ECL4890-Low-Cost, Mono/Stereo, 1 W Differential Audio Power Amplifiers

General Description

The ELN4890 is an audio power amplifier primarily designed  for  demanding  applications  in  mobile  phones  and  other  portable  communication  device  applications.  It  is  capable  of delivering 1 watt of continuous average power to an 8Ω  BTL load with less than 1% distortion (THD+N) from a 5V DC  power  supply.  Boomer  audio  power  amplifiers  were  designed  specifically  to  provide  high  quality  output  power  with   a   minimal   amount   of   external   components.   The ELN4890  does  not  require  output  coupling  capacitors  or bootstrap  capacitors,  and  therefore  is  ideally  suited  for mobile  phone  and  other  low  voltage  applications  where minimal power consumption is a primary requirement. The ELN4890 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic  low.  Additionally,  the ELN4890  features  an  internal thermal   shutdown   protection   mechanism.   The   ELN4890  contains  advanced  pop  &  click  circuitry  which  eliminates

noises  which  would  otherwise  occur  during  turn-on  and  turn-off  transitions.  The  ELN4890  is  unity-gain  stable  and  can be configured by external gain-setting resistors.

Features

◆Available in space-saving packages

◆Ultra low current shutdown mode

◆BTL output can drive capacitive loads

◆Improved   pop   &   click   circuitry   eliminates   noises during turn-on and turn-off transitions

◆2.2 – 5.0V operation

◆No  output  coupling  capacitors,  snubber  networks  or bootstrap capacitors required

◆Thermal shutdown protection

◆Unity-gain stable

◆External gain configuration capability

Applications

◆Mobile Phones

◆PDAs

◆Portable electronic devices