TAS5715

具有扬声器均衡、双频带 DRC 和 DC 保护的 25W 立体声 I2S 音频放大器

The 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 20 Hz to 20  kHz.

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Audio Input/Output

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

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50-W Support in PBTL Mode With 4- Load

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Wide PVDD Range, From 8 V to 26 V

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Efficient Class-D Operation Eliminates Need for Heatsinks

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Requires Only 3.3 V and PVDD

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One Serial Audio Input Two Audio Channels

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I2C Address Selection via PIN Chip Select

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Supports 8-kHz to 48-kHz Sample Rate LJ/RJ/I2S

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Headphone PWM Outputs

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Dedicated Pin for External Headphone-Amplifier Shutdown

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Single-Filter PBTL Support

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Audio/PWM Processing

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Independent Channel Volume Controls With 24-dB to Mute

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Independent Headphone Volume

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Programmable Two-Band Dynamic Range Control

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Up to Eight User-Programmable Biquads per Channel

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Programmable Coefficients for DRC Filters

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DC Blocking Filters and PWM DC Detect

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CRC Checksum to Detect Biquad Coefficient Corruption

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General Features

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Serial Control Interface Operational Without MCLK

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Factory-Trimmed Internal Oscillator for Automatic Rate Detection

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Surface Mount, 48-Pin, 7-mm × 7-mm HTQFP Package

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Thermal and Short-Circuit Protection

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Benefits

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EQ: Speaker Equalization Improves Audio Performance

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DRC: Automatic Gain Limiter. Can Be Used As Power Limiter.

Enables Speaker Protection, Easy Listening

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Two-Band DRC: Set Two Different Thresholds for Low- and

High-Frequency Content

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Autobank Switching: Preload Coefficients for Different

Sample Rates. No Need to Write New Coefficients to the

Part When Sample Rate Changes

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Autodetect: Automatically Detects Sample-Rate Changes.

No Need for External Microprocessor Intervention

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Single-Filter PBTL Support Reduces BOM Cost

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Thgermal Dissipation, Improving System Stability