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Product details

Parameters

Audio input type Digital Input Architecture Class-D Speaker channels (Max) Mono Power stage supply (Max) (V) 26.4 Power stage supply (Min) (V) 4.5 Load (Min) (ohms) 2 Output power (W) 75 THD + N @ 1 kHz (%) 0.02 Iq (Typ) (mA) 47 Control interface I2C Closed/open loop Closed Analog supply (Min) (V) 4.5 Analog supply (Max) (V) 26.4 Sampling rate (Max) (kHz) 96 PSRR (dB) 75 Operating temperature range (C) -40 to 125 open-in-new Find other Speaker amps

Package | Pins | Size

HSSOP (DKQ) 56 191 mm² 18.42 x 10.35 open-in-new Find other Speaker amps

Features

  • 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 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 diagnostics with Host-independent operation
    • Output open and shorted load
    • Output-to-battery or ground shorts
    • Line output detection Up to 6 kΩ
  • 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)

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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 Ω at 10% THD+N, 45 W into 2 Ω at 10% THD+N from a 14.4 V supply or 75 W into 4 Ω 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.

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Same functionality and pinout but is not an equivalent to the compared device:
TAS6422-Q1 ACTIVE Automotive, 75-W, 2-MHz, 2-ch 4.5- to 26.4-V digital input Class-D audio amplifier w/ load dump TAS6422-Q1 is our 2-channel automotive Class-D digital input amplifier which implements 2.1MHz switching frequency
TAS6424-Q1 ACTIVE Automotive, 75-W, 2-MHz, 4-ch 4.5- to 26.4-V digital input Class-D audio amplifier w/ load dump TAS6424-Q1 is our 4-channel automotive Class-D digital input amplifier which implements 2.1MHz switching frequency

Technical documentation

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Type Title Date
* Datasheet TAS6421-Q1 75-W,​​​ 2-MHz Digital Input 1-Channel Automotive Class-D Burr-Brown™ Audio Amplifier with Load Dump Protection and I2C Diagnostics datasheet (Rev. A) Oct. 07, 2019
Application notes Diagnostics and Protections in Automotive Audio Systems (Rev. A) Sep. 24, 2019
Technical articles TI Burr-Brown™ technology: always on the edge of audio innovation Sep. 19, 2019
Application notes Inductor Selection Guide for 2.1 MHz Class-D Amplifiers (Rev. A) Sep. 05, 2019
White papers Audio Innovation: Trends in Automotive, Smart Home and Pro Audio Applications Aug. 21, 2019
User guides TAS6421-Q1 EVM User's Guide Apr. 25, 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
Description
The TAS6421-Q1 evaluation module showcases the industry's first 2.1-MHz 1-Ch Digital Input Class-D Audio solution for Automotive Infotainment applications. TAS6421-Q1’s 2.1-MHz switching frequency allows customers to significantly reduce inductor size and cost and optimize total system cost (...)
Features
  • 2.1-Mhz Switching Frequency
  • 1-Ch 27-W/Ch at 10% THD+N into 4-Ω with a 14.4-V supply
  • I2C Diagnostics and Protection
  • CISPR25, class 5 Radiated/Conducted Emission compliant
  • Optical SPDIF, USB and external I2S or TDM input options

Design tools & simulation

SIMULATION MODELS Download
SLOM478.ZIP (26 KB) - IBIS Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

REFERENCE DESIGNS Download
Automotive domain controller for gateway, assisted and automated driving systems reference design
TIDEP-01020 Decentralized vehicle architectures on the road today use individual ECUs that lack processing power and high-speed interfaces to handle the complex tasks and data movement needs of newly emerging automotive architectures. Higher level functions require the right combination of DMIPS, data bandwidth (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
HSSOP (DKQ) 56 View options

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