TAS5706B数据手册TI中文资料规格书

描述 Description

The TAS5706A/B is a 20-W, efficient, digital audio power amplifier for driving stereo bridged-tied speakers. Two serial data inputs allow processing of up to four discrete audio channels and seamless integration to most digital audio processors and MPEG decoders, accepting a wide range of input data and clock rates. A fully programmable data path allows these channels to be routed to the internal speaker drivers or output via the subwoofer or headphone PWM outputs. The TAS5706A/B is a slave-only device receiving all clocks from external sources. The TAS5706A/B operates at a 384-kHz switching rate for 32-, 48-, 96-, and 192-kHz data, and at a 352.8 kHz switching rate for 44.1-, 88.2-, and 176.4-kHz data. The 8× oversampling combined with the fourth-order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz to 20 kHz.

特性 Features

• Audio Input/Output
• 20-W into an 8- Load From an 18-V Supply
• Two Serial Audio Inputs (Four Audio Channels)

• TAS5706A Supports:
• 2-Ch Bridged Outputs (20 W × 2)

• TAS5706B Supports:
• 2-Ch Bridged Outputs (20 W × 2)
• 4-Ch Single-Ended Outputs (10 W × 4)
• 2-Ch Single-Ended + 1-Ch Bridged (2.1 Mode) (10 W × 2 + 20 W)

• Supports 32-kHz-192-kHz Sample Rates (LJ/RJ/I2S)
• Closed Loop Power Stage Architecture
• Improved PSRR Reduces Power Supply Performance Requirements
• Higher Damping Factor Provides for Tighter, More Accurate Sound With Improved Bass Response
• Constant Output Power Over Variation in Supply

• Wide PVCC Range From (10 V to 26 V)
• No Separate Supply Required for Gate Drive

• Headphone PWM Outputs
• Subwoofer PWM Outputs
• AM Interference Avoidance Support
• Audio/PWM Processing
• Independent Channel Volume Controls With 48-dB to -79-dB Range—Soft Mute (50% Duty Cycle)
• Programmable Dynamic Range Control
• 7 Programmable Biquads for Speaker Equalization for Left and Right Channels
• 4 Programmable Biquads for Bass Processing
• Adaptive Biquad Coefficients for EQ and DRC Filters
• Programmable Input and Output Mixers
• Automatic Sample-Rate Detection and Coefficient Banking

• General Features
• Serial Control Interface Operational Without MCLK
• Factory-Trimmed Internal Oscillator Avoids the Need for External Crystal
• Surface Mount, 64-Terminal, 10-mm × 10-mm HTQFP Package
• Thermal and Short-Circuit Protection