TAS6424-Q1 Datasheet, PDF (1/63 Pages) Texas Instruments – 75-W, 2-MHz Digital Input 4-Channel Automotive Class-D Audio Amplifier With Load-Dump Protection and I2C Diagnostics

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TAS6424-Q1
SLOS870A – SEPTEMBER 2016 – REVISED OCTOBER 2016
TAS6424-Q1 75-W, 2-MHz Digital Input 4-Channel Automotive Class-D Audio Amplifier
With Load-Dump Protection and I²C Diagnostics
1 Features
•1 Qualified for Automotive Applications
• 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), With
Option of Parallel BTL (PBTL)
– Up to 2.1-MHz Output Switching Frequency
– 75 W, 10% THD Into 4 Ω at 25 V
– 45 W, 10% THD Into 2 Ω at 14.4 V
– 150 W, 10% THD Into 2 Ω at 25 V PBTL
• Audio Performance Into 4 Ω at 14.4 V
– THD+N < 0.03% at 1 W
– 42-µV_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
– Runs Without Input Clocks
– AC Diagnostic for Tweeter detection
• Protection
– Output Current Limiting
– Output Short Protection
– 40-V Load Dump
– Open Ground and Power Tolerant
– DC Offset
– Overtemperature
– Undervoltage and Overvoltage
• General Operation
– EVM Passes CISPR25-L5 EMC Specification
– 4.5-V to 26.4-V Supply voltage
– I²C Control With 4 Address Options
– Clip Detection and Thermal Warning
3 Description
The TAS6424-Q1 device is a Four-channel digital-
input Class-D audio amplifier designed for use in
automotive head units and external amplifier
modules. The device provides four channels at 27 W
into 4 Ω at 10% THD+N and 45 W into 2 Ω at 10%
THD+N from a 14.4-V supply and 75 W into 4 Ω at
10% THD+N from a 25-V supply. The Class-D
topology dramatically improves efficiency over
traditional linear amplifier solutions. The output
switching frequency can be set either above the AM
band, which eliminates the AM-band interference and
reduces output filtering and cost, or below AM band
to optimize efficiency.
The wide supply-voltage range from 4.5 V to 26.4 V
helps minimize audio artefacts in start-stop
applications
The device incorporates all the functionality required
to perform in the demanding OEM applications area.
The device has a built-in load diagnostic function for
detecting and diagnosing misconnected outputs as
well as detection AC-coupled tweeters to help to
reduce test time during the manufacturing process.
The device is offered in a 56-pin HSSOP
PowerPAD™ package with the exposed thermal pad
up.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TAS6424-Q1
HSSOP (56)
18.41 mm × 7.49 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
PCB AREA
2 Applications
• Automotive Head Units
• Automotive External Amplifier Modules
27 mm
25-W 4-channel
5.9 cm²
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.