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參數資料
| 型號： | LM4879IBP/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| 封裝： | MO-211BC, MICRO, SMD-8 |
| 文件頁數： | 1/25頁 |
| 文件大?。?/td> | 793K |
| 代理商： | LM4879IBP/NOPB |
LM4879
1.1 Watt Audio Power Amplifier
General Description
The LM4879 is an audio power amplifier primarily designed
for demanding applications in mobile phones and other por-
table communication device applications. It is capable of
delivering 1.1 watt of continuous average power to an 8
BTL load with less than 1% 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 LM4879 does not require output
coupling capacitors or bootstrap capacitors, and therefore is
ideally suited for lower-power portable applications where
minimal space and power consumption are primary require-
ments.
The LM4879 features a low-power consumption global shut-
down mode, which is achieved by driving the shutdown pin
with logic low. Additionally, the LM4879 features an internal
thermal shutdown protection mechanism.
The LM4879 contains advanced pop & click circuitry which
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
The LM4879 is unity-gain stable and can be configured by
external gain-setting resistors.
Key Specifications
j PSRR: 5V, 3V @ 217Hz
62dB (typ)
j Power Output at 5V & 1% THD+N
1.1W (typ)
j Power Output at 3V & 1% THD+N
350mW (typ)
j Shutdown Current
0.1A (typ)
Features
n
No output coupling capacitors, snubber networks or
bootstrap capacitors required
n
Unity gain stable
n
Ultra low current shutdown mode
n
Fast turn on: 80ms (typ), 110ms (max) with 1.0F
capacitor
n
BTL output can drive capacitive loads up to 100pF
n
Advanced pop & click circuitry eliminates noises during
turn-on and turn-off transitions
n
2.2V - 5.0V operation
n
Available in space-saving SMD, LLP, and MSOP
packages
Applications
n
Mobile Phones
n
PDAs
n
Portable electronic devices
Typical Application
Boomer is a registered trademark of National Semiconductor Corporation.
20024301
FIGURE 1. Typical Audio Amplifier Application Circuit
October 2004
LM4879
1.1
W
att
Audio
Power
Amplifier
2004 National Semiconductor Corporation
DS200243
www.national.com
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| LM4880-SH2-R | 0.35 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| LM4880-SH2-T | 0.35 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4879IBPX | 功能描述:IC AMP AUDIO PWR 1.1W MONO 8USMD RoHS:否 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4879ITL | 制造商:Texas Instruments 功能描述:AMP AUDIO BOOMER 1.1W SMD BUMP-9 |
| LM4879ITL/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 |
| LM4879ITLX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.1 Watt Audio Power Amplifier |
| LM4879ITLX/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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