TAS5715PHPR Integrated Circuits (ICs)

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1. DESCRIPTION

The TAS5715PHPR 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 TAS5715PHPR is a slave-only device receiving all clocks from external sources. The TAS5715PHPR 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.

2. FEATURES

    1. Audio Input/Output 

        – 25-W Into an 8-Ω Load From an 18-V Supply

        – 50-W Support in PBTL Mode With 4-Ω 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

    2. Audio/PWM Processing

        – Cost 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

    3. 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

    4. 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