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TI(德州仪器) LM4864
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  • TI(德州仪器) LM4864
  • TI(德州仪器) LM4864
  • TI(德州仪器) LM4864
  • TI(德州仪器) LM4864
  • TI(德州仪器) LM4864
  • TI(德州仪器) LM4864
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LM4864

LM4864

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725mW 单声道、模拟输入 AB 类音频放大器

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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.

  • 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.

Audio input typeAnalog Input
ArchitectureClass-AB
Speaker channels (max)Mono
RatingCatalog
Power stage supply (max) (V)5.5
Power stage supply (min) (V)2.7
Load (min) (Ω)4
Output power (W)0.85
THD + N at 1 kHz (%)0.7
Iq (typ) (mA)3.6
Control interfaceHardware
Closed/open loopOpen
Analog supply (min) (V)2.7
Analog supply voltage (max) (V)5.5
PSRR (dB)50
Operating temperature range (°C)-40 to 85
SOIC (D)829.4 mm² 4.9 x 6
VSSOP (DGK)814.7 mm² 3 x 4.9
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