Texas Instruments TAS6422E-Q1 Digital-Input Class-D Audio Amplifier
Texas Instruments TAS6422E-Q1 Digital-Input Class-D Audio Amplifier implements a 2.1MHz PWM switching frequency enabling a cost-optimized solution in a very small PCB size. It also enables full operation down to 4.5V for start/stop events and exceptional sound quality with up to 40kHz audio bandwidth. The device adds EMI management features that include a spread-spectrum to assist in system level EMI challenges.
The output switching frequency can be set above the AM band, which eliminates AM-band interferences and reduces output filtering and cost or below the AM band to optimize efficiency. The device has a built-in load diagnostic function for detecting and diagnosing misconnected outputs as well as detection of AC-coupled tweeters to help to reduce test time during the manufacturing process. The Texas Instruments TAS6422E-Q1 Class-D audio amplifier is designed for use in automotive head units and external amplifier modules.
Features
- AEC-Q100 Qualified for automotive applications
- –40°C to +125°C TA temperature grade 1
- Advanced load diagnostics
- DC Diagnostics run without input clocks
- AC Diagnostic for tweeter detection with impedance and phase response
- Easily meets CISPR25-L5 EMC specifications
- Audio inputs
- 2 Channel I2S or 4/8-channel TDM input
- Input sample rates (44.1kHz, 48kHz, 96kHz)
- Input formats (16-bit to 32-bit I2S, and TDM)
- Audio Outputs
- Two-channel bridge-tied load (BTL)
- Single-channel parallel BTL (PBTL)
- Up to 2.1MHz output switching frequency
- 45W, 10% THD+N Into 2Ω at 14.4V BTL
- 75W, 10% THD+N Into 4Ω at 25V BTL
- 150W, 10% THD+N Into 2Ω at 25V PBTL
- Audio performance into 4Ω at 14.4V BTL
- THD+N < 0.02% at 1W
- 42µVRMS output noise
- –90dB crosstalk
- Load diagnostics
- Output open and shorted load
- Output-to-battery or ground shorts
- Line output detection up to 6kΩ
- Host-independent operation
- Protection
- Output current limiting and short protection
- 40V Load dump
- Open ground and power tolerant
- DC offset
- Over-temperature
- Undervoltage and overvoltage
- General Operation
- 4.5V to 18V supply voltage
- I2C Control with four address options
- Latched & non-latched clip detect
- Enhanced EMI management
Applications
- Automotive head unit
- Automotive external amplifier
Functional Block Diagram
Related Development Tool
Texas Instruments TAS6422EQ1EVM Amplifier Evaluation Module (EVM)
Showcases a 2Mhz, 4-channel digital input Class-D audio solution for automotive infotainment.
Publicado: 2021-01-25
| Actualizado: 2022-03-11