µA. The PowerPAD package (PWP) delivers a level of thermal performance that was previously achievable on TO-200-type packages. Thermal impedances of approximately 35 °C/W are truly realized in multilayer PCB applications. This allows the TPA0172 to operate at full power into 8- Ω loads at ambient temperatures of 85°C. AVAILABLE OPTIONS PACKAGED DEVICE TA TSSOP† (PWP) –40 °C to 85°C TPA0172PWP † The PWP package is available taped and reeled. To order a taped and reeled part, add the suffix R to the part number (e.g., TPA0172PWPR). 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. Copyright 2001, 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. 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 GND LOUT+ PC-BEEP ADDRESS0 LIN LLINEIN LHPIN PVDD RIN ADDRESS1 SE/BTL ROUT+ LOUT– SCL SHUTDOWN BYPASS VDD PVDD RLINEIN RHPIN I2CVDD SDA ROUT– GND PWP PACKAGE (TOP VIEW) PowerPAD is a trademark of Texas Instruments. |
Аналогичный номер детали - TPA0172 |
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Аналогичное описание - TPA0172 |
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