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參數(shù)資料
| 型號(hào)： | LM4664 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 音頻放大器 |
| 英文描述： | Filterless High Efficiency 1.1W Switching Audio Amplifier |
| 中文描述： | 濾波高效率開(kāi)關(guān)音頻放大器1.1W |
| 文件頁(yè)數(shù)： | 10/14頁(yè) |
| 文件大?。?/td> | 550K |
| 代理商： | LM4664 |
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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 8.3μA of current
will be drawn while in the shutdown state.
GAIN SELECTION FUNCTION
The LM4664 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
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 LM4664 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.
L
www.national.com
10
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4665 | Filterless High Efficiency 1W Switching Audio Amplifier |
| LM4665ITLX | Filterless High Efficiency 1W Switching Audio Amplifier |
| LM4665LD | Filterless High Efficiency 1W Switching Audio Amplifier |
| LM4665MM | Filterless High Efficiency 1W Switching Audio Amplifier |
| LM4665ITL | Filterless High Efficiency 1W Switching Audio Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4664ITL | 制造商:Texas Instruments 功能描述:AMP FILTERLESS CLASS-A 1.1W 4664 |
| LM4665 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Filterless High Efficiency 1W Switching Audio Amplifier |
| LM4665 WAF | 制造商:Texas Instruments 功能描述: |
| LM4665B WAF | 制造商:Texas Instruments 功能描述: |
| LM4665ITL | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 1.4W Class-AB 9-Pin uSMD T/R 制造商:Texas Instruments 功能描述:1W Class D Switching Amplifier,LM4665ITL |
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