Texas Instruments TPA3126D2 Class-D Audio Amplifier
Texas Instruments TPA3126D2 Class-D Audio Amplifier is a 50W, stereo, low-idle-current Class-D amplifier in a thermally enhanced package. The TPA3126D2 includes TI’s proprietary hybrid modulation scheme, which dynamically reduces idle current at low power levels to extend the battery life of portable audio systems like BLUETOOTH® speakers. The Class-D amplifier integrates full protection features, including short circuit, thermal shutdown, overvoltage, undervoltage, and DC speaker protection, to further simplify the design. Faults are reported to the processor to prevent devices from being damaged during overload conditions.
Features
- Longer battery-operating time
- 15mA at 12V ultra-low idle current
- 2×50W into a 4Ω load at 21V, 10% THD+N
- 4.5V to 26V wide voltage range
- Highly efficient Class-D operation
- A hybrid modulation scheme dynamically reduces power loss
- Low Rds(on) of 90mΩ enables > 90% efficiency
- Pop-and-click noise suppression
- Supports stereo, mono BTL, and mono PBTL
- Multiple switching frequencies
- AM avoidance
- Master and slave synchronization
- 300KHz to 1.2MHz switching frequencies
- 20dB, 26dB, 32dB, and 36dB selectable gains
- 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
Applications
- Speaker docks
- Bluetooth and Wi-Fi® speakers
- Voice-operated speakers or smart speakers
- Sound bars
- Bookshelf stereo system
Simplified Application Circuit
Inilathala: 2018-06-26
| Na-update: 2023-03-07