LM4927SD

• Fully differential amplification
• In the available space saving microarray LLP package
• Ultra-low current shutdown mode
• Drives capacitive loads up to 100pF
• Improved pop-and-click circuitry eliminates turn-on noise and turn-off transitions
• 2.4 - 5.5V operation
• No output coupling capacitors, buffer networks, or bootstrap capacitors required

illustrate

The LM4927 is a fully differential audio power amplifier designed primarily for demanding applications in mobile phones and other portable communications devices. It is capable of delivering 2.5 watts of continuous power of 4 Load less than 10% distortion (THD+N) from one_{5V DC}Power supply.

Boomer audio power amplifiers are designed to provide high quality output power with very few external components. The LM4927 does not require output coupling capacitors or starting capacitors, making it ideal for use in mobile phones and other low voltage applications where minimum power consumption is a major requirement.

The LM4927 has a low-power shutdown mode. To facilitate this work, shutdown enables logic low. In addition, the LM4927 has an internal thermal shutdown protection mechanism.

The LM4927 includes advanced POP and click-and-click noise cancellation circuitry that would otherwise occur when switching on and off.

Main specifications

Improved PSRR at 217Hz	85 dB (typical)
The output power is at 5.0V @ 10%THD(4 ）	2.5W (typical)
The output power is 3.3V @ 1% THD	550MW (typical)
Shutdown current	0.1μA (typical)

apply

• cell phone
• Pocket PC
• Portable electronic devices