TAS6421-Q1 Series

Automotive, 75-W, 2-MHz, 1-ch 4.5- to 26.4-V digital input Class-D audio amplifier w/ load dump

Catalog

Automotive, 75-W, 2-MHz, 1-ch 4.5- to 26.4-V digital input Class-D audio amplifier w/ load dump

Part	Package / Case	Package / Case	Package / Case	Max Output Power x Channels @ Load	Voltage - Supply [Min]	Voltage - Supply [Max]	Grade	Type	Mounting Type	Operating Temperature [Min]	Operating Temperature [Max]	Qualification	Supplier Device Package	Output Type
Texas Instruments TAS6421QDKQRQ1	7.5 mm	0.295 in	56-PowerBSSOP	27 W 45 W	4.5 V	26.4 V	Automotive	Class D	Surface Mount	-40 °C	125 °C	AEC-Q100	56-HSSOP	1-Channel (Mono)

Catalog

Automotive, 75-W, 2-MHz, 1-ch 4.5- to 26.4-V digital input Class-D audio amplifier w/ load dump

Key Features

• Advanced load diagnosticsDC Diagnostics run without input clocksAC Diagnostic for tweeter detection with impedance and phase responseEasily meet CISPR25-L5 EMC specificationAEC-Q100 Qualified for automotive applicationsTemperature grade: –40°C to +125°CAudio inputsI2S or 4/8-channel TDM inputInput sample rates: 44.1 kHz, 48 kHz, 96 kHzInput formats: 16-bit to 32-Bit I2S, and TDMAudio outputsSingle-channel bridge-tied load (BTL)Up to 2.1 MHz output switching frequency27 W, 10% THD Into 4 Ω at 14.4 V BTL45 W, 10% THD Into 2 Ω at 14.4 V BTLAudio performance Into 4 Ω at 14.4 V BTLTHD+N < 0.02% at 1 W42 µVRMSOutput Noise–90 dB CrosstalkLoad diagnostics with Host-independent operationOutput open and shorted loadOutput-to-battery or ground shortsLine output detection Up to 6 kΩProtectionOutput current limiting and short protection40 V Load dumpOpen ground and power tolerantOvertemperature warning and shutdownUndervoltage and overvoltage, DC OffsetGeneral operation4.5 V to 26.4 V supply voltageI2C control with 4 address optionsClip detection (latching or non-latching)Advanced load diagnosticsDC Diagnostics run without input clocksAC Diagnostic for tweeter detection with impedance and phase responseEasily meet CISPR25-L5 EMC specificationAEC-Q100 Qualified for automotive applicationsTemperature grade: –40°C to +125°CAudio inputsI2S or 4/8-channel TDM inputInput sample rates: 44.1 kHz, 48 kHz, 96 kHzInput formats: 16-bit to 32-Bit I2S, and TDMAudio outputsSingle-channel bridge-tied load (BTL)Up to 2.1 MHz output switching frequency27 W, 10% THD Into 4 Ω at 14.4 V BTL45 W, 10% THD Into 2 Ω at 14.4 V BTLAudio performance Into 4 Ω at 14.4 V BTLTHD+N < 0.02% at 1 W42 µVRMSOutput Noise–90 dB CrosstalkLoad diagnostics with Host-independent operationOutput open and shorted loadOutput-to-battery or ground shortsLine output detection Up to 6 kΩProtectionOutput current limiting and short protection40 V Load dumpOpen ground and power tolerantOvertemperature warning and shutdownUndervoltage and overvoltage, DC OffsetGeneral operation4.5 V to 26.4 V supply voltageI2C control with 4 address optionsClip detection (latching or non-latching)

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 theTAS6422-Q1,TAS6424L-Q1,TAS6424M-Q1andTAS6424-Q1. 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 theTAS6422-Q1,TAS6424L-Q1,TAS6424M-Q1andTAS6424-Q1.