TPA3255-Q1 315W-stereo / 600W-Mono Ultra-HD Analog-Input Automotive Class-D Amplifier | TI.com

TPA3255-Q1 (ACTIVE) 315W-stereo / 600W-Mono Ultra-HD Analog-Input Automotive Class-D Amplifier

 

Description

TPA3255-Q1 is a high performance class-D power amplifier that enables true premium sound quality with class-D efficiency. It features an advanced integrated feedback design and proprietary high-speed gate driver error correction (PurePath™ Ultra-HD). This technology allows ultra low distortion across the audio band and superior audio quality. The device is operated in AD-mode, and can drive up to 2 x 315 W into 4-Ω load at 10% THD and 2 x 150 W unclipped into 8-Ω load and features a 2-VRMS analog input interface that works seamlessly with high performance DACs such as TI’s PCM5242. In addition to excellent audio performance, TPA3255-Q1 achieves both high power efficiency and very low power stage idle losses below 2.5W. This is achieved through the use of 85-mΩ MOSFETs and an optimized gate driver scheme that achieves significantly lower idle losses than typical discrete implementations.

Features

  • AEC-Q100 Qualified for Automotive Applications
    • Temperature Grade 2: –40°C to +105°C, TA
  • Differential Analog Inputs
  • Total Output Power at 10% THD+N
    • 315-W Stereo into 4 Ω in BTL Configuration
    • 180-W Stereo into 8 Ω in BTL Configuration
    • 600-W Mono into 2 Ω in PBTL Configuration
  • Total Output Power at 1% THD+N
    • 255-W Stereo into 4 Ω in BTL Configuration
    • 150-W Stereo into 8 Ω in BTL Configuration
    • 495-W Mono into 2 Ω in PBTL Configuration
  • Advanced Integrated Feedback Design with High-speed Gate Driver Error Correction
    • Signal Bandwidth up to 100 kHz for High Frequency Content From HD Sources
    • Ultra Low 0.006% THD+N at 1 W into 4 Ω and <0.01% THD+N to Clipping
    • >65 dB PSRR (BTL, 1 kHz, No Input Signal)
    • <85 µV (A-Weighted) Output Noise
    • >111 dB (A Weighted) SNR
  • Multiple Configurations Possible:
    • Stereo, Mono, 2.1 and 4xSE
  • Click and Pop Free Startup and Stop
  • 90% Efficient Class-D Operation (4 Ω)
  • Wide 18-V to 53.5V Supply Voltage Operation
  • Self-Protection Design (Including Undervoltage, Overtemperature, Clipping, and Short Circuit Protection) With Error Reporting

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Parametrics

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Part number Order Audio input type Architecture Speaker channels (Max) Power stage supply (Min) (V) Power stage supply (Max) (V) Output power (W) Load (Min) (ohms) SNR (dB) THD + N @ 1 kHz (%) Iq (Typ) (mA) Control interface Closed/open loop Analog supply (Min) (V) Analog supply (Max) (V) Power to parallel bridge tied load (Max) (W) PSRR (dB) Operating temperature range (C) Rating
TPA3255-Q1 Order now Analog Input     Class-D     4     18     53.5     315     2     112     0.006     34     Hardware     Closed     9.8     11.4     605       -40 to 105     Automotive    
TPA6404-Q1 Order now Analog Input     Class-D     4     4.5     18     45     2       0.01       I2C     Closed     4.5     18     85     75     -40 to 125     Automotive