首頁 音訊 音訊放大器 喇叭放大器
首頁
音訊
音訊放大器
喇叭放大器

LM4946

現行

具 I2C 控制介面 540-mW 單聲道 35-mW 立體聲道類比輸入 AB 類音訊放大器

立即訂購
產品規格表

LM4946

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 85
Rating Catalog Operating temperature range (°C) -40 to 85
WQFN (RTW) 24 16 mm² 4 x 4

  • I 2 C/SPI Control Interface
  • I 2 C/SPI programmable National 3D Audio
  • I 2 C/SPI controlled 32 step digital volume control (-54dB to +18dB)
  • Three independent volume channels (Left, Right, Mono)
  • Eight distinct output modes
  • LLP and microSMD surface mount packaging
  • “Click and Pop” suppression circuitry
  • Thermal shutdown protection
  • Low shutdown current (0.02uA, typ)
  • RF immunity topology
    •

  • I 2 C/SPI Control Interface
  • I 2 C/SPI programmable National 3D Audio
  • I 2 C/SPI controlled 32 step digital volume control (-54dB to +18dB)
  • Three independent volume channels (Left, Right, Mono)
  • Eight distinct output modes
  • LLP and microSMD surface mount packaging
  • “Click and Pop” suppression circuitry
  • Thermal shutdown protection
  • Low shutdown current (0.02uA, typ)
  • RF immunity topology
    •

    The LM4946 is an audio power amplifier capable of delivering 540mW of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N, 35mW per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, or an output capacitor-less (OCL) configuration with identical specifications as the SE configuration, from a 3.3V power supply.

    The LM4946 has three input channels: one pair for a two-channel stereo signal and the third for a differential single-channel mono input. The LM4946 features a 32-step digital volume control and eight distinct output modes. The digital volume control, 3D enhancement, and output modes (mono/SE/OCL) are programmed through a two-wire I 2C or a three-wire SPI compatible interface that allows flexibility in routing and mixing audio channels.

    The LM4946 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only seven external components in the OCL mode (two additional components in SE mode).

    Key Specifications

    ■  THD+N at 1kHz, 540mW  into 8Ω BTL (3.3V) 1.0% (typ)
    ■  THD+N at 1kHz, 35mW  into 32Ω SE (3.3V) 1.0% (typ)
    ■  Single Supply Operation (VDD) 2.7 to 5.5V
    ■   I 2C/SPI Single Supply Operation  
       LLP 2.2 to 5.5V
       micro SMD 1.7 to 5.5V

    The LM4946 is an audio power amplifier capable of delivering 540mW of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N, 35mW per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, or an output capacitor-less (OCL) configuration with identical specifications as the SE configuration, from a 3.3V power supply.

    The LM4946 has three input channels: one pair for a two-channel stereo signal and the third for a differential single-channel mono input. The LM4946 features a 32-step digital volume control and eight distinct output modes. The digital volume control, 3D enhancement, and output modes (mono/SE/OCL) are programmed through a two-wire I 2C or a three-wire SPI compatible interface that allows flexibility in routing and mixing audio channels.

    The LM4946 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only seven external components in the OCL mode (two additional components in SE mode).

    Key Specifications

    ■  THD+N at 1kHz, 540mW  into 8Ω BTL (3.3V) 1.0% (typ)
    ■  THD+N at 1kHz, 35mW  into 32Ω SE (3.3V) 1.0% (typ)
    ■  Single Supply Operation (VDD) 2.7 to 5.5V
    ■   I 2C/SPI Single Supply Operation  
       LLP 2.2 to 5.5V
       micro SMD 1.7 to 5.5V

    filter 尋找其它 喇叭放大器
    下載 觀看有字幕稿的影片 影片

    技術文件

    star =TI 所選的此產品重要文件
    找不到結果。請清除您的搜尋條件，然後再試一次。
    檢視所有 2
    類型 標題 日期
    * Data sheet LM4946 Output Capacitor-Less Audio Subsystem with Programmable TI 3D datasheet (Rev. E) 2007年 8月 1日
    Application note AN-1496 Noise, TDMA Noise, and Suppression Techniques (Rev. D) 2013年 5月 1日

    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)。

    模擬工具

    PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

    PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

    PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。 

    在 PSpice for TI 設計與模擬工具中，您可以搜尋 TI (...)
    要求
    封裝 針腳 CAD 符號、佔位空間與 3D 模型
    WQFN (RTW) 24 Ultra Librarian
    適用 TI 的評估品項標準條款與條件。

    訂購與品質

    內含資訊：
    • RoHS
    • REACH
    • 產品標記
    • 鉛塗層/球物料
    • MSL 等級/回焊峰值
    • MTBF/FIT 估算值
    • 材料內容
    • 認證摘要
    • 進行中持續性的可靠性監測
    內含資訊：
    • 晶圓廠位置
    • 組裝地點

    支援與培訓

    內含 TI 工程師技術支援的 TI E2E™ 論壇

    以英文檢視所有論壇主題

    內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

    若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

    影片