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參數(shù)資料
| 型號(hào)： | LM3876DWF |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 56 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| 封裝： | WAFER |
| 文件頁數(shù)： | 19/22頁 |
| 文件大?。?/td> | 626K |
| 代理商： | LM3876DWF |
Equivalent Schematic (excluding active protection circuitry)
External Components Description
(
Figures 1, 2)
Components
Functional Description
1.
R
IN
Acts as a volume control by setting the voltage level allowed to the amplifier’s input terminals.
2.
R
A
Provides DC voltage biasing for the single supply operation and bias current for the positive input terminal.
3.
C
A
Provides bias filtering.
4.
C
Provides AC coupling at the input and output of the amplifier for single supply operation.
5.
R
B
Prevents currents from entering the amplifier’s non-inverting input which may be passed through to the load
upon power-down of the system due to the low input impedance of the circuitry when the under-voltage
circuitry is off. This phenomenon occurs when the supply voltages are below 1.5V.
6.
C
(Note 15)
Reduces the gain (bandwidth of the amplifier) at high frequencies to avoid quasi-saturation oscillations of
the output transistor. The capacitor also suppresses external electromagnetic switching noise created from
fluorescent lamps.
7.
Ri
Inverting input resistance to provide AC Gain in conjunction with R
f1.
8.
Ci
(Note 15)
Feedback capacitor. Ensures unity gain at DC. Also a low frequency pole (highpass roll-off) at:
f
c = 1/(2πRi Ci)
9.
R
f1
Feedback resistance to provide AC Gain in conjunction with Ri.
DS011832-6
www.national.com
6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3876T | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM3876T | 制造商:National Semiconductor Corporation 功能描述:56W W/Mute, 1 Channel Lm3876T IC Audio Amp |
| LM3876T/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM3876TF | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM3876TF NOPB | 制造商:Texas Instruments 功能描述:8MHz Class-AB Bulk |
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