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參數(shù)資料
| 型號： | LM4913MM |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 音頻放大器 |
| 英文描述： | 2W Monaural, 90mW Stereo Headphone Audio Amplifier |
| 中文描述： | 2W的單聲道，立體聲耳機90兆瓦音頻放大器 |
| 文件頁數(shù)： | 6/15頁 |
| 文件大?。?/td> | 767K |
| 代理商： | LM4913MM |
External Components Description
(
Figure 1
)
Components
1.
Functional Description
R
i
This is the input resistor for the inverting input that, along with the 62.5k
internal feedback resistor R
f
, sets
the first stage’s closed-loop gain. The overall SE gain is A
V
(SE) = 62.5k
/ R
i
, whereas the overall BTL gain
is A
V
(BTL) = -125k
/ R
i
. Input resistance R
i
and input capacitance C
i
form a high pass filter. The ffilter’s
cutoff frequency is filter’s cutoff frequency is f
C
= 1 / 2
π
R
i
C
i
.
This is the input coupling capacitor. It blocks DC voltage at the amplifier’s inverting input. C
i
i and R
i
create a
highpass filter. The filter’s cutoff frequency is f
C
= 1 / 2
π
R
i
C
i
. Refer to the Application Information section,
SELECTING EXTERNAL COMPONENTS, for an explanation of determining C
i
’s value.
This is the output coupling capacitor. Refer to the Application Information section, SELECTING EXTERNAL
COMPONENTS, for an explanation of determining CC’s value.
The supply bypass capacitor. Refer to the POWER SUPPLY BYPASSING section for information about
properly placing, and selecting the value of this capacitor.
This capacitor filters the half-supply voltage present on the BYPASS pin. Refer to the Application Information
section, SELECTING EXTERNAL COMPONENTS, for information about properly placing, and selecting the
value of this capacitor.
2.
C
i
3.
C
C
4.
C
S
5.
C
B
Typical Performance Characteristics
Total Harmonic Distortion vs
Output Power
Total Harmonic Distortion vs
Output Power
200617A3
200617B8
Total Harmonic Distortion + Noise
vs Frequency
Total Harmonic Distortion + Noise
vs Frequency
200617A4
200617A5
L
www.national.com
6
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PDF描述 |
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| LM4917 | Ground-Referenced, 95mW Stereo Headphone Amplifier |
| LM4917MT | Ground-Referenced, 95mW Stereo Headphone Amplifier |
| LM4917SD | Ground-Referenced, 95mW Stereo Headphone Amplifier |
| LM4918 | Stereo Audio Amp with AGC Control |
| LM4918LQ | Stereo Audio Amp with AGC Control |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4914 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1W Monaural, 85mW Stereo Headphone Audio Amplifier |
| LM4914A WAF | 制造商:Texas Instruments 功能描述: |
| LM4914MH | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1W Monaural, 85mW Stereo Headphone Audio Amplifier |
| LM4914MH/NOPB | 制造商:Texas Instruments 功能描述:Audio Amp Headphone/Speaker 1-CH Mono/2-CH Stereo 1W Class-AB 10-Pin TSSOP EP T/R |
| LM4915 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Pseudo-Differential Mono Headphone Amplifier with Fixed 6dB Gain |
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