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L4991 데이터시트

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L4991 3W Audio Power Amplifier with Shutdown Mode TI
Texas Instruments TI
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DESCRIPTION
The LM4991 is a mono bridged audio power amplifier capable of delivering 3W of continuous average power into a 3Ω load with less than 10% THD when powered by a 5V power supply (see Note below). To conserve power in portable applications, the LM4991s micropower shutdown mode (ISD = 0.1µA, typ) is activated when VDD is applied to the SHUTDOWN pin.

FEATURES
• Available in Space-Saving WSON and SOIC Packages
• Ultra Low Current Shutdown Mode
• Can Drive Capacitive Loads up to 500pF
• Improved Click and Pop Circuitry Reduces Noises During Turn-On and Turn-Off Transitions
• 2.2 - 5.5V Operation
• No Output Coupling Capacitors, Snubber Networks, Bootstrap Capacitors or Gain-Setting Resistors Required
• Unity-Gain Stable

APPLICATIONS
• Wireless and Cellular Handsets
• PDAs
• Portable Computers
• Desktop Computers

 

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