TAS6424L-Q1 Datasheet, PDF (14/65 Pages) Texas Instruments – 27-W, 2-MHz Digital Input 4-Channel Automotive Class-D Audio Amplifier With Load-Dump Protection and I2C Diagnostics

TAS6424L-Q1
SLOS809 – MARCH 2017
9 Detailed description
www.ti.com
9.1 Overview
The TAS6424L-Q1 device is a four-channel digital-input Class-D audio amplifier for use in the automotive
environment. The device is designed for vehicle battery operation. The design uses ultra-efficient class-D
technology developed by Texas Instruments specifically tailored for the automotive industry. This technology
allows for reduced power consumption, reduced PCB area, reduced heat, and reduced peak currents in the
electrical system. The device realizes an audio sound-system design with smaller size and lower weight than
traditional class-AB solutions.
The core design blocks are as follows:
• Serial audio port
• Clock management
• High-pass filter and volume control
• Pulse width modulator (PWM) with output stage feedback
• Gate drive
• Power FETs
• Diagnostics
• Protection
• Power supply
• I²C serial communication bus
9.2 Functional Block Diagram
VDD
VCOM VREG
VBAT
GVDD
PVDD
MUTE
STANDBY
WARN
FAULT
MCLK
SCLK
FSYNC
SDIN1
SDIN2
SCL
SDA
I2C_ADDR0
I2C_ADDR1
Digital Core
Serial
Audio
Port
PLL and Clock
Management
2
I C Control
Volume Control
-100 to +24 dB
0.5 dB steps
Reference
Regulators
Gate Drive
Regulator
Closed Loop Class D Amplifier
Channel 1
Powerstage
Digital to PWM
Clip
Detection
Gate
Drives
Channel 2
Powerstage
Channel 3
Powerstage
Channel 4
Powerstage
OUT_1P
OUT_1M
OUT_2P
OUT_2M
OUT_3P
OUT_3M
OUT_4P
OUT_4M
Protection
Overcurrent Limit
Overcurrent
Overtemperature
Overvoltage and Undervoltage
DC Detection
DC Load Diagnostics
Short to GND
Short to Power
Open Load
Shorted Load
AC Load Diagnostics
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