Texas Instruments TPA31xD2 Class-D Stereo Amplifiers
Texas Instruments TPA31xD2 Class-D Stereo Amplifiers are stereo-efficient, digital amplifier power stage devices for driving speakers up to 100W/2Ω in mono. The high-efficiency characteristics allow these amps to do 2 x 15W without an external heat sink on a single layer PCB. The TPA3118D2 can run 2 x 30W/8Ω without a heat sink on a dual-layer PCB. If higher power is needed, the TPA3116D2 does 2x50W/4Ω with a small heat sink attached to its top-side power pad. All three devices share the same footprint, enabling a single PCB to be used across different power levels. TI TPA31xD2 advanced oscillator/PLL circuit employs a multiple switching frequency option to avoid AM interferences. This is achieved together with a master/slave option, making it possible to synchronize multiple devices.
Features
- Supports multiple output configurations
- TPA3116D2: 2 x 50W into a 4Ω BTL load at 21V
- TPA3118D2: 2 x 30W into a 8Ω BTL load at 24V
- TPA3130D2: 2 x 15W into a 8Ω BTL load at 15V
- Efficient Class-D operation
- >90% power efficiency combined with low idle loss greatly reduces heat sink size
- Advanced modulation schemes
- Multiple switching frequencies
- AM avoidance
- Master and slave synchronization
- Up to 1.2MHz switching frequency
- Wide 4.5V to 26V voltage range
- Feedback power-stage architecture with high PSRR reduces PSU requirements
- Programmable power limit
- Differential and single-ended inputs
- Stereo and mono mode with single-filter mono configuration
- Single power supply reduces component count
- Integrated self-protection circuits including overvoltage, undervoltage, overtemperature, DC detect, and short circuit with error reporting
- Thermally enhanced packages
- DAD (32-pin HTSSOP pad up)
- DAP (32-pin HTSSOP pad down)
Applications
- Mini-micro components, speaker bars, docks
- Aftermarket automotive
- CRT TV
- Consumer audio
Published: 2012-06-08
| Updated: 2022-03-11