1 Features

1• 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

2 Applications

• Automotive Emergency Call (eCall) Amplifier

• Telematics Systems

• Instrument Cluster Systems

• Infotainment Audio

3 Description

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 startstop

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.