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音訊、觸覺和壓電
音訊放大器
通用型音訊放大器

TPA3255

現行

315W 立體聲道、600W 單聲道、18 至 53.5V 電源、類比輸入 D 類音訊放大器

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產品規格表

TPA3255

現行
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產品詳細資料

Audio input type Analog Input Architecture Class-D Speaker channels (max) 4 Control interface Hardware Output power (W) 315 Power stage supply (max) (V) 53.5 Power stage supply (min) (V) 18 THD + N at 1 kHz (%) 0.006 Load (min) (Ω) 2 Analog supply voltage (min) (V) 10.8 Analog supply voltage (max) (V) 13.2 Rating Catalog Operating temperature range (°C) 0 to 70
Audio input type Analog Input Architecture Class-D Speaker channels (max) 4 Control interface Hardware Output power (W) 315 Power stage supply (max) (V) 53.5 Power stage supply (min) (V) 18 THD + N at 1 kHz (%) 0.006 Load (min) (Ω) 2 Analog supply voltage (min) (V) 10.8 Analog supply voltage (max) (V) 13.2 Rating Catalog Operating temperature range (°C) 0 to 70
HTSSOP (DDV) 44 113.4 mm² (14 mm × 8.1 mm)
  • Differential Analog Inputs
  • Total Output Power at 10%THD+N
    • 315-W Stereo into 4 Ω in BTL Configuration
    • 185-W Stereo into 8 Ω in BTL Configuration
    • 600-W Mono into 2 Ω in PBTL Configuration
  • Total Output Power at 1%THD+N
    • 260-W Stereo into 4 Ω in BTL Configuration
    • 150-W Stereo into 8 Ω in BTL Configuration
    • 480-W Mono into 2 Ω in PBTL Configuration
  • Advanced Integrated Feedback Design with High-speed Gate Driver Error Correction
    (PurePath™ Ultra-HD)
    • 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
  • EMI Compliant When Used With Recommended System Design
  • Differential Analog Inputs
  • Total Output Power at 10%THD+N
    • 315-W Stereo into 4 Ω in BTL Configuration
    • 185-W Stereo into 8 Ω in BTL Configuration
    • 600-W Mono into 2 Ω in PBTL Configuration
  • Total Output Power at 1%THD+N
    • 260-W Stereo into 4 Ω in BTL Configuration
    • 150-W Stereo into 8 Ω in BTL Configuration
    • 480-W Mono into 2 Ω in PBTL Configuration
  • Advanced Integrated Feedback Design with High-speed Gate Driver Error Correction
    (PurePath™ Ultra-HD)
    • 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
  • EMI Compliant When Used With Recommended System Design

TPA3255 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 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.

TPA3255 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 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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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 TPA3255 315-W Stereo, 600-W Mono PurePath™ Ultra-HD Analog-Input datasheet (Rev. A) PDF | HTML 2016/10/4
應用說明 LC Filter Design (Rev. B) PDF | HTML 2026/6/29
Application brief Speaker, TV, Soundbar Audio Amplifiers: Features, Benefits, and Selection Guide PDF | HTML 2026/3/11
應用說明 Class-D Amplifier External Load Diagnostics (Rev. A) PDF | HTML 2025/7/17
應用說明 Power Amplifiers for Constant Voltage Audio Systems PDF | HTML 2022/9/6
應用說明 TPA324x and TPA325x Post-Filter Feedback (Rev. A) 2018/3/7
更多文件說明 High-Power Audio Amplifiers TPA322x/4x/5x 2017/12/1
應用說明 Multi-Device Configuration for TPA32xx Amplifiers 2017/9/27
技術文章 Professional audio equipment made the most noise at the 2017 NAMM Show PDF | HTML 2017/3/14
更多文件說明 TI Automotive External Amplifiers (Rev. A) 2017/2/3
更多文件說明 TI Powered Speakers (Rev. A) 2017/1/31
應用說明 TPA32xx Analog Input Grounding for Single Ended Inputs PDF | HTML 2016/8/26
更多文件說明 High-Power Audio Amplifiers 2016/7/14
技術文章 How Class-D amplifiers are closing the gap on hi-res Class-AB amplifiers PDF | HTML 2016/4/1

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

SIDEGIG-GUITAREVM — Guitar SideGig 插入式模組

TI Guitar SideGig 外掛模組可將 TI 的音訊 D 類放大器 EVM 轉變為吉他、貝斯或樂器擴音器。此電路板具備可選擇的「乾淨」與「驅動」聲道，可用於傳統或過驅動的吉他音色。乾淨聲道提供音量、高音、中音、低音控制，並具備中頻提升開關以調整樂器音色。驅動聲道提供額外的驅動、音色與音量控制，以塑造過驅動音效特性。  使用 ¼ 吋單聲道輸入插孔以支援標準樂器導線。

使用指南: PDF
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開發板

SIDEGIG-PROTOEVM — 原型音訊外掛程式模組

TI 原型音訊外掛程式模組可將 TI 音訊 D 類放大器 EVM 變為您的沙箱。如要使用 TI D 類 EVM 製作前置放大器電路原型或測試運算放大器，需要從 DIY 音訊外掛程式模組開始。

開始在隨附的模擬板上製作原型，或直接使用穿孔板點陣圖焊接到 PCB 上。所有 D 類輸入和輸出皆可供您自由連接。使用 TI D 類放大器 EVM 打造任何想要的音訊甚至非音訊電路。
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開發板

SIDEGIG-XOVEREVM — 類比、主動交叉音訊外掛程式模組

TI 類比主動交越音訊外掛程式模組可將 TI 音訊 D 類放大器 EVM 轉變為高品質的雙向喇叭放大器。  此隨插即用模組可輕鬆移除被動式喇叭中昂貴的大型被動交越，並建立效率更高，體積更小的雙放大雙向系統。電路板配備可調高通濾波器、低通濾波器、擋板步進及延遲，可為高音揚聲器和低音揚聲器建立兩個音訊輸出訊號。   設計主動式喇叭有許多優勢，包括完美匹配且調諧的音訊。   從類比主動交越音訊外掛程式模組開始，打造您的新一代喇叭設計！
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程式碼範例或展示

SLAC733 — TPA3255 Setup Guide & Configuration Tool

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計算工具

LCFILTER-CALC-TOOL — Class-D LC Filter Designer

使用 D 類 LC 濾波器設計工具，在幾分鐘內計算與設計音訊 D 類 LC 濾波器。  根據 D 類輸出、切換拓撲與性能，從 4 種不同的濾波器類型中選擇。  輸入角頻率與品質 (Q) 因數以微調音訊頻率響應。  最後，使用頻率響應圖與 Q 因數計算，驗證所選 LC 元件與多個揚聲器負載的匹配。  D 類 LC 濾波器設計工具是啟動下一個 D 類音訊設計的完美快速簡易工具！
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參考設計

PMP10215 — 適用於 D 類音訊放大器的通用輸入至 3.3V、12V、36V、200W 連續 PSU 參考設計

此電源模組可產生所有電壓，為 D 類音訊放大器供電。主輸出電壓為 36V，可持續提供 200W 與 840W 峰值。第一個級是功率因數校正升壓。返馳式轉換器在一次側提供 12V，在二次側提供 12V (300mA) 和 3.3V (200mA)。硬體開關 + 遠端輸入可讓轉換器進入待機模式：在此狀態下，36V 輸出停用，而 12V 和 3.3V 為「常開」。如此一來，待機功率便可降至 150mW@115Vac 和 270mW@230Vac。第二個數位輸入可將主輸出電壓從 36V 切換為 18V，當音訊放大器所需功率較低時，可進入低電流消耗模式。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (DDV) 44 Ultra Librarian
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