ELN4890|Low-Cost, Mono/Stereo, 1 W Differential Audio Power Amplifiers

ELN4890|Low-Cost, Mono/Stereo, 1 W Differential Audio Power Amplifiers


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.




Key Specification


  • PSRR​​ ​​ @fIN​​ =​​ 217Hz, VDD =​​ 5V  ​​​​ 62dB(typ.)

  • Power Output​​ @​​ VDD= 5.0V &1% THD ​​ ​​​​ ​​ 1W(typ.)

  • Power Output @​​ VDD=3.3V &1% THD 400mW(typ.)​​ 

  • Shutdown Current​​  ​​ ​​ ​​​​ 0.1μA(typ.)







  • 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










  • Mobile Phones​​ 

  • PDAs​​ ​​ 

  • Portable electronic​​ devices




  • MSOP-8​​ ​​ 

  • SOP-8




Typical Application Circuit


















Ordering Information














Operating Ratings


Temperature Range

TMIN ≤ TA ≤ TMAX------------------------------------------------------------​​  ​​​​ −40°C ≤ TA ≤ 85°C

Supply Voltage--------------------------------------------------------------------  ​​​​ 2.2V ≤ VDD ≤ 5.0V








Pin Configuration
















Pin Function Description
















Marking Rule


  • MSOP-8、SOP-8













Absolute Maximum Ratings











Function Block Diagram


















Electrical Characteristics


(VDD​​ = 5V Unless otherwise specified. Limits apply for TA​​ = 25°C.)











































(VDD = 3V Unless otherwise specified. Limits apply for TA = 25°C.)