TAS6424M-Q1 45-W, 2-MHz digital input 4-channel automotive class-D audio amplifier with load dump protection and I2C diagnostics

1 Features

• AEC-Q100 Qualified for Automotive Applications 

– Device Temperature Grade 1: 

–40°C to +125°C TA

• Advanced Load Diagnostics 

– DC Diagnostics run without Input Clocks 

– AC Diagnostic for Tweeter Detection with Impedance and Phase Response

• Easily meet CISPR25-L5 EMC Specification 

• Audio Inputs 

– 4 Channel I 2S or 4/8-Channel TDM Input 

– Input Sample Rates: 44.1 kHz, 48 kHz, 96 kHz 

– Input Formats: 16-bit to 32-bit I 2S, and TDM

• Audio Outputs 

– Four-Channel Bridge-Tied Load (BTL) 

– Two-Channel Parallel BTL (PBTL) 

– Up to 2.1 MHz Output Switching Frequency 

– 27 W, 10% THD Into 4 Ω at 14.4 V BTL 

– 45 W, 10% THD Into 2 Ω at 14.4 V BTL 

– 80 W, 10% THD Into 2 Ω at 18 V PBTL

• Audio Performance Into 4 Ω at 14.4 V BTL 

– THD+N < 0.02% at 1 W 

– 42 µVRMS Output Noise 

– –90 dB Crosstalk

• Load Diagnostics 

– Output Open and Shorted Load 

– Output-to-Battery or Ground Shorts 

– Line Output Detection Up to 6 kΩ 

– Host-Independent Operation

• Protection 

– Output Current Limiting 

– Output Short Protection 

– 40 V Load Dump 

– Open Ground and Power Tolerant 

– DC Offset 

– Overtemperature 

– Undervoltage and Overvoltage

• General Operation 

– 4.5 V to 18 V Supply voltage 

– I 2C Control With 4 Address Options 

– Clip Detection and Thermal Warning

2 Applications 

• Automotive Head Unit 

• Automotive External Amplifier