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LM4938

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具有 DC 音量控制和可选增益的立体声 2W 音频功率放大器

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LM4938

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产品详情

Audio input type Analog Input Architecture Class-AB Speaker channels (max) Stereo Rating Catalog Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.7 Load (min) (Ω) 3 Output power (W) 2.2 THD + N at 1 kHz (%) 0.05 Iq (typ) (mA) 11 Control interface GPIO Closed/open loop Open Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 PSRR (dB) 78 Operating temperature range (°C) -20 to 85
Audio input type Analog Input Architecture Class-AB Speaker channels (max) Stereo Rating Catalog Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.7 Load (min) (Ω) 3 Output power (W) 2.2 THD + N at 1 kHz (%) 0.05 Iq (typ) (mA) 11 Control interface GPIO Closed/open loop Open Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 PSRR (dB) 78 Operating temperature range (°C) -20 to 85
HTSSOP (PWP) 28 62.08 mm² 9.7 x 6.4
  • 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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* 数据表 LM4938 Stereo 2W Audio Pwr Amp w/DC Vol Cntrl & Selectable Gain 数据表 (Rev. B) 2013年 5月 1日

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  • MSL 等级/回流焊峰值温度
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