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音訊、觸覺和壓電
音訊放大器
通用型音訊放大器

LM4938

現行

具 DC 音量控制和可選增益的立體聲道 2W 音訊功率放大器

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產品規格表

LM4938

現行
產品規格表 立即訂購

產品詳細資料

Audio input type Analog Input Architecture Class-AB Speaker channels (max) Stereo Control interface GPIO Output power (W) 2.2 Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.7 THD + N at 1 kHz (%) 0.05 Load (min) (Ω) 3 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 Rating Catalog Operating temperature range (°C) -20 to 85
Audio input type Analog Input Architecture Class-AB Speaker channels (max) Stereo Control interface GPIO Output power (W) 2.2 Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.7 THD + N at 1 kHz (%) 0.05 Load (min) (Ω) 3 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 Rating Catalog Operating temperature range (°C) -20 to 85
HTSSOP (PWP) 28 62.08 mm² (9.7 mm × 6.4 mm)
  • Improved Click and Pop Circuitry Virtually Eliminates Noise During Turn On/Off Transitions
  • DC Volume Control Interface
  • System Beep Detect
  • Stereo Switchable Bridged/Single-Ended Power Amplifiers
  • Selectable Internal/External Gain and Bass Boost
  • Thermal Shutdown Protection Circuitry
  • Unity Gain Stable

Key Specifications

  • PO at 1% THD+N
    • into 3Ω: 2.2W (typ)
    • into 4Ω: 2.0W (typ)
    • into 8Ω: 1.3W (typ)
  • Single-ended mode
    • THD+N at 92mW into 32Ω: 1.0% (typ)
  • Shutdown Current: 0.5µA (typ)

All trademarks are the property of their respective owners.

  • Improved Click and Pop Circuitry Virtually Eliminates Noise During Turn On/Off Transitions
  • DC Volume Control Interface
  • System Beep Detect
  • Stereo Switchable Bridged/Single-Ended Power Amplifiers
  • Selectable Internal/External Gain and Bass Boost
  • Thermal Shutdown Protection Circuitry
  • Unity Gain Stable

Key Specifications

  • PO at 1% THD+N
    • into 3Ω: 2.2W (typ)
    • into 4Ω: 2.0W (typ)
    • into 8Ω: 1.3W (typ)
  • Single-ended mode
    • THD+N at 92mW into 32Ω: 1.0% (typ)
  • Shutdown Current: 0.5µA (typ)

All trademarks are the property of their respective owners.

The LM4938 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4Ω with less than 1.0% THD or 2.2W into 3Ω with less than 1.0% THD.

Boomer audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4938 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications.

The LM4938 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance.

Note 1: When properly mounted to the circuit board, LM4938MH will deliver 2W into 4Ω. See Application Information section for more information.

Note 2: An LM4938MH that has been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3Ω.

The LM4938 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4Ω with less than 1.0% THD or 2.2W into 3Ω with less than 1.0% THD.

Boomer audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4938 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications.

The LM4938 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance.

Note 1: When properly mounted to the circuit board, LM4938MH will deliver 2W into 4Ω. See Application Information section for more information.

Note 2: An LM4938MH that has been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3Ω.
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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 LM4938 Stereo 2W Audio Pwr Amp w/DC Vol Cntrl & Selectable Gain datasheet (Rev. B) 2013/5/1

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