TAS5708 - 具有片上 DRC 和扬声器均衡的 20W 立体声闭环 12S 输入音频功率放大器

TAS5708是TI德州仪器公司的一款无产品，TAS5708是具有片上 DRC 和扬声器均衡的 20W 立体声闭环 12S 输入音频功率放大器，本站介绍了TAS5708的封装应用图解、特点和优点、功能等，并给出了与TAS5708相关的TI元器件型号供参考。

TAS5708 - 具有片上 DRC 和扬声器均衡的 20W 立体声闭环 12S 输入音频功率放大器 - 无 - 中/高功率D类放大器 - 德州仪器

产品描述

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.

产品特性

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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