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参数资料
| 型号： | LM4667 |
| 厂商： | National Semiconductor Corporation |
| 元件分类： | 音频放大器 |
| 英文描述： | Filterless High Efficiency 1.3W Switching Audio Amplifier |
| 中文描述： | 滤波高效率的1.3W开关音频放大器 |
| 文件页数： | 2/16页 |
| 文件大小： | 757K |
| 代理商： | LM4667 |
Application Information (Continued)
the shutdown voltage has crossed the threshold. To mini-
mize the supply current while in the shutdown state, the
Shutdown pin should be driven to GND or left floating. If the
Shutdown pin is not driven to GND, the amount of additional
resistor current due to the internal shutdown resistor can be
found by Equation (1) below.
(V
SD - GND) / 60k
(1)
With only a 0.5V difference, an additional 8.3A of current
will be drawn while in the shutdown state.
GAIN SELECTION FUNCTION
The LM4667 has fixed selectable gain to minimize external
components, increase flexibility and simplify design. For a
differential gain of 6dB, the Gain Select pin should be per-
manently connected to V
DD or driven to a logic high level.
For a differential gain of 12dB, the Gain Select pin should be
permanently connected to GND or driven to a logic low level.
The gain of the LM4667 can be switched while the amplifier
is in PLAY mode driving a load with a signal without damage
to the IC. The voltage on the Gain Select pin should be
switched quickly between GND (logic low) and V
DD (logic
high) to eliminate any possible audible artifacts from appear-
ing at the output. For typical threshold voltages for the Gain
Select function, refer to the Gain Threshold Voltages graph
in the Typical Performance Characteristics section.
LM4667
www.national.com
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4667ITL | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 1.3W Class-AB 9-Pin uSMD T/R 制造商:Texas Instruments 功能描述:1.3W Switching Audio Amplifier,LM4667ITL |
| LM4667ITL/NOPB | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4667ITLX | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 1.3W Class-AB 9-Pin uSMD T/R |
| LM4667ITLX/NOPB | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4667MM | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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