描述 Description

The TAS6424MS-Q1 device is a four-channel digital-input Class-D audio amplifier that implements a 2.1 MHz PWM switching frequency enabling a cost-optimized solution in a very small PCB size, full operation down to 4.5 V for start/stop events, and exceptional sound quality with up to 40 kHz audio bandwidth.

The output switching frequency can be set either 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 TAS6424MS-Q1 Class-D audio amplifier is designed for use in automotive head units and external amplifier modules. For pin compatible one, two and four-channel devices see the the Device Options table.

特性 Features

? AEC-Q100 Qualified for automotive applications
? 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 meets CISPR25-L5 EMC specifications
? Audio inputs
? 4 Channel I2S or 4/8-channel TDM input
? Input sample rates: 44.1 kHz, 48 kHz, 96 kHz
? Input formats: 16-bit to 32-bit I2S, 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 ? at 14.4 V BTL
? 45 W, 10% THD Into 2 ? at 14.4 V BTL
? 80 W, 10% THD Into 2 ? at 18 V PBTL

? Audio performance into 4 ? at 14.4 V BTL
? THD+N RMS output noise
? –90 dB crosstalk

? Load diagnostics
? Output open and shorted load
? Output-to-battery or ground shorts
? Line output detection up to 6 k?
? Host-independent operation

? Protection
? Output current limiting and short protection
? 40 V Load dump
? Open ground and power tolerant
? DC offset
? Over-temperature
? Undervoltage and overvoltage

? General Operation
? 4.5 V to 18 V supply voltage
? I2C Control with 4 address options
? Latched & Non-Latched Clip Detect