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TAS5708 Datasheet PDF

Part Series:
TAS5708 Series
Category:
-
Description:
20W Stereo Closed-Loop I2S Audio Power Amplifier with Speaker EQ and DRC
Updated Time: 2023/09/27 08:59:18 (UTC + 8)

TAS5708 - TI Specifications

TYPE
DESCRIPTION
Case/Package
HTQFP-48
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TAS5708 - TI Function Overview

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.
Audio Input/Output
20-W Into an 8-Ω Load From an 18-V Supply
Wide PVCC Range (10 V to 26 V); 3.3 V Digital Supply
Supports One Serial Audio Input (8 kHz - 48 kHz Sample Rates) (LJ/RJ/I2S)
Power-Stage Feedback Allows Operation From Poorly Regulated Power Supplies
Audio/PWM Processing
Factory-Trimmed Internal Oscillator for Automatic Rate Detection
High-End 32-Bit Data Path Audio Processor
14 Biquads for Speaker EQ
Dynamic Range Control (DRC)
Benefits
EQ: Speaker Equalization Improves Audio Performance
DRC: Enables Speaker Protection and Night-Mode Listening.
Autobank Switching: Preloaded Coefficients for Three Different Sample Rates Eliminates the Need to Update Coefficients When Sample Rate Changes
Autodetect: Automatically Detects Sample-Rate Changes Eliminating the Need for External Microprocessor Intervention
Closed-Loop Power Stage: Enables Wide PVCC Operating Range and Reduced Power Supply Ripple Distortion
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