參數資料
型號: LM4891MM/NOPB
廠商: National Semiconductor
文件頁數: 7/21頁
文件大?。?/td> 0K
描述: IC AMP AUDIO PWR 1W MONO 8MSOP
標準包裝: 1
系列: Boomer®
類型: AB 類
輸出類型: 1-通道(單聲道)
在某負載時最大輸出功率 x 通道數量: 1W x 1 @ 8 歐姆
電源電壓: 2.2 V ~ 5.5 V
特點: 消除爆音,關機,熱保護
安裝類型: 表面貼裝
供應商設備封裝: 8-MSOP
封裝/外殼: 8-TSSOP,8-MSOP(0.118",3.00mm 寬)
包裝: 剪切帶 (CT)
其它名稱: *LM4891MM
*LM4891MM/NOPB
LM4891MMCT
OBSOLETE
SNAS122E – MAY 2001 – REVISED APRIL 2013
Figure 31. Higher Gain Audio Amplifier
The LM4891 is unity-gain stable and requires no external components besides gain-setting resistors, an input
coupling capacitor, and proper supply bypassing in the typical application. However, if a closed-loop differential
gain of greater than 10 is required, a feedback capacitor (C4) may be needed as shown in Figure 31 to
bandwidth limit the amplifier. This feedback capacitor creates a low pass filter that eliminates possible high
frequency oscillations. Care should be taken when calculating the -3dB frequency in that an incorrect
combination of R3 and C4 will cause rolloff before 20kHz. A typical combination of feedback resistor and
capacitor that will not produce audio band high frequency rolloff is R3 = 20k and C4 = 25pf. These components
result in a -3dB point of approximately 320 kHz.
Figure 32. Differential Amplifier Configuration for LM4891
Copyright 2001–2013, Texas Instruments Incorporated
15
Product Folder Links: LM4891
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LM4891MX/NOPB 功能描述:IC AMP AUDIO PWR 1W MONO 8SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機,2-通道(立體聲) 在某負載時最大輸出功率 x 通道數量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C,麥克風,靜音,短路保護,音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP(2.09x2.09) 封裝/外殼:25-WFBGA,WLCSP 包裝:帶卷 (TR)
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