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20-W Stereo Closed-Loop I2S Audio Power Amplifier with Speaker EQ and DRC


Package | PIN: PHP | 48
Temp: S (0 to 85)
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Qty Price
1-9 $4.98
10-24 $4.48
25-99 $4.19
100-249 $3.75
250-499 $3.50
500-749 $3.05
750-999 $2.64
1000+ $2.59


  • Audio Input/Output
    • 20-W Into an 8-Ω Load From an 18-V Supply
    • Wide PVCC Range (10 V to 26 V); 3.3 V Digital Supply
    • Supports One Serial Audio Input (8 kHz - 48 kHz Sample Rates) (LJ/RJ/I2S)
    • Power-Stage Feedback Allows Operation From Poorly Regulated Power Supplies
  • Audio/PWM Processing
    • Factory-Trimmed Internal Oscillator for Automatic Rate Detection
    • High-End 32-Bit Data Path Audio Processor
    • 14 Biquads for Speaker EQ
    • Dynamic Range Control (DRC)
  • Benefits
    • EQ: Speaker Equalization Improves Audio Performance
    • DRC: Enables Speaker Protection and Night-Mode Listening.
    • Autobank Switching: Preloaded Coefficients for Three Different Sample Rates Eliminates the Need to Update Coefficients When Sample Rate Changes
    • Autodetect: Automatically Detects Sample-Rate Changes Eliminating the Need for External Microprocessor Intervention
    • Closed-Loop Power Stage: Enables Wide PVCC Operating Range and Reduced Power Supply Ripple Distortion

Texas Instruments  TAS5708PHPR

The TAS5708 is a 20-W, efficient, digital audio power amplifier for driving stereo bridge-tied speakers. A 32-bit datapath eliminates the need for pre-scaling before processing and preserves signal integrity without sacrificing dynamic range. A digital audio processor with fully programmable digital filters allows designers to custom tune speakers for optimum sound in small enclosures. A programmable DRC can adjust power levels for a scaleable design while also enabling night-mode listening modes.

The closed-loop architecture allows the device to operate from poorly regulated supplies. Figure 1 below shows the benefit of the feedback architecture when a noisy supply (1kHz, 500mVpp ripple) modulates a 10kHz audio input. The figure shows a 40dB improvement in sideband suppression when compared to an open-loop design. This correlates directly to a 24dB improvement in distortion as seen in Figure 2.