LM4864 - 300 mW Audio Power Amplifier with Shutdown Mode

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.

Products containing the "LM4864" keyword are: LM4864 , LM4864LD , LM4864LD/NOPB , LM4864LDX , LM4864M , LM4864M/NOPB , LM4864MM , LM4864MM , LM4864MM NOPB , LM4864MM(Z64) , LM4864MM/NOPB , LM4864MM/NOPB , LM4864MMX , LM4864MMX , AP4306AKTR-G , LM4864MMX(Z64) , LM4864MMX/NOPB , LM4864MMX/NOPB , LM4864MNOPB , LM4864MX , LM4864MX/NOPB

• 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

• P_O at 1% THD+N with V_DD = 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)

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