TAS5709A数据手册TI中文资料规格书

描述 Description

The TAS5709 is a 20-W, efficient, digital audio-power amplifier for driving stereo bridge-tied speakers. One serial data input allows processing of up to two discrete audio channels and seamless integration to most digital-audio processors and MPEG decoders. The device accepts a wide range of input data and data rates. A fully programmable data path routes these channels to the internal speaker drivers. The TAS5709 is a slave-only device receiving all clocks from external sources. The TAS5709 operates with a PWM carrier between a 384-kHz switching rate and a 352-KHz switching rate, depending on the input sample rate. Oversampling combined with a fourth-order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz to 20 kHz. The TAS5709A is identical in function to the TAS5709, but has a unique I2C device address. The address of the TAS5709 is 0x36. The address of the TAS5709A is 0x3A.

特性 Features

• Audio Input/Output
• 20-W Into an 8- Load From an 18-V Supply
• Wide PVDD Range, From 8 V to 24 V
• Efficient Class-D Operation Eliminates Need for Heatsinks
• Requires Only 3.3 V and PVDD
• One Serial Audio Input (Two Audio Channels)
• Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)

• Audio/PWM Processing
• Independent Channel Volume Controls With 24 dB to Mute
• Soft Mute (50% Duty Cycle)
• Programmable 2-Band Dynamic Range Control
• 22 Programmable Biquads for Speaker EQ and Other Audio-Processing Features
• Programmable Coefficients for DRC Filters
• Programmable Input and Output Mixers
• DC Blocking Filters
• Support for 3D Effects
• Pseudo Bass Support

• General Features
• Serial Control Interface Operational Without MCLK
• Factory-Trimmed Internal Oscillator for Automatic Rate Detection
• Surface Mount, 48-Pin, 7-mm × 7-mm HTQFP Package
• Thermal and Short-Circuit Protection

• Benefits
• EQ: Speaker Equalization Improves Audio Performance
• DRC: Dynamic Range Compression. Can Be Used As Power Limiter. Enables Speaker Protection, Easy Listening, Night-Mode Listening
• Two-Band DRC: Sets Two Different Thresholds for Low- and High-Frequency Content
• Autobank Switching: Preload Coefficients for Different Sample Rates. No Need to Write New Coefficients to the Part When Sample Rate Changes
• Autodetect: Automatically Detects Sample-Rate Changes. No Need for External Microprocessor Intervention