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參數資料
| 型號： | LM4805 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 3V, 1W Boosted Boomer |
| 中文描述： | 3V的，1W的，細看布瑪 |
| 文件頁數： | 1/18頁 |
| 文件大?。?/td> | 1063K |
| 代理商： | LM4805 |
LM4805
3V, 1W Boosted Boomer
General Description
The LM4805 is a boosted audio power amplifier designed for
driving 8ohm speakers in portable applications. It delivers at
least 1W continuous power to an 8
load from any input
voltage between 3V and 4.6V with less than 2% THD+N.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4805 does not require boot-
strap capacitors, or snubber circuits. Therefore it is ideally
suited for portable applications requiring high power and
minimal size.
The LM4805 features a low-power consumption shutdown
mode along with an internal thermal shutdown protection
mechanism and short circuit protection.
The LM4805 contains advanced pop & click circuitry that
eliminates noises which would otherwise occur during
turn-on and turn-off transitions. The LM4805 is unity-gain
stable and can be configured by external gain-setting resis-
tors.
Key Specifications
j
Quiescent Power Supply Current
(V
DD
= 3V)
j
Output Power
(V
DD
= 3.0V, R
L
= 8
, THD+N = 2%)
j
Shutdown Current
14mA (typ)
1W (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, 14mA (typ) quiescent current
n
Unity-gain stable
n
External gain configuration capability
Applications
n
Cellphone
n
PTT (Push To Talk) mobile phones
Connection Diagrams
LM4805LQ (5x5)
LQ Marking
20126284
Top View
Order Number LM4805LQ
See NS Package Number LQA28A
20126256
Top View
U = Wafer Fab
Z = Assembly Plant Code
XY = Date Code
TT = Die Run Code
Boomer
is a registered trademark of National Semiconductor Corporation.
May 2005
L
2005 National Semiconductor Corporation
DS201262
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4805LQ | 3V, 1W Boosted Boomer |
| LM4808 | Dual 105 mW Headphone Amplifier |
| LM4808M | Dual 105 mW Headphone Amplifier |
| LM4808MM | Dual 105 mW Headphone Amplifier |
| LM4831VF | Multimedia Computer Audio Chip |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4805_0508 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Voltage High Power Audio Power Amplifier |
| LM4805LQ | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品: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 |
| LM4805LQ/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品: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 |
| LM4805LQX | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品: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 |
| LM4805LQX/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品: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 |
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