TAS6424L-Q1 Datasheet, PDF (1/65 Pages) Texas Instruments – 27-W, 2-MHz Digital Input 4-Channel Automotive Class-D Audio Amplifier With Load-Dump Protection and I2C Diagnostics

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TAS6424L-Q1
SLOS809 – MARCH 2017
TAS6424L-Q1 27-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
– 27 W, 10% THD Into 4 Ω at 14.4 V
– 27 W, 10% THD Into 2 Ω at 14.4 V
– 80 W, 10% THD Into 2 Ω at 18 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 18 V Supply voltage
– I²C Control With 4 Address Options
– Clip Detection and Thermal Warning
3 Description
The TAS6424L-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 27 W into 2 Ω at 10%
THD+N from a 14.4 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 18 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.
For a pin compatible two-channel devices see the
TAS6422-Q1 device.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TAS6424L-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.