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TPA0162 Datasheet(PDF) 1 Page - Texas Instruments |
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TPA0162 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 29 page TPA0162 2-W STEREO AUDIO POWER AMPLIFIER WITH DIGITAL VOLUME CONTROL SLOS249B – JUNE 1999 – REVISED MARCH 2000 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Compatible With PC 99 Desktop Line-Out Into 10-k Ω Load D Compatible With PC 99 Portable Into 8-Ω Load D Internal Gain Control, Which Eliminates External Gain-Setting Resistors D Digital Volume Control From 20 dB to –40 dB D 2-W/Ch Output Power Into 3-Ω Load D PC-Beep Input D Depop Circuitry D Stereo Input MUX D Fully Differential Input D Low Supply Current and Shutdown Current D Surface-Mount Power Packaging 24-Pin TSSOP PowerPAD ™ description The TPA0162 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 3- Ω loads. This device minimizes the number of external components needed, which simplifies the design and frees up board space for other features. When driving 1 W into 8- Ω speakers, the TPA0162 has less than 0.22% THD+N across its specified frequency range. Included within this device is integrated depop circuitry that virtually eliminates transients that cause noise in the speakers. The overall gain of the amplifier is controlled digitally by the UP and DOWN terminals. At power up, the gain is set at the lowest level, –85 dB. It can then be adjusted to any of 31 discrete steps by pulling the voltage down at the desired pin to logic low. The gain is adjusted in the initial stage of the amplifier as opposed to the power output stage. As a result, the THD changes very little over all volume levels. An internal input MUX allows two sets of stereo inputs to the amplifier. In notebook applications, where internal speakers are driven as BTL and the line outputs (often headphone drive) are required to be SE, the TPA0162 automatically switches into SE mode when the SE/BTL input is activated. This effectively reduces the gain by 6 dB. The TPA0162 consumes only 20 mA of supply current during normal operation. A miserly shutdown mode is included that reduces the supply current to less than 150 µA. The PowerPAD package (PWP) delivers a level of thermal performance that was previously achievable only in TO-220-type packages. Thermal impedances of approximately 35 °C/W are truly realized in multilayer PCB applications. This allows the TPA0162 to operate at full power into 8- Ω loads at ambient temperatures of 85°C. 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 © 2000, 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 UP DOWN LOUT+ LLINEIN LHPIN PVDD RIN LOUT– LIN BYPASS GND GND RLINEIN SHUTDOWN ROUT+ RHPIN VDD PVDD CLK ROUT– SE/BTL PC-BEEP GND PWP PACKAGE (TOP VIEW) PowerPAD is a trademark of Texas Instruments Incorporated. |
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