text.skipToContent text.skipToNavigation


Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain

Qty Price
1-9 $2.28
10-24 $2.05
25-99 $1.91
100-249 $1.67
250-499 $1.57
500-749 $1.33
750-999 $1.13
1000+ $1.08


  • 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.

Texas Instruments  LM4938MH/NOPB

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.