LM4917SD

• Ground reference output
• High PSRR
• Space-saving TSSOP package
• Ultra-low current shutdown mode
• Improved pop-up click circuitry eliminates the noise of turning on and turn-on transitions
• 1.4 - 3.6V operation
• No output coupling capacitors, buffer networks, bootstrap capacitors
• Turn off the independence of either channel

illustrate

The LM4917 is a stereo output capacitor headphone amplifier capable of delivering a continuous average power of 95mW for a 16Ω load with less than 1% THD+N from a single 3V supply.

The LM4917 provides high-quality audio reproduction with minimal external components. A ground reference output eliminates the output coupled capacitors typically required by single-ended loads, reducing component count, cost, and board space consumption. This makes the premium for board space for mobile phones and other portable devices ideal for the LM4917. The elimination of output coupling capacitors also improves the low-frequency response.

The LM4917 operates from a single 1.4V to 3.6V supply with 0.02% lower THD+N and a PSRR of 70 dB. Independent left/right channel low-power shutdown control provides power-saving flexibility for mono/stereo applications. Advanced click suppression eliminates the transient noise heard during startup and shutdown. Short circuit and thermal overload protection protect the equipment in fault conditions.

Key specifications:

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• laptop
• desktop computer
• mobile phone
• handheld computer
• Portable electronic devices