22-W Mono Automotive Digital Audio Amplifier With Load Dump and I2C Diagnostics - TAS5421-Q1


22-W Mono Automotive Digital Audio Amplifier With Load Dump and I2C Diagnostics



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.


  • 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 -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
    • Over- 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

View more

Parametrics Compare all products in Analog Input Amplifiers

Max. Power to Bridge Tied Load
Min. Supported Bridge Tied Load
Closed/Open Loop
Max Speaker Outputs (#)
Input Type
Control Type
Analog Supply Min [V]
Analog Supply Max [V]
Power Stage Supply Max (V)
Operating Temperature Range (C)
Package Group
Package Size (mm2=WxL)
Approx. Price (US$)
TAS5421-Q1 TAS5411-Q1 TPA3111D1-Q1
22     8     10    
2     2     4    
Closed     Closed     Closed    
1     1     1    
Analog     Analog     Analog    
I2C     I2C     Hardware    
4.5     4.5      
18     18      
18     18     26    
Automotive     Automotive     Automotive    
-40 to 125     -40 to 125      
16HTSSOP: 32 mm2: 6.4 x 5     16HTSSOP: 32 mm2: 6.4 x 5     28HTSSOP: 62 mm2: 6.4 x 9.7    
1.74 | 1ku     1.48 | 1ku     0.90 | 1ku