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
• 可节省空间采用2mm x采用2mm x0.6毫米微型SMD封装

illustrate

LM4674A是单电源，效率高，2.5W/channel，滤波开关音频放大器。 A low-noise PWM architecture eliminates the need for output filters, reducing external component count, board area consumption, system cost, and simplifying design.

LM4674A是专为满足手机和其它便携式通信设备的需求。 设备是从一个单一5V电源工作，能够提供连续输出功率2.5W/channel为4 负载小于10％THD + N Flexible power requirements allow operation from 2.4V to 5.5V.

LM4674A功能，相比传统的AB类放大器的高效率。 当驾驶8 从一个3.6V电源的扬声器，设备功能效率为_85％，PO = 500MW。 四个增益选择引脚通过GAIN0和增益1引脚选择。

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. 左/右独立的关断控制在混合单声道/立体声应用最大化节省功耗。

Main specifications

在3.6V，100MW效率为8	80% (typical)
在3.6V，500mW的效率为8	85% (typical)
5V，效率为8个1W	85% (typical)
静态电源电流在3.6V电源	4 mAh
The output power is in VDD=5V，RL = 4 总谐波失真	2.5W (typical)
输出功率在VDD=5V，RL​​= 8 总谐波失真	1.5W (typical)
Shutdown current	0.1μA (typical)

apply

• mobile phone
• Pocket PC
• laptop