Texas Instruments TPA6404-Q1 Class-D Audio Amplifier
Texas Instruments TPA6404-Q1 Class-D Audio Amplifier is a four-channel analog-input Class-D audio amplifier that implements a 2.1MHz PWM switching frequency. This switching frequency enables a cost-optimized solution in a very small 4.5cm2 PCB size, full operation down to 4.5V for start/stop events, and exceptional sound quality with up to 100kHz audio bandwidth. The Texas Instruments TPA6404-Q1 Class-D audio amplifier has an optimal design for entry-level automotive head units that provide analog audio input signals as part of a system design. The Class-D topology dramatically improves efficiency over traditional linear amplifier solutions. The output switching frequency operates above the AM band, eliminating the AM band interference and reducing the output filter size and cost.
Features
- Advanced load diagnostics
- AC diagnostic for tweeter detection with impedance and phase response
- An integrated sine wave generator
- Easy to meet CISPR25-L5 EMC specification
- AEC-Q100 qualified with the following results for automotive applications
- Device temperature Grade 1 (–40°C to 125°C ambient operating temperature range)
- Device HBM ESD Classification Level: 3A
- Device CDM ESD Classification Level: C4B
- Audio inputs
- 4-channel differential analog input
- Four I2C-controlled gain options
- High input impedance for low-value AC-coupling capacitor
- Audio outputs
- Four-channel Bridge-Tied Load (BTL), with the option of Parallel BTL (PBTL)
- Up to 2.1MHz output switching frequency
- 27W, 10% THD into 4Ω at 14.4V
- 45W, 10% THD into 2Ω at 14.4V
- 85W, 10% THD into 1Ω at 14.4V PBTL
- Audio performance into 4Ω at 14.4V, 1kHz
- THD+N < 0.01%
- 42µVRMS output noise
- -90dB crosstalk
- Load diagnostics
- Output open and shorted load
- Output-to-battery or ground shorts
- Line output detection up to 6kΩ
- Runs without input clocks
- Protection
- Output current limiting
- Output short protection
- 40V load dump
- Fortuitous open ground and power tolerant
- DC offset
- Over temperature
- Undervoltage and overvoltage
- General operation
- 4.5V to 18V supply voltage
- I2C control with 4 address options
- Clip detection and thermal foldback
Applications
- Automotive head units
- Automotive external amplifier modules
Functional Block Diagram
Related Development Tool
Texas Instruments TPA6404Q1EVM Amplifier Evaluation Module (EVM)
Demonstrates the TPA6404-Q1, a four-channel analog-input Class-D audio amplifier.
Publicado: 2018-05-14
| Actualizado: 2023-01-03