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300 mW Audio Power Amplifier with Shutdown Mode


Package | PIN: SOIC (D) | 8
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $1.17
10-24 $1.04
25-99 $0.97
100-249 $0.83
250-499 $0.76
500-749 $0.62
750-999 $0.50
1000+ $0.44


  • VSSOP, SOIC, PDIP, and WSON Packaging
  • No Output Coupling Capacitors, Bootstrap Capacitors, or Snubber Circuits are Necessary
  • Thermal Shutdown Protection Circuitry
  • Unity-Gain Stable
  • External Gain Configuration Capability

Key Specifications

  • PO at 1% THD+N with VDD = 5V, 1kHz
    • LM4864LD, 4Ω load 625 mW (typ)
    • LM4864LD, 8Ω load 725 mW (typ)
    • LM4864M & LM4864N, 8Ω load 675 mW (typ)
    • LM4864MM, 8Ω load 300 mW (typ)
    • LM4864, 16Ω load 550 mW (typ)
    • Shutdown current 0.7 µA (typ)

All trademarks are the property of their respective owners. Boomer is a trademark of Texas Instruments.

Texas Instruments  LM4864M/NOPB

The LM4864 is a bridged audio power amplifier capable of delivering 725mW of continuous average power into an 8Ω load with 1% THD+N from a 5V power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power from a low supply voltage while requiring a minimal amount of external components. Since the LM4864 does not require output coupling capacitors, bootstrap capacitors or snubber networks, it is optimally suited for low-power portable applications.

The LM4864 features an externally controlled, low power consumption shutdown mode, and thermal shutdown protection.

The closed loop response of the unity-gain stable LM4864 can be configured by external gain-setting resistors. The device is available in multiple package types to suit various applications.