LM4674ATLX

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

illustrate

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, reduces the number of external components, board area consumption, system cost, and simplifies design.

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 providing a continuous output power of 2.5W/channel for 4 The load is less than 10% THD+N Flexible power requirements allow operation from 2.4V to 5.5V.

LM4674A features that are more efficient than traditional Class AB amplifiers. When driving 8 From a speaker with a 3.6V power supply, the device has a functional efficiency of 85%, P O = 500MW. The four gain selection pins are selected via the GAIN0 and Gain 1 pins.

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

Key specifications:

At 3.6V, 100MW efficiency is 8	80% (typical)
At 3.6V, the efficiency of 500mW is 8	85% (typical)
5V, 8 x 1W efficiency	85% (typical)
The quiescent supply current is in the 3.6V supply	4 mAh
The output power is between V DD = 5V and R L = 4 总谐波失真	2.5W (typical)
The output power is VDD = 5V and RL = 8 总谐波失真	1.5W (typical)
Turn off the current	0.1μA (typical)

apply

• mobile phone
• handheld computer
• laptop