Product details

Audio input type Analog Input Architecture Class-D Speaker channels (Max) Mono Power stage supply (Max) (V) 18 Power stage supply (Min) (V) 4.5 Load (Min) (ohms) 2 Output power (W) 22 THD + N @ 1 kHz (%) 0.05 Iq (Typ) (mA) 16 Control interface I2C Closed/open loop Closed Analog supply (Min) (V) 4.5 Analog supply (Max) (V) 18 PSRR (dB) 75 Operating temperature range (C) -40 to 125
Audio input type Analog Input Architecture Class-D Speaker channels (Max) Mono Power stage supply (Max) (V) 18 Power stage supply (Min) (V) 4.5 Load (Min) (ohms) 2 Output power (W) 22 THD + N @ 1 kHz (%) 0.05 Iq (Typ) (mA) 16 Control interface I2C Closed/open loop Closed Analog supply (Min) (V) 4.5 Analog supply (Max) (V) 18 PSRR (dB) 75 Operating temperature range (C) -40 to 125
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • Mono BTL Digital Power Amplifier
  • 22-W Output Power at 10% THD+N into 4 Ω
  • 4.5-V to 18-V Operating Range
  • 85% Efficiency into 4 Ω
  • Differential Analog Input
  • Speaker Guard™ Speaker Protection with Adjustable Power Limiter
  • 75-dB Power-Supply Rejection Ratio (PSRR)
  • Load Diagnostic Functions:
    • Open and Shorted Output Load
    • Output-to-Power and Output-to-Ground Shorts
  • Protection and Monitoring Functions:
    • Short-Circuit Protection
    • 40-V Load Dump Protection per ISO-7637-2
    • Output DC Level Detection while Music is Playing
    • Overtemperature Protection
    • Overvoltage and Undervoltage Protection
  • Thermally Enhanced 16-Pin HTSSOP (PWP) Package with PowerPAD Package (Pad Down)
  • Designed for Automotive EMC Requirements
  • Qualified According to AEC-Q100 Grade 2
  • ISO9000: 2002 TS16949 Certified
  • –40°C to 125°C Ambient Temperature Range

All trademarks are the property of their respective owners.

  • Mono BTL Digital Power Amplifier
  • 22-W Output Power at 10% THD+N into 4 Ω
  • 4.5-V to 18-V Operating Range
  • 85% Efficiency into 4 Ω
  • Differential Analog Input
  • Speaker Guard™ Speaker Protection with Adjustable Power Limiter
  • 75-dB Power-Supply Rejection Ratio (PSRR)
  • Load Diagnostic Functions:
    • Open and Shorted Output Load
    • Output-to-Power and Output-to-Ground Shorts
  • Protection and Monitoring Functions:
    • Short-Circuit Protection
    • 40-V Load Dump Protection per ISO-7637-2
    • Output DC Level Detection while Music is Playing
    • Overtemperature Protection
    • Overvoltage and Undervoltage Protection
  • Thermally Enhanced 16-Pin HTSSOP (PWP) Package with PowerPAD Package (Pad Down)
  • Designed for Automotive EMC Requirements
  • Qualified According to AEC-Q100 Grade 2
  • ISO9000: 2002 TS16949 Certified
  • –40°C to 125°C Ambient Temperature Range

All trademarks are the property of their respective owners.

The TAS5421-Q1 is a mono digital audio amplifier, ideal for use in automotive emergency call (eCall), telematics, instrument cluster, and infotainment applications. The device provides up to 22 W into 4 Ω at less than 10% THD+N from a 14.4-Vdc automotive battery. The wide operating voltage range and excellent efficiency make the device ideal for start-stop support or running from a backup battery when required. The integrated load-dump protection reduces external voltage clamp cost and size, and the onboard load diagnostics report the status of the speaker through I2C.

For all available packages, see the orderable addendum at the end of the datasheet.

The TAS5421-Q1 is a mono digital audio amplifier, ideal for use in automotive emergency call (eCall), telematics, instrument cluster, and infotainment applications. The device provides up to 22 W into 4 Ω at less than 10% THD+N from a 14.4-Vdc automotive battery. The wide operating voltage range and excellent efficiency make the device ideal for start-stop support or running from a backup battery when required. The integrated load-dump protection reduces external voltage clamp cost and size, and the onboard load diagnostics report the status of the speaker through I2C.

For all available packages, see the orderable addendum at the end of the datasheet.

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Technical documentation

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Type Title Date
* Data sheet TAS5421-Q1 22-W Mono Automotive Digital-Audio Amplifier With Load Dump and I2C Diagnostics datasheet (Rev. D) 02 Sep 2015
Application note TAS5421-Q1 and TAS5411-Q1 I2C Applications Note (Rev. B) 07 Jun 2021
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) 26 Aug 2019
Application note AN-1849 An Audio Amplifier Power Supply Design (Rev. C) 27 Jun 2019
Application note Short-to-Battery Protection Strategies for Class-D Amplifiers 11 Nov 2016
Technical article How does the eCall system work? 22 Apr 2016
Technical article Instrument clusters: moving beyond chimes and dings (part 2) 17 Apr 2015
Application note TAS5421-Q1 Class-D Output Snubber Design 19 Mar 2015
Technical article Instrument clusters: moving beyond chimes and dings 11 Feb 2015
Technical article Enhancing the Driving Experience at CES 2015 16 Dec 2014
User guide TAS5421EVM User's Guide 09 Jul 2014
Application note AN-1737 Managing EMI in Class D Audio Applications (Rev. A) 01 May 2013
Application note Filter-Free Class-D Audio Amplifiers 09 Nov 2009
Application note Power Rating in Audio Amplifier (Rev. A) 04 Mar 2005

Design & development

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

Evaluation board

TAS5421EVM — TAS5421EVM audio amplifier eval board for eCall, telematics, instrument cluster and infotainment

The TAS5421EVM showcases the latest TI analog input class D closed-loop mono amplifier. The EVM can be used as stand-alone platform with default I2C register settings. The EVM also works with USB2IIC-2 board and TAS5421-Q1 GUI for programming I2C register settings.

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GUI for evaluation module (EVM)

TAS5421-Q1 EVM GUI Setup

SLOC307.ZIP (413 KB)
Simulation model

TAS5421 IBIS Model

SLOM382.ZIP (19 KB) - IBIS Model
Simulation model

TAS5421-Q1 Unencrypted Pspice Model Package (Rev. A)

SLOM385A.ZIP (93 KB) - PSpice Model
Simulation model

TAS5421 TINA-TI Transient Spice Model

SLOM395.ZIP (13 KB) - TINA-TI Spice Model
Simulation model

TAS5421 TINA-TI Spice Model

SLOM396.ZIP (32 KB) - TINA-TI Spice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Schematic

TAS5421-Q1 Gerber, Schematic, Layout and BOM

SLOC309.ZIP (2882 KB)
Reference designs

PMP9768 — Automotive eCall Power Supply Reference Design with High Intermediate Voltage

This reference design includes a complete power management solution for a standalone emergency call (eCall) system in an automotive environment. The circuit is supplied directly from the car battery rail. It also manages a backup battery to power the eCall system while the car battery rail is not (...)
Reference designs

PMP9769 — Automotive eCall Power Supply Reference Design with Low Intermediate Voltage

This reference design includes a complete power management solution for a standalone emergency call (eCall) system in an automotive environment. The circuit is supplied directly from the car battery rail. It also manages a backup battery to power the eCall system while the car battery rail is not (...)
Package Pins Download
HTSSOP (PWP) 16 View options

Ordering & quality

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