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75-W, 2-MHz Digital input 1-channel automotive Class-D audio mmplifier


Package | PIN: HSSOP (DKQ) | 56
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $4.56
10-24 $4.10
25-99 $3.82
100-249 $3.35
250-499 $3.14
500-749 $2.67
750-999 $2.25
1000+ $2.15


  • AEC-Q100 Qualified for automotive applications
    • Temperature grade: –40°C to +125°C
  • Advanced load diagnostics
    • DCDiagnostics run without input clocks
    • AC Diagnostic fortweeter detection with impedance and phase response
  • Easily meet CISPR25-L5 EMC specification
  • Audio inputs
    • I2S or 4/8-channel TDMinput
    • Input sample rates: 44.1 kHz, 48 kHz, 96 kHz
    • Inputformats: 16-bit to 32-Bit I2S, andTDM
  • Audio outputs
    • Single-channel bridge-tied load (BTL)
    • Up to 2.1 MHz output switching frequency
    • 27 W, 10% THDInto 4 Ω at 14.4 V BTL
    • 45 W, 10% THD Into 2 Ω at 14.4 VBTL
  • Audio performance Into 4 Ω at 14.4 V BTL
    • THD+N < 0.02% at 1 W
    • 42µVRMS Output Noise
    • –90 dB Crosstalk
  • Load diagnostics with Host-independent operation
    • Output open and shorted load
    • Output-to-batteryor ground shorts
    • Line output detection Up to 6 kΩ
  • Protection
    • Output current limitingand short protection
    • 40 V Load dump
    • Open ground and power tolerant
    • Overtemperature warning and shutdown
    • Undervoltage and overvoltage, DCOffset
  • General operation
    • 4.5 V to 26.4 V supplyvoltage
    • I2C control with 4address options
    • Clip detection (latching ornon-latching)

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Texas Instruments  PTAS6421QDKQRQ1

TAS6421-Q1 device is a mono-channel digital-input Class-D audio amplifier that implementsa 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 kHzaudio bandwidth. The TAS6421-Q1 is footprint and pin-compatible with TAS642x-Q1 family devices toallow for the flexibility to easily support multiple system configurations with minimal redesigneffort.

The output switching frequency can be set either above the AM band, which eliminatesAM-band interferences and reduces output filtering and cost, or below the AM band to optimizeefficiency.

The device has a built-in load diagnostic function for detecting and diagnosingmisconnected outputs as well as detection of AC-coupled tweeters to help to reduce test time duringthe manufacturing process.

The TAS6421-Q1 mono-channel Class-D audio amplifier is designed for use in automotiveaudio applications. The device provides one channel at 27 W into 4 Ω at 10% THD+N, 45 W into 2 Ω at10% 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 theTAS6422-Q1,TAS6424L-Q1,TAS6424M-Q1 andTAS6424-Q1.