TPA3255-Q1

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Automotive, 315-W, 2-ch, 18- to 53.5-V supply analog input Class-D audio amplifier

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Product details

Parameters

Audio input type Analog Input Architecture Class-D Speaker channels (Max) 4 Power stage supply (Max) (V) 53.5 Power stage supply (Min) (V) 18 Load (Min) (ohms) 2 Output power (W) 315 SNR (dB) 112 THD + N @ 1 kHz (%) 0.006 Iq (Typ) (mA) 34 Control interface Hardware Closed/open loop Closed Analog supply (Min) (V) 9.8 Analog supply (Max) (V) 11.4 Power to parallel bridge tied load (Max) (W) 605 PSRR (dB) 65 Operating temperature range (C) -40 to 105 open-in-new Find other Speaker amps

Package | Pins | Size

HTSSOP (DDV) 44 113 mm² 14 x 8.1 open-in-new Find other Speaker amps

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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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.

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Technical documentation

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Type Title Date
* Datasheet TPA3255-Q1 315-W Stereo, 600-W mono PurePath™ ultra-HD analog-input datasheet (Rev. A) Mar. 15, 2019
Application notes TPA324x and TPA325x Post-Filter Feedback (Rev. A) Mar. 07, 2018
Application notes Multi-Device Configuration for TPA32xx Amplifiers Sep. 27, 2017
More literature TI Automotive External Amplifiers (Rev. A) Feb. 03, 2017
Application notes Class-D Amplifier External Load Diagnostics Jan. 23, 2017
Application notes LC Filter Design (Rev. A) Nov. 09, 2016
Application notes TPA32xx Analog Input Grounding for Single Ended Inputs Aug. 26, 2016

Design & development

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Hardware development

EVALUATION BOARDS Download
document-generic User guide
$149.00
Description
The TPA3255EVM Ultra-HD evaluation module demonstrates the TPA3255DDV integrated circuit from Texas Instruments. The TPA3255DDV is a high-performance Class-D amplifier that enables true premium sound quality with high efficiency class-D technology. It features an advanced integrated feedback design (...)
Features
  • Stereo Ultra-HD evaluation module
  • Self-contained protection system (short circuit, clip and thermal)
  • Standard 2 VRMS differential input  or single ended line input
  • BTL, PBTL and SE output configurations support
  • Double-sided, plated-through, 2oz. Cu 2 layer PCB layout

CAD/CAE symbols

Package Pins Download
HTSSOP (DDV) 44 View options

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