TPA3126D2 - 2x50-W Differential Analog Input, Class-D Amplifier With Low Idle Current

The TPA3126D2 is a 50-W, stereo, low-idle-current Class-D amplifier in a thermallyenhanced package. The TPA3126D2 includes TI’s proprietary hybrid modulation scheme, whichdynamically reduces idle current at low power levels to extend the battery life of portable audiosystems, like bluetooth speakers.

To further simply the design, the Class-D amplifier integrates full protection featuresincluding short circuit, thermal shutdown, overvoltage, undervoltage, and DC speaker protection.Faults are reported back to the processor to prevent devices from being damaged during overloadconditions.

• Longer Battery-Operating Time:
  • Ultra-Low Idle Current: 15 mA at 12 V
• 2 × 50 W Into a 4-Ω Load at 21 V, 10% THD+N
• Wide Voltage Range: 4.5 V to 26 V
• Highly Efficient Class-D Operation
  • Hybrid Modulation Scheme Dynamically Reduces Power Loss
  • Low R_ds(on) of 90-mΩ Enables > 90% Efficiency
• Pop-and-Click Noise Suppression
• Supports Stereo, Mono BTL and Mono PBTL
• Multiple Switching Frequencies:
  • AM Avoidance
  • Master and Slave Synchronization
  • 300-KHz to 1.2-MHz Switching Frequencies
• Selectable Gains: 20 dB, 26 dB, 32 dB, 36 dB
• Programmable Power Limit
• Supports Both Single and Dual Power Supply
• Integrated Protections with Error Report:
  • Overvoltage, Undervoltage, Overtemperature, DC-Detect, and Short Circuit
• Thermally Enhanced Package
  • DAD (32-Pin HTSSOP PowerPAD™ Up)
• Performance Upgrade of the TPA3116D2
  • 70% Less Idle Current; Pin-to-Pin Compatible

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