LM4674A
- 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 Package
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% 2.5W (typ)
- Power Output at VDD = 5V, RL = 8Ω, THD ≤ 10% 1.5W (typ)
- Shutdown Current 0.1μA (typ)
All trademarks are the property of their respective owners.
The LM4674A 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 LM4674A 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 LM4674A 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 GAIN0 and GAIN1 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 controls maximizes power savings in mixed mono/stereo applications.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | LM4674A Filterless 2.5W Stereo Class D Audio Power Amplifier 数据表 (Rev. A) | 2013年 5月 1日 | |||
应用手册 | Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) | 2019年 8月 26日 | ||||
应用手册 | AN-1849 An Audio Amplifier Power Supply Design (Rev. C) | 2019年 6月 27日 | ||||
应用手册 | AN-1737 Managing EMI in Class D Audio Applications (Rev. A) | 2013年 5月 1日 |
设计和开发
如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。
PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®
借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。
在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
DSBGA (YZR) | 16 | Ultra Librarian |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点