TPA3126D2DADR

The TPA3126D2 is a 50W stereo Class-D amplifier with low quiescent current in a thermally enhanced package. The TPA3126D2 employs TI's proprietary hybrid modulation scheme, which can dynamically reduce the quiescent current at low power levels, thereby extending the battery life of portable audio systems such as Bluetooth speakers. To further simplify the design, this Class-D amplifier integrates comprehensive protection features, including short-circuit, thermal shutdown, overvoltage, undervoltage, and DC speaker protection. In case of an overload, the device reports the fault condition to the processor, thus preventing itself from being damaged.

Applications

• Speaker docks
• Bluetooth and Wi-Fi speakers
• Voice-controlled or smart speakers
• Soundbars
• Bookshelf stereo systems

Key features

• Longer battery life
• Ultra-low idle current: 15mA at 12V
• 2×50W output power at 21V, 10% THD+N, 4Ω load
• Wide voltage range: 4.5V to 26V
• High-efficiency Class-D operation
• Hybrid modulation scheme for dynamic power loss reduction
• Rds(on) as low as 90mΩ ensures efficiency >90%
• Pop and click noise suppression
• Stereo, mono BTL, and mono PBTL support
• Multiple switching frequencies
• AM rejection
• Master/slave synchronization
• Selectable switching frequency: 300kHz to 1.2MHz
• Gain: 20dB, 26dB, 32dB, 36dB
• Programmable power limiting
• Single-supply and dual-supply support
• Comprehensive protection with fault reporting
• OVP, UVP, OTP, DC detect, and short circuit
• Thermally enhanced DAD package (32-pin HTSSOP PowerPAD, pad-up)
• Enhanced performance over TPA3116D2
• 70% reduction in idle current; pin-to-pin compatible