TAS6421-Q1 Amplifier Datasheet

TAS6421-Q1 Datasheet, PDF, Equivalent


Part Number

TAS6421-Q1

Description

Audio Amplifier

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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TAS6421-Q1
SLOSE32A – APRIL 2019 – REVISED OCTOBER 2019
TAS6421-Q1 75-W, 2-MHz Digital Input 1-Channel Automotive Class-D Burr-Brown™
Audio Amplifier with Load Dump Protection and I2C Diagnostics
1 Features
1 Advanced load diagnostics
– DC Diagnostics run without input clocks
– AC Diagnostic for tweeter detection with
impedance and phase response
• Easily meet CISPR25-L5 EMC specification
• AEC-Q100 Qualified for automotive applications
– Temperature grade: –40°C to +125°C
• Audio inputs
– 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
– Single-channel bridge-tied load (BTL)
– 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
• Audio performance Into 4 at 14.4 V BTL
– THD+N < 0.02% at 1 W
– 42 µVRMS Output Noise
– –90 dB Crosstalk
• Load diagnostics with Host-independent operation
– Output open and shorted load
– Output-to-battery or ground shorts
– Line output detection Up to 6 k
• Protection
– Output current limiting and short protection
– 40 V Load dump
– Open ground and power tolerant
– Overtemperature warning and shutdown
– Undervoltage and overvoltage, DC Offset
• General operation
– 4.5 V to 26.4 V supply voltage
– I2C control with 4 address options
– Clip detection (latching or non-latching)
2 Applications
Automotive head unit and external amplifier
eCall (emergency call)
Virtual engine sound system (VESS)
1
3 Description
TAS6421-Q1 device is a mono-channel digital-input
Class-D Burr-Brown™ audio amplifier that
implements a 2.1 MHz PWM switching frequency
enabling a cost-optimized solution for 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. TAS6421-Q1 is footprint and
pin-compatible with TAS642x-Q1 family devices to
allow for the flexibility to easily support multiple
system configurations with minimal redesign effort.
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.
TAS6421-Q1 provides one channel at 27 W into 4
at 10% THD+N, 45 W into 2 at 10% THD+N from a
14.4 V supply or 75 W into 4 at 10% THD+N from
a 25 V supply.
For pin compatible two- and four-channel devices see
the TAS6422-Q1, TAS6424L-Q1, TAS6424M-Q1 and
TAS6424-Q1.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TAS6421-Q1
HSSOP (56)
18.41 mm × 7.49 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Functional Block Diagram
VDD
VCOM VREG
VBAT
GVDD
PVDD
MUTE
STANDBY
WARN
FAULT
MCLK
SCLK
FSYNC
SDIN1
Digital Core
Serial
Audio
Port
Volume
Control -100
to +24 dB,
0.5 dB steps
Reference
Regulators
Gate Drive
Regulator
Closed Loop Class D Amplifier
Digital to PWM
Clip
Detection
Gate
Driver
Powerstage
OUT_P
OUT_M
SCL
SDA
I2C_ADDR0
I2C_ADDR1
PLL and Clock
Management
I2C Control
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
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.

TAS6421-Q1
TAS6421-Q1
SLOSE32A – APRIL 2019 – REVISED OCTOBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Options....................................................... 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 6
7.1 Absolute Maximum Ratings ...................................... 6
7.2 ESD Ratings.............................................................. 6
7.3 Recommended Operating Conditions....................... 7
7.4 Thermal Information .................................................. 7
7.5 Electrical Characteristics........................................... 8
7.6 Typical Characteristics ............................................ 12
8 Parameter Measurement Information ................ 16
9 Detailed description............................................. 17
9.1 Overview ................................................................. 17
9.2 Functional Block Diagram ....................................... 17
9.3 Feature Description................................................. 18
9.4 Device Functional Modes........................................ 28
9.5 Programming........................................................... 29
9.6 Register Maps ......................................................... 32
10 Application and Implementation........................ 46
10.1 Application Information.......................................... 46
10.2 Typical Applications .............................................. 47
11 Power Supply Recommendations ..................... 50
12 Layout................................................................... 50
12.1 Layout Guidelines ................................................. 50
12.2 Layout Example .................................................... 51
12.3 Thermal Considerations ........................................ 51
13 Device and Documentation Support ................. 53
13.1 Documentation Support ........................................ 53
13.2 Receiving Notification of Documentation Updates 53
13.3 Community Resources.......................................... 53
13.4 Trademarks ........................................................... 53
13.5 Electrostatic Discharge Caution ............................ 53
13.6 Glossary ................................................................ 53
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (April 2019) to Revision A
Page
• Changed the device status From: Advanced Information To: Production data ..................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: TAS6421-Q1
Copyright © 2019, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity TAS6421-Q1 SLOSE32A – APRIL 2 019 – REVISED OCTOBER 2019 TAS6421-Q1 75-W, 2-MHz Digital Input 1-Channel Au tomotive Class-D Burr-Brown™ Audio Am plifier with Load Dump Protection and I 2C Diagnostics 1 Features •1 Advance d load diagnostics – DC Diagnostics r un without input clocks – AC Diagnost ic for tweeter detection with impedance and phase response • Easily meet CIS PR25-L5 EMC specification • AEC-Q100 Qualified for automotive applications Temperature grade: –40°C to +125 C • Audio inputs – I2S or 4/8-chan nel TDM input – Input sample rates: 4 4.1 kHz, 48 kHz, 96 kHz – Input forma ts: 16-bit to 32-Bit I2S, and TDM • A udio outputs – Single-channel bridge- tied load (BTL) – Up to 2.1 MHz outpu t 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 • Audio performance Into 4 Ω at 14.4 V BTL – THD+N < 0.02% at 1 W – 42 µVRMS Output Noise – –90 dB Crosstalk • Load .
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