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TPA6404-Q1

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Automotive, 45-W, 2-MHz, 4-ch 4.5- to 18-V supply analog input Class-D audio amplifier w/ load dump

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Data sheet

TPA6404-Q1

ACTIVE
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Product details

Output power (W) 45 Power stage supply (max) (V) 18 Power stage supply (min) (V) 4.5 Speaker channels (max) 4 Features thermal pad up Audio input type Analog Input Control interface I2C THD + N at 1 kHz (%) 0.01 Switching frequency (max) (Hz) 2100000 Output noise voltage (µV) 42 Rating Automotive Operating temperature range (°C) -40 to 125
Output power (W) 45 Power stage supply (max) (V) 18 Power stage supply (min) (V) 4.5 Speaker channels (max) 4 Features thermal pad up Audio input type Analog Input Control interface I2C THD + N at 1 kHz (%) 0.01 Switching frequency (max) (Hz) 2100000 Output noise voltage (µV) 42 Rating Automotive Operating temperature range (°C) -40 to 125
HSSOP (DKQ) 56 190.647 mm² (18.42 mm × 10.35 mm)
  • Advanced load diagnostics
    • AC diagnostic for tweeter detection with impedance and phase response
    • Integrated sine wave generator
  • Easy to meet CISPR25-L5 EMC specification
  • AEC-Q100 Qualified for automotive applications:
    • Temperature Grade 1: –40°C to 125°C TA
    • Device HBM ESD classification level: 3A
    • Device CDM ESD classification level: C4B
  • Audio Inputs
    • 4 Channel differential analog input
    • Four I2C-controlled gain options
    • High input impedance for low value AC-coupling capacitor
  • Audio outputs
    • Four-channel Bridge-tied load (BTL), with option of parallel BTL (PBTL)
    • Up to 2.1 MHz Output switching frequency
    • 27 W, 10% THD into 4Ω at 14.4V
    • 45W, 10% THD into 2Ω at 14.4V
    • 85W, 10% THD into 1Ω at 14.4V PBTL
  • Audio performance into 4Ω at 14.4V, 1kHz
    • THD+N < 0.01%
    • 42µVRMS Output noise
    • - 90dB Crosstalk
  • Load Diagnostics
    • Output open and shorted load
    • Output-to-battery or ground shorts
    • Line output detection up to 6kΩ
    • Runs without input clocks
  • Protection
    • Output current limiting
    • Output short protection
    • 40V Load dump
    • Fortuitous Open ground and power tolerant
    • DC Offset
    • Over temperature
    • Undervoltage and overvoltage
  • General operation
    • 4.5V to 18V supply voltage
    • I2C Control With 4 Address Options
    • Clip Detection and Thermal Foldback
  • Advanced load diagnostics
    • AC diagnostic for tweeter detection with impedance and phase response
    • Integrated sine wave generator
  • Easy to meet CISPR25-L5 EMC specification
  • AEC-Q100 Qualified for automotive applications:
    • Temperature Grade 1: –40°C to 125°C TA
    • Device HBM ESD classification level: 3A
    • Device CDM ESD classification level: C4B
  • Audio Inputs
    • 4 Channel differential analog input
    • Four I2C-controlled gain options
    • High input impedance for low value AC-coupling capacitor
  • Audio outputs
    • Four-channel Bridge-tied load (BTL), with option of parallel BTL (PBTL)
    • Up to 2.1 MHz Output switching frequency
    • 27 W, 10% THD into 4Ω at 14.4V
    • 45W, 10% THD into 2Ω at 14.4V
    • 85W, 10% THD into 1Ω at 14.4V PBTL
  • Audio performance into 4Ω at 14.4V, 1kHz
    • THD+N < 0.01%
    • 42µVRMS Output noise
    • - 90dB Crosstalk
  • Load Diagnostics
    • Output open and shorted load
    • Output-to-battery or ground shorts
    • Line output detection up to 6kΩ
    • Runs without input clocks
  • Protection
    • Output current limiting
    • Output short protection
    • 40V Load dump
    • Fortuitous Open ground and power tolerant
    • DC Offset
    • Over temperature
    • Undervoltage and overvoltage
  • General operation
    • 4.5V to 18V supply voltage
    • I2C Control With 4 Address Options
    • Clip Detection and Thermal Foldback

The TPA6404-Q1 device is a four-channel analog-input Class-D audio amplifier that implements a 2.1MHz PWM switching frequency that enables a cost optimized solution in a very small 4.5cm2 PCB size, full operation down to 4.5V for start/stop events, and exceptional sound quality with up to 100kHz audio bandwidth.

The TPA6404-Q1 Class-D audio amplifier has an optimal design for use in entry level automotive head units that provide analog audio input signals as part of their system design.

The Class-D topology dramatically improves efficiency over traditional linear amplifier solutions.

The output switching frequency operates above the AM band, which eliminates the AM band interference and reduces the output filter size and cost.

The device is offered in a 56 pin HSSOP package with the exposed thermal pad up.

The TPA6404-Q1 device is a four-channel analog-input Class-D audio amplifier that implements a 2.1MHz PWM switching frequency that enables a cost optimized solution in a very small 4.5cm2 PCB size, full operation down to 4.5V for start/stop events, and exceptional sound quality with up to 100kHz audio bandwidth.

The TPA6404-Q1 Class-D audio amplifier has an optimal design for use in entry level automotive head units that provide analog audio input signals as part of their system design.

The Class-D topology dramatically improves efficiency over traditional linear amplifier solutions.

The output switching frequency operates above the AM band, which eliminates the AM band interference and reduces the output filter size and cost.

The device is offered in a 56 pin HSSOP package with the exposed thermal pad up.
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Technical documentation

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* Data sheet TPA6404-Q1 45W,​​​ 2MHz Analog Input 4 -Channel Automotive Class-D Audio Amplifier with Load Dump Protection and I2 C Diagnostics datasheet (Rev. B) PDF | HTML Jan 15, 2025
Application brief Diagnostics and Protections in Automotive Audio Systems (Rev. A) Sep 24, 2019
Application note Inductor Selection Guide for 2.1 MHz Class-D Amplifiers (Rev. A) PDF | HTML Sep 5, 2019
Technical article Why you should use a Class-D audio amplifier in your automotive infotainment syste PDF | HTML Jan 8, 2018

Design & development

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Evaluation board

TPA6404Q1EVM — TPA6404-Q1 50-W, 2-MHz Analog Input 4-Channel Automotive Class-D Audio Amplifier Evaluation Module

The TPA6404Q1EVM evaluation module (EVM) demonstrates the TPA6404-Q1 integrated circuit from Texas Instruments. The TPA6404-Q1 device is a four-channel analog-input Class-D audio amplifier that implements a 2.1 MHz PWM switching frequency that enables a cost optimized solution in a very small PCB (...)

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Application software & framework

PUREPATHCONSOLE — PurePath™ Console graphical development suite for audio system design and development

PurePath™ Console is a highly integrated and easy-to-use audio development suite designed specifically to simplify the evaluation, configuration and debug process associated with the development of audio products. Watch how easy it is to use the PurePath™ Console 3 software.

PurePath Console’s (...)
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TPA6404-Q1 IBIS Model

SLOM440.ZIP (23 KB) - IBIS model
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HSSOP (DKQ) 56 Ultra Librarian
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