The TAS5715 is a 25-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 TAS5715 is a slave-only device receiving all clocks from external sources. The TAS5715 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 20Hz to 20 kHz.

• Audio Input/Output
  • 25-W Into an 8- Load From an 18-V Supply
  • 50-W Support in PBTL Mode With 4- Load
  • Wide PVDD Range, From 8 V to 26 V
  • Efficient Class-D Operation Eliminates Need for Heatsinks
  • Requires Only 3.3 V and PVDD
  • One Serial Audio Input (Two Audio Channels)
  • I2C Address Selection via PIN (Chip Select)
  • Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)
  • Headphone PWM Outputs
  • Dedicated Pin for External Headphone-Amplifier Shutdown
  • Single-Filter PBTL Support
• Audio/PWM Processing
  • Independent Channel Volume Controls With 24-dB to Mute
  • Independent Headphone Volume
  • Programmable Two-Band Dynamic Range Control
  • Up to Eight User-Programmable Biquads per Channel
  • Programmable Coefficients for DRC Filters
  • DC Blocking Filters and PWM DC Detect
  • CRC Checksum to Detect Biquad Coefficient Corruption
• 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: Automatic Gain Limiter. Can Be Used As Power Limiter. Enables Speaker Protection, Easy Listening
  • Two-Band DRC: Set 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
  • Single-Filter PBTL Support Reduces BOM Cost
  • Thgermal Dissipation, Improving System Stability