參數(shù)資料
型號(hào)： LM4752MDC
廠(chǎng)商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 音頻／視頻放大
英文描述： 7 W, 2 CHANNEL, AUDIO AMPLIFIER, UUC
封裝： DIE
文件頁(yè)數(shù)： 3/21頁(yè)
文件大?。?/td> 732K
代理商： LM4752MDC
Application Information (Continued)
PREVENTING OSCILLATIONS
With the integration of the feedback and bias resistors on-
chip, the LM4752 fits into a very compact package. However,
due to the close proximity of the non-inverting input pins to
the corresponding output pins, the inputs should be AC ter-
minated at all times. If the inputs are left floating, the ampli-
fier will have a positive feedback path through high imped-
ance coupling, resulting in a high frequency oscillation. In
most applications, this termination is typically provided by
the previous stage’s source impedance. If the application will
require an external signal, the inputs should be terminated to
ground with a resistance of 50 k
or less on the AC side of
the input coupling capacitors.
UNDERVOLTAGE SHUTDOWN
If the power supply voltage drops below the minimum oper-
ating supply voltage, the internal under-voltage detection cir-
cuitry pulls down the half-supply bias line, shutting down the
preamp section of the LM4752. Due to the wide operating
supply range of the LM4752, the threshold is set to just un-
der 9V. There may be certain applications where a higher
threshold voltage is desired. One example is a design requir-
ing a high operating supply voltage, with large supply and
bias capacitors, and there is little or no other circuitry con-
nected to the main power supply rail. In this circuit, when the
power is disconnected, the supply and bias capacitors will
discharge at a slower rate, possibly resulting in audible out-
put distortion as the decaying voltage begins to clip the out-
DS100039-30
FIGURE 5. Bridge-Mode Application
DS100039-31
DS100039-37
FIGURE 6. THD+N vs. P
OUT for Bridge-Mode Application
LM4752
www.national.com
11
相關(guān)PDF資料
PDF描述
LM4752MWC 7 W, 2 CHANNEL, AUDIO AMPLIFIER, UUC
LM4752T/NOPB 7 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM7
LM4753T 11.8 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM15
LM4755MWC 11 W, 2 CHANNEL, AUDIO AMPLIFIER, UUC
LM4755MDC 11 W, 2 CHANNEL, AUDIO AMPLIFIER, UUC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4752T 制造商:National Semiconductor Corporation 功能描述: 制造商:Texas Instruments 功能描述:
LM4752T/NOPB 功能描述:IC AMP AUDIO PWR 11W AB TO220-7 RoHS:是 類(lèi)別:集成電路 (IC) >> 線(xiàn)性 - 音頻放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類(lèi)型:H 類(lèi) 輸出類(lèi)型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類(lèi)型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
LM4752T/NOPB 制造商:Texas Instruments 功能描述:Audio Power Amplifier IC
LM4752TS 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(lèi)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
LM4752TS/NOPB 功能描述:音頻放大器 STEREO 11W AUDIO PWR AMP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
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