LM4929 - LM4929 Stereo 40mW Low Noise Headphone Amplifier with OCL Output

The LM4929 is an stereo audio power amplifier capable of delivering 40mW per channel of continuous average power into a 16Ω load or 25mW per channel into a 32Ω load at 1% THD+N from a 3V power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4929 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The LM4929 is configured for OCL (Output Capacitor-Less) outputs, operating with no DC blocking capacitors on the outputs.

The LM4929 features a low-power consumption shutdown mode with a faster turn on time. Additionally, the LM4929 features an internal thermal shutdown protection mechanism.

The LM4929 is unity gain stable and may be configured with external gain-setting resistors.

Products containing the "LM4929" keyword are: LM4929MM , LM4929MM/NOPB , LM4929MM/NOPB , LM4929MMBD , LM4929MMX , LM4929MMX /NOPB , LM4929MMX/NOPB , LM4929MMX/NOPB

• OCL outputs — No DC Blocking Capacitors
• External Gain-Setting Capability
• Available in Space-Saving VSSOP Package
• Ultra Low Current Shutdown Mode
• 2V - 5.5V Operation
• Ultra Low Noise

Key Specifications

• PSRR at 217Hz and 1kHz
• Output Power at 1kHz with V_DD = 2.4V,
  1% THD+N into a 16Ω load, 65dB (Typ)
• Output Power at 1kHz with V_DD = 3V,
  1% THD+N into a 16Ω load, 25 mW (Typ)
• Shutdown current, 40 mW (Typ), 2.0µA (Max)
• Output Voltage change on release
  from Shutdown V_DD = 2.4V, R_L = 16Ω, 1mV (Max)

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