LM4674ATLX

• Output short-circuit protection
• Stereo Class D operation
• No output filter is required
• Logic selects gain
• Independent shutdown control
• Minimal external components
• Click inhibition
• Micropower shutdown
• Space-saving in a 2mm x 2mm x 2mm x 0.6mm miniature SMD package

illustrate

The LM4674A is a single-supply, high efficiency, 2.5W/channel, filter-switched audio amplifier. A low-noise PWM architecture eliminates the need for output filters, reducing external component count, board area consumption, system cost, and simplifying design.

The LM4674A is designed to meet the needs of mobile phones and other portable communication devices. The device operates from a single 5V supply and is capable of delivering 2.5W/channel 4 of continuous output power Load less than 10% THD + N Flexible power requirements allow operation from 2.4V to 5.5V.

The LM4674A features high efficiency compared to conventional Class AB amplifiers. When driving 8 From a speaker powered by a 3.6V supply, the device functions efficiently as_85％，PO = 500MW。 The four gain select pins are selected via the GAIN0 and gain 1 pins.

Output short-circuit protection against damage to the device under fault conditions. Advanced click suppression eliminates power-up/down and audible transient noise when off. Independent left/right shutdown control maximizes power savings in hybrid mono/stereo applications.

Main specifications

At 3.6V, 100MW efficiency is 8	80% (typical)
At 3.6V, the efficiency of 500mW is 8	85% (typical)
5V, efficiency is 8 x 1W	85% (typical)
Quiescent supply current is at 3.6V supply	4 mAh
The output power is in VDD=5V，RL = 4 Total harmonic distortion	2.5W (typical)
The output power is inVDD=5V，RL​​= 8 Total harmonic distortion	1.5W (typical)
Shutdown current	0.1μA (typical)

apply

• mobile phone
• Pocket PC
• laptop