TAS2560

• Ultra Low-Noise Mono Boosted Class-D Amplifier
  • 5.6 W at 1% THD+N and 6.9 W at 10% THD+N into 4-Ω Load from 4.2-V Supply
  • 3.7 W at 1% THD+N and 4.5 W at 10% THD+N into 8-Ω Load from 4.2-V Supply
• Output Noise for DAC + Class-D(ICN) is 16.2 µV
• DAC + Class-D SNR 111 dB at 1%THD+N / 8 Ω
• THD+N –89 dB at 1 W / 8 Ω with Flat Frequency Response
• Post-Filter Feedback (PFFB)
• PSRR 110 dB for 200 mVpp Ripple at 217 Hz
• Input Sample Rates from 8 kHz to 96 kHz
• High Efficiency Class-H Boost Converter
  • Automatically Adjusts Class-D Supply
  • Multi-level Tracking to Improve Efficiency
• Built-In Speaker Sense
  • Measures Speaker Current and Voltage
  • Measures VBAT Voltage, Chip Temperature
• Built-In Automatic Gain Control (AGC)
  • Limits Battery Current Consumption
• Adjustable Class-D Switching Edge-Rate Control
• Power Supplies
  • Boost Input: 2.9 V to 5.5 V
  • Analog/Digital: 1.65 V to 1.95 V
  • Digital I/O: 1.62 V to 3.6 V
• Thermal, Short-Circuit, and Under-Voltage Protection
• I2S, Left-Justified, Right-Justified, DSP, and TDM, and PDM
• I2C Interface for Register Control
• Stereo Configuration Using Two TAS2560 Devices

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The TAS2560 is a low-power, high-performance, digital input, boosted Class-D Audio amplifier that can be easily implemented in both mono and stereo (x2) applications. The device features an ultra low-noise audio DAC and Class-D power amplifier which incorporates speaker voltage and current sensing feedback for use with speaker protection algorithms.

A Class-H boost converter generates the Class-D amplifier supply rail. When the audio signal requires only a lower Class-D output power, system efficiency is improved by deactivating the boost and connecting VBAT directly to the Class-D amplifier supply. When higher audio output power is required, the multi-level boost re-activates tracking the signal to provide the additional voltage to the load.

A configurable on-chip Battery Guard system reduces the audio output power during the periods of low battery voltage to minimize the battery dropping below system brownout conditions. Additionally, faults such as brownout, over-current, and over-temperature can be reported back to the host processor using the IRQ pin. All protection statuses are available via a register read.