TAS5708PHPR ,20-W Stereo Closed-Loop I2S Audio Power Amplifier with Speaker EQ and DRC 48-HTQFP 0 to 85 ....... SLOS570–DECEMBER 2008FUNCTIONAL VIEWLOUT_A7 BQ2´ HBth FET OutV4OUT_BSerialOOrderSDIN Audio ..
TAS5709 ,20-W Stereo I2S Audio Amplifier with Speaker EQ and 2-Band DRCFeatureswith a PWM carrier between a 384-kHz switching rate– Serial Control Interface Operational W ..
TAS5709APHP ,20-W Stereo I2S Audio Amplifier with Speaker EQ and 2-Band DRC 48-HTQFP 0 to 85Featureswith a PWM carrier between a 384-kHz switching rate– Serial Control Interface Operational W ..
TAS5709PHP ,20-W Stereo I2S Audio Amplifier with Speaker EQ and 2-Band DRC 48-HTQFP 0 to 85FEATURES• Audio Input/Output – DRC: Dynamic Range Compression. CanBe Used As Power Limiter. Enables ..
TAS5709PHPR ,20-W Stereo I2S Audio Amplifier with Speaker EQ and 2-Band DRC 48-HTQFP 0 to 85These devices have limited built-in ESD protection. The leads should be shorted together or the dev ..
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TAS5708-TAS5708PHP-TAS5708PHPR
20-W Stereo Closed-Loop I2S Audio Power Amplifier with Speaker EQ and DRC
TAS5708 www.ti.com ........................................................................................................................................................................................... SLOS570–DECEMBER 2008 20-W STEREO DIGITAL AUDIO POWER AMPLIFIER WITH EQ/DRC and FEEDBACK 1 FEATURES • Audio Input/Output • Benefits – 20-W Into an 8-Ω Load From an 18-V Supply – EQ: Speaker Equalization Improves Audio Performance – Wide PVCC Range (10 V to 26 V); 3.3 V Digital Supply – DRC: Enables Speaker Protection and Night-Mode Listening. – Supports One Serial Audio Input (8 kHz - 48 2 kHz Sample Rates) (LJ/RJ/I S) – Autobank Switching: Preloaded Coefficients for Three Different Sample – Power-Stage Feedback Allows Operation Rates Eliminates the Need to Update From Poorly Regulated Power Supplies Coefficients When Sample Rate Changes • Audio/PWM Processing – Autodetect: Automatically Detects – Factory-Trimmed Internal Oscillator for Sample-Rate Changes Eliminating the Need Automatic Rate Detection for External Microprocessor Intervention – High-End 32-Bit Data Path Audio Processor – Closed-Loop Power Stage: Enables Wide – 14 Biquads for Speaker EQ PVCC Operating Range and Reduced – Dynamic Range Control (DRC) Power Supply Ripple Distortion DESCRIPTION The TAS5708 is a 20-W, efficient, digital audio power amplifier for driving stereo bridge-tied speakers. A 32-bit datapath eliminates the need for pre-scaling before processing and preserves signal integrity without sacrificing dynamic range. A digital audio processor with fully programmable digital filters allows designers to custom tune speakers for optimum sound in small enclosures. A programmable DRC can adjust power levels for a scaleable design while also enabling night-mode listening modes. The closed-loop architecture allows the device to operate from poorly regulated supplies. Figure 1 below shows the benefit of the feedback architecture when a noisy supply (1kHz, 500mVpp ripple) modulates a 10kHz audio input. The figure shows a 40dB improvement in sideband suppression when compared to an open-loop design. This correlates directly to a 24dB improvement in distortion as seen in Figure 2. 20 10 Fundamental Closest Open-Loop Closest Open-Loop Audio Input Competitor Competitor 0 TI Closed-Loop TI Closed-Loop −20 nd 2 Order Sideband 1 −40 40 dB rd Inprovement 3 Order Sideband −60 −80 0.1 −100 −120 Audio Input = 10 kHz P = 3 W O Supply Ripple = 1 kHz, 500 mVpp Supply Ripple = 1 kHz, 500 mVpp −140 0.01 5k 6k 7k 8k 9k 10k 12k 15k 20k 20 100 1k 10k 20k f − Frequency − Hz f − Frequency − Hz G018 G019 Figure 1. Supply Ripple Intermod Distortion Figure 2. THD+N vs Frequency 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. PRODUCTION DATA information is current as of publication date. Copyright © 2008, Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Amplitude − dB THD+N − Total Harmonic Distortion + Noise − %
