●The LM4674 is a single supply, high efficiency, 2.5W/channel, filterless switching audio amplifier. A low noise PWM architecture eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design.
●The LM4674 is designed to meet the demands of mobile phones and other portable communication devices. Operating from a single 5V supply, the device is capable of delivering 2.5W/channel of continuous output power to a 4Ω load with less than 10% THD+N. Flexible power supply requirements allow operation from 2.4V to 5.5V.
●The LM4674 features high efficiency compared to conventional Class AB amplifiers. When driving an 8Ω speaker from a 3.6V supply, the device features 85% efficiency at PO = 500mW. Four gain options are pin selectable through the G0 and G1 pins.
●Output short circuit protection prevents the device from being damaged during fault conditions. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. Independent left/right shutdown control maximizes power savings in mixed mono/stereo applications.
● Output Short Circuit Protection
● Stereo Class D Operation
● No Output Filter Required
● Logic Selectable Gain
● Independent Shutdown Control
● Minimum External Components
● Click and Pop Suppression
● Micro-Power Shutdown
● Available in Space-Saving 2mm x 2mm x 0.6mm DSBGA, and 4mm x 4mm x 0.8mm WQFN Packages
●## Key Specifications
● Efficiency at 3.6V, 100mW into 8Ω: 80% (typ)
● Efficiency at 3.6V, 500mW into 8Ω: 85% (typ)
● Efficiency at 5V, 1W into 8Ω: 85% (typ)
● Quiescent Power Supply Current
● at 3.6V supply: 4mA
● Power Output at VDD = 5V,
● RL = 4Ω, THD ≤ 10%: 2.5 W (typ)
● Shutdown Current: 0.03μA (typ)
●All trademarks are the property of their respective owners.
Part 3D Model
