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參數(shù)資料
| 型號： | LM4804LQ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Low Voltage High Power Audio Power Amplifier |
| 中文描述： | 1.9 W, 1 CHANNEL, AUDIO AMPLIFIER, QCC28 |
| 封裝： | LLP-28 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 820K |
| 代理商： | LM4804LQ |
LM4804
Low Voltage High Power Audio Power Amplifier
General Description
The LM4804 integrates a Boost Converter with an Audio
Power Amplifier to drive voice coil speakers in portable
applications. When powered by a 3V supply, it is capable of
creating 1.8W power dissipation in an 8
bridge-tied-load
(BTL) with less than 1% THD+N.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4804 does not require boot-
strap capacitors, or snubber circuits. Therefore it is ideally
suited for portable applications requiring high output voltage
and minimal size.
The LM4804 features a micro-power shutdown mode. Addi-
tionally, the LM4804 features an internal thermal shutdown
protection mechanism.
The LM4804 contains advanced pop & click circuitry that
eliminates output transients which would otherwise occur
during power or shutdown cycles.
The LM4804 is unity-gain stable. Its closed-loop gain is
determined by the value of external, user selected resistors.
Key Specifications
j
Quiescent Power Supply Current
(V
DD
= 4.2V, R
L
= 8
)
j
BTL Output Power
(R
L
= 8
, 2% THD+N, V
DD
= 3V)
j
Shutdown Current
11mA (typ)
1.8W (typ)
2μA (max)
Features
n
Pop & click circuitry eliminates noise during turn-on and
turn-off transitions
n
Low, 2μA (max) shutdown current
n
Low, 11mA (typ) quiescent current (V
DD
= 4.2V, R
L
=
8
)
n
1.8W mono BTL output, R
L
= 8
, V
DD
= 3V
n
Short circuit protection
n
Unity-gain stable
n
External gain configuration capability
Applications
n
Cellphone
n
PDA
Connection Diagrams
LM4804LQ (5x5)
LQ Marking
20116784
Top View
Order Number LM4804LQ
See NS Package Number LQA28A
20116737
Top View
U = Wafer Fab Code
Z = Assembly Plant Code
XY = Date Code
TT = Die Run Code
Boomer
is a registered trademark of National Semiconductor Corporation.
March 2005
L
2005 National Semiconductor Corporation
DS201167
www.national.com
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| LM4849 | Stereo 2W Audio Power Amplifiers with DC Volume Control and Input Mux |
| LM4849MH | Stereo 2W Audio Power Amplifiers with DC Volume Control and Input Mux |
| LM4852 | Integrated Audio Amplifier System |
| LM4852LQ | Integrated Audio Amplifier System |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4804LQ/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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4804LQX | 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4804LQX/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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4805 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3V, 1W Boosted Boomer |
| LM4805_0508 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Voltage High Power Audio Power Amplifier |
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