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參數(shù)資料
| 型號(hào)： | LM4889LD/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 音頻／視頻放大 |
| 英文描述： | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| 封裝： | LLP-10 |
| 文件頁(yè)數(shù)： | 1/9頁(yè) |
| 文件大小： | 656K |
| 代理商： | LM4889LD/NOPB |
November 2006
LM4889
1 Watt Audio Power Amplifier
General Description
The LM4889 is an audio power amplifier primarily designed
for demanding applications in mobile phones and other
portable communication device applications. It is capable of
delivering 1 watt of continuous average power to an 8
BTL
load with less than 2% distortion (THD+N) from a 5V
DC power
supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4889 does not require output
coupling capacitors or bootstrap capacitors, and therefore is
ideally suited for mobile phone and other low voltage appli-
cations where minimal power consumption is a primary re-
quirement.
The LM4889 features a low-power consumption shutdown
mode, which is achieved by driving the shutdown pin with a
logic low. Additionally, the LM4889 features an internal ther-
mal shutdown protection mechanism.
The LM4889 contains advanced pop & click circuitry to elim-
inate noise which would otherwise occur during turn-on and
turn-off transitions.
The LM4889 is unity-gain stable and can be configured by
external gain-setting resistors.
Key Specifications
■Improved PSRR at 217Hz, 5 - 3.3V
75dB
■Power Output at 5.0V & 2% THD
1.0W(typ.)
■Power Output at 3.3V & 1% THD
400mW(typ.)
■Shutdown Current at 3.3 & 2.6V
0.01A(typ.)
Features
■ Available in space-saving MSOP, SOIC, LLP, and micro
SMD packages
■ Ultra low current shutdown mode (3.3 to 2.6V - 0.01A)
■ Can drive capacitive loads up to 500 pF
■ Improved pop & click circuitry eliminates noises during
turn-on and turn-off transitions
■ 2.2 - 5.5V operation
■ No output coupling capacitors, snubber networks or
bootstrap capacitors required
■ Unity-gain stable
■ External gain configuration capability
Applications
■ Mobile Phones
■ PDAs
■ Portable electronic devices
Typical Application
20035801
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer is a registered trademark of National Semiconductor Corporation.
2006 National Semiconductor Corporation
200358
www.national.com
LM4889
1
Watt
Audio
Power
Amplifier
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| LM4890IBP/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4889MA | 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 |
| LM4889MA /NOPB | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 1W Class-AB 8-Pin SOIC N Rail |
| LM4889MA/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(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 |
| LM4889MAX | 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 |
| LM4889MAX/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(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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