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TPA2054D4 데이터시트(PDF) 1 Page - Texas Instruments |
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1 / 30 page 1 FEATURES DESCRIPTION APPLICATIONS FMTuner Codec MP3 8 Speaker Stereo HeadphoneJack Left SE Right SE Left SE Right SE 8 Speaker ABB Mono+ Mono- TPA2054D4 StereoClassD plus DirectPath™ TPA2054D4 www.ti.com ..................................................................................................................................................................................................... SLOS607 – APRIL 2009 1.4 W/CH STEREO CLASS-D AUDIO SUBSYSTEM WITH DirectPath™ HEADPHONE AMPLIFIER AND 3:1 INPUT MUX 23 • Stereo Class-D Amp: – 1.4 W into 8 Ω from 5.0 V (10% THD + N) The TPA2054D4 features a stereo Class-D power amplifier along with a stereo DirectPath™ headphone – 1.25 W into 8 Ω from 5.0 V (1% THD + N) amplifier. The TPA2054D4 has a mono differential • DirectPath™ Stereo Headphone Amplifier input and two stereo single-ended (SE) inputs that – No Output Capacitors Required can be configured as one stereo differential input. Both input channels have a 32-step volume control • Independent Gain Select for Headphone and the DirectPath headphone amplifier has a 4-level Amplifier gain control for coarse volume adjustment. All • Eight Programmable Maximum Headphone amplifiers have output short-circuit and thermal- Voltage Limits overload protection. • Two Single-Ended or One Differential Stereo The Class-D amplifiers deliver 1.25 W into 8 Ω at 1% Input THD from a 5.0 V supply, and 700 mW from 3.6 V. • 3:1 Input MUX with Mode Control The DirectPath headphone amplifier features an output voltage limiter to reduce the maximum output • 32-Step Volume Control for Both Input power to one of seven possible limits. The voltage Channels limiter is programmed through the I2C interface. • Independent Shutdown for Headphone and DirectPath eliminates the need for external DC- Class-D Amplifiers blocking output capacitors to the headphones. The • Short-Circuit and Thermal-Overload Protection built-in charge pump creates a negative supply • ±8 kV HBM ESD Protection on Headphone voltage for the headphone amplifier, allowing a 0-V Outputs DC bias at the output. • I2C™ Interface The DirectPath headphone amplifier gains are +6 dB • 25-Ball 2,61 mm × 2,61 mm WCSP (default), 0 dB, –6 dB, and –14 dB, selected through the I2C interface. This allows the headphone volume to be different from the loudspeaker volume if both are used simultaneously. • Smart Phones / Cellular Phones • Laptop Computers The TPA2054D4 has a 3:1 input MUX for audio source selection. The MUX has mode control which • Portable Gaming directs the input-to-output signal path. Mode and gain • Portable Media Players controls operate from a 1.8 V compatible I2C interface. SIMPLIFIED SYSTEM BLOCK DIAGRAM The voltage supply range for both the Class-D amplifiers and the headphone charge pump is 2.5 V to 5.5 V. The Class-D amplifiers use a combined 7 mA and the headphone amplifier uses 10 mA of typical quiescent current. Total supply current reduces to less than 2 µA. The TPA2054D4YZK is available in a 25-ball 2,61 mm × 2,61 mm WCSP package. 1 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. 2 DirectPath is a trademark of Texas Instruments. 3 I2C is a trademark of NXP Semiconductors. PRODUCTION DATA information is current as of publication date. Copyright © 2009, 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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