TAS6422Q1EVM: 75W x 2 @ 4Ω, Digital Input, w/I2C Diagnostics, Class-D, 2.1Mhz

Summary

The TAS6422Q1EVM showcases the first true 2.1Mhz 2-Ch Digital Input Class-D Audio Solution for Automotive Infotainment in the market. TAS6422’s 2.1-Mhz switching frequency allows customers to significantly reduce inductor size and cost and optimize total system cost. TAS6422 delivers 25W (10% THD+N) per channel into 4-Ω with a 14.4-V supply. TAS6422’s wide supply voltage capabilities, from 4.5-V to 26-V, makes it ideal for head unit and external amplifier systems while delivering top-of-the-line performance during start-stop low voltage transient events. TAS6422 integrates I2C diagnostics and protection to match and surpass the highest standards for automotive quality and reliability. TAS6422 CISPR25-L5 compliant EMC performance simplifies system design, lowers development cost and accelerates time-to-market delivery.

TAS6422 EVM features: Optical SPDIF, USB and PSIA (external I2S) input options and On-board USB-I2C controller for GUI driven EVM evaluation.

Features:

2.1-Mhz switching frequency
2-Ch 25-W/Ch at 10% THD+N into 4-Ω with a 14.4-V supply
I2C diagnostics and protection
CISPR25, class 5 radiated/conducted emission compliant
Optical SPDIF, USB and PSIA (external I2S) input options

Specifications

Manufacturer	Texas Instruments
Category	Audio Amplifiers
Eval Board Part Number	296-48279-ND
Eval Board Supplier	Texas Instruments
Eval Board	Normally In Stock
Amplifier Type	Class D
Number of Outputs	Stereo
Output Power (RMS) @ Load	25 W x 2 @ 4 Ω
Voltage In	4.5 ~ 26.4 V
THD+N (1kHz) @ Conditions	< 0.09% @ 12 mW ~ 40 W (4 Ω, 24 V, 384 kHz) < 0.06% @ 15 mW ~ 45 W (4 Ω, 24 V, 2.1 MHz) < 0.03% @ 50 mW ~ 18 W (4 Ω, 14.4 V, 2.1 MHz) < 0.02% @ 150 mW ~ 15 W (4 Ω, 14.4 V, 384 kHz)
Features	Current Limit (Adj. or Fixed) Over Voltage Protection PWM Interface Short Circuit Protection Thermal Protection Under Voltage Protection, Brown-Out
Efficiency @ Conditions	>85%, 24 V in, 4 Ω @ 25 ~ 80 W (384 kHz) >75%, 24 V in, 4 Ω @ 30 ~ 100 W (2.1 MHz) >75%, 14.4 V in, 2 Ω @ 7 ~ 80 W (384 kHz) >65%, 14.4 V in, 2 Ω @ 7 ~ 80 W (2.1 MHz)
Standby Current [Typical]	1 µA
Quiescent Current [Typical]	36 mA
Component Count + Extras	125 + 28
Application / Target Market	Automotive
Design Author	Texas Instruments
Main I.C. Base Part	TAS6422
Quiescent Current [Maximum]	45 mA
Standby Current [Maximum]	2 µA
Date Created By Author	2017-10
Date Added To Library	2025-06