Texas Instruments TAS5815 Stereo Class-D Audio Amplifier
Texas Instruments TAS5815 Stereo Class-D Audio Amplifier is a high-efficiency digital input Class-D audio amplifier with an integrated audio processor with up to 96kHz architecture. It includes adaptive modulation schemes based on output power and low RDS(on)= 120mΩ. It also supports the DPEQ process for easy tuning. The DPEQ is used to mix the audio signals through two signal paths (low level and high level). These two paths are used with separate equalization properties. A third path monitors the incoming audio and determines these two parts' thresholds and mixing characteristics. Thus, the mix between the two high- and low-level channels is dynamic and depends on the incoming audio.
The high-performance closed-loop architecture and wide-switching frequency range reduce the solution size by reducing passive components and minimizing the inductor size in most applications. TAS5815 has an integrated audio processor with up to 96kHz architecture to support advanced process flow. The device has an integrated proprietary algorithm called Class-H. The Class-H algorithm detects the upcoming audio power demand and provides a PWM control signal for the former DC-DC converter via the feedback pin (FB). This feature increases the system-level efficiency and reduces total power consumption. The TAS5815 supports up to 2.5ms of delay buffer to look ahead at the audio signal and prevents audio clipping distortion.
The Texas Instruments TAS5815 also supports speaker load open/short detection and report detection results with a register report.
Features
- Support multiple output configurations
- 2 × 30W in 2.0 mode (6Ω, 21V, THD+N=1%)
- 58W in mono mode (3Ω, 21V, THD+N=1%)
- Excellent audio performance
- THD+N ≤ 0.03% at 1W, 1kHz, PVDD = 12V
- SNR ≥ 110dB (A-weighted), ICN ≤ 45µVRMS
- Efficient class-D operation of > 90% power efficiency, 120mΩ RDS(on)
- Flexible power supply configurations
- PVDD: 4.5V to 26.4V
- DVDD and I/O: 1.8V or 3.3V
- Flexible audio I/O
- Supports 32, 44.1, 48, 88.2, 96kHz sample rates
- I2S, LJ, RJ, TDM
- SDOUT for audio monitoring, sub-channel, or echo cancellation
- Support 3-wire digital audio interface (no MCLK required)
- Supports stereo bridge-tied or mono parallel bridge-tied loads (BTL and PBTL)
- Supports eight steps of Class-H DC-DC control
- Excellent integrated self-protection
- Over-current error (OCE)
- Over-temperature warning (OTW)
- Over-temperature error (OTE)
- Under or over-voltage lock-out (UVLO/OVLO)
- Enhanced audio processing
- Sample rate converter
- 96kHz processor sampling
- DC blocking, 2 ×15 BQs, DPEQ, THD manager
- 4th Order 2-band DRC + AGL
- Over temperature fold back
- Eight Class-H DC-DC control steps with a 2.5ms look-ahead buffer for BTL mode and 5ms for PBTL mode at a 48k sample rate
- Easy system integration
- I2C Software Control
- Reduced solution size
- Fewer passives are required compared to open-loop devices
- Ultra-low EMI with current EMI technology
- No large inductors are required for most applications
Applications
- Soundbars, PC audio
- Wireless and BLUETOOTH® speakers
- DTV, HDTV, UHD, and multi-purpose monitors
Additional Resources
Functional Block Diagram
