TAS6424MS-Q1数据手册TI中文资料规格书

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 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 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 kΩ
• 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