Overview
The TAS6424QDKQQ1 is a 75-W, 2.1-MHz digital-input 4-channel Class-D audio amplifier designed by Texas Instruments for automotive applications. This device is optimized for use in automotive head units and external amplifier modules, offering exceptional sound quality with up to 40 kHz audio bandwidth. It operates with a 2.1 MHz PWM switching frequency, which enhances efficiency and reduces the size and cost of output filters. The amplifier is capable of full operation down to 4.5 V, making it suitable for start/stop events in vehicles.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TAS6424QDKQQ1 |
| Package Type | 56-HSSOP (DKQ) |
| Operating Temperature Range | -40°C to 125°C |
| Supply Voltage Range | 4.5 V to 26.4 V |
| Output Power | 75 W into 4 Ω at 25 V, 45 W into 2 Ω at 14.4 V, 150 W into 2 Ω at 25 V (PBTL) |
| Audio Input Type | Digital (I2S or TDM) |
| Input Sample Rates | 44.1 kHz, 48 kHz, 96 kHz |
| Input Formats | 16-bit to 32-bit I2S, TDM |
| THD + Noise | < 0.03% at 1 W into 4 Ω |
| Output Noise | 42 µV RMS |
| Crosstalk | -90 dB |
| Load Impedance | 2 Ω to 4 Ω |
| Control Interface | I2C with 4 address options |
Key Features
- Advanced Load Diagnostics: Runs without input clocks, AC diagnostic for tweeter detection with impedance and phase response.
- EMC Compliance: Easy to meet CISPR25-L5 EMC specification.
- Automotive Qualification: Qualified for automotive applications, AEC-Q100 compliant.
- Audio Inputs: 4-channel I2S or 4/8-channel TDM input, supports various sample rates and formats.
- Output Configuration: Four-channel bridge-tied load (BTL) with option for parallel BTL (PBTL).
- Protection Features: Output current limiting, output short protection, 40-V load dump, open ground and power tolerant, DC offset, overtemperature, undervoltage, and overvoltage protection.
- Clip Detection and Thermal Warning: Real-time monitoring for clip detection and thermal warnings.
- I2C Control: I2C interface with four address options for flexible control.
Applications
- Automotive Head Units: Designed for use in automotive head units to provide high-quality audio.
- Automotive External Amplifier Modules: Suitable for external amplifier modules in vehicles.
Q & A
- What is the maximum output power of the TAS6424QDKQQ1?
The TAS6424QDKQQ1 can deliver up to 75 W into 4 Ω at 25 V, 45 W into 2 Ω at 14.4 V, and 150 W into 2 Ω at 25 V in parallel BTL configuration.
- What are the supported audio input formats and sample rates?
The device supports 4-channel I2S or 4/8-channel TDM input with sample rates of 44.1 kHz, 48 kHz, and 96 kHz, and formats from 16-bit to 32-bit I2S and TDM.
- What is the operating temperature range of the TAS6424QDKQQ1?
The operating temperature range is -40°C to 125°C.
- What protection features does the TAS6424QDKQQ1 have?
The device includes output current limiting, output short protection, 40-V load dump, open ground and power tolerant, DC offset, overtemperature, undervoltage, and overvoltage protection.
- What is the package type and pin count of the TAS6424QDKQQ1?
The device is packaged in a 56-pin HSSOP (DKQ) package.
- Is the TAS6424QDKQQ1 qualified for automotive applications?
Yes, the TAS6424QDKQQ1 is qualified for automotive applications and is AEC-Q100 compliant.
- What is the control interface of the TAS6424QDKQQ1?
The device uses an I2C interface with four address options.
- What are the key diagnostic features of the TAS6424QDKQQ1?
The device features advanced load diagnostics, including AC diagnostic for tweeter detection with impedance and phase response, and clip detection and thermal warning.
- Can the TAS6424QDKQQ1 operate in start/stop events?
Yes, the device can operate down to 4.5 V, making it suitable for start/stop events in vehicles.
- What is the maximum supply voltage for the TAS6424QDKQQ1?
The maximum supply voltage is 26.4 V.
