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參數(shù)資料
| 型號： | LM4855ITL |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
| 中文描述： | 1.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PBGA18 |
| 封裝： | MICRO SMD-18 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 1116K |
| 代理商： | LM4855ITL |
LM4855
Integrated Audio Amplifier System
General Description
The LM4855 is an audio power amplifier system capable of
delivering 1.1W (typ) of continuous average power into a
mono 8
bridged-tied load (BTL) with 1% THD+N and
115mW (typ) per channel of continuous average power into
stereo 32
BTL loads with 0.5% THD+N, using a 5V power
supply.
The LM4855 features a 32 step digital volume control and
eight distinct output modes. The digital volume control and
output modes are programmed through a three-wire SPI
serial control interface, that allows flexibility in routing and
mixing audio channels.
The LM4855 is designed for cellular phone, PDA, and other
portable handheld applications. It delivers high quality output
power from a surface-mount package and requires only six
external components.
The industry leading micro SMD package only utilizes 2mm
x 2.3mm of PCB space, making the LM4855 the most space
efficient audio sub system available today.
Key Specifications
n
THD+N at 1kHz, 1.1W into 8
BTL
n
THD+N at 1kHz, 115mW into 32
BTL
n
Single Supply Operation
1.0% (typ)
0.5% (typ)
2.6 to 5.0V
Features
n
1.1W (typ) output power with 8
mono BTL load
n
115mW (typ) output power with stereo 32
BTL loads
n
SPI programmable 32 step digital volume control
n
Eight distinct output modes
n
micro-SMD and LLP surface mount packaging
n
"Click and Pop" suppression circuitry
n
Thermal shutdown protection
n
Low shutdown current (0.1uA, typ)
Applications
n
Moblie Phones
n
PDAs
Typical Application
Boomer
is a registered trademark of National Semiconductor Corporation.
200395D1
FIGURE 1. Typical Audio Amplifier Application Circuit
November 2002
L
2002 National Semiconductor Corporation
DS200395
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4855 | Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
| LM4857 | Stereo 1.2W Audio Sub-system with 3D Enhancement |
| LM4857GR | Stereo 1.2W Audio Sub-system with 3D Enhancement |
| LM4857ITL | Stereo 1.2W Audio Sub-system with 3D Enhancement |
| LM4857SP | Stereo 1.2W Audio Sub-system with 3D Enhancement |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM4855ITL/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 |
| LM4855ITLX | 制造商:Texas Instruments 功能描述:Audio Amp Headphone/Speaker 1-CH Mono/2-CH Stereo 1.1W Class-AB 18-Pin uSMD T/R |
| LM4855ITLX/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 |
| LM4855LQ | 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 |
| LM4855LQ/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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