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參數資料
| 型號： | LM4901LD/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.6 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| 封裝： | LLP-10 |
| 文件頁數： | 1/21頁 |
| 文件大小： | 1281K |
| 代理商： | LM4901LD/NOPB |
LM4901
1.6 Watt Audio Power Amplifier with Selectable
Shutdown Logic Level
General Description
The LM4901 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 watt of continuous average power to an 8
BTL
load and 1.6 watts of continuous avearge power to a 4
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 LM4901 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 LM4901 features a low-power consumption shutdown
mode. To facilitate this, Shutdown may be enabled by either
logic high or low depending on mode selection. Driving the
shutdown mode pin either high or low enables the shutdown
pin to be driven in a likewise manner to enable shutdown.
The LM4901 contains advanced pop & click circuitry which
eliminates noise which would otherwise occur during turn-on
and turn-off transitions.
The LM4901 is unity-gain stable and can be configured by
external gain-setting resistors.
Key Specifications
j Improved PSRR at 217Hz & 1KHz
62dB
j Power Output at 5.0V, 1% THD, 4
1.6W (typ)
j Power Output at 5.0V, 1% THD, 8
1.07W (typ)
j Power Output at 3.0V, 1% THD, 4
525mW (typ)
j Power Output at 3.0V, 1% THD, 8
390mW (typ)
j Shutdown Current
0.1A (typ)
Features
n
Available in space-saving packages: LLP and MSOP
n
Ultra low current shutdown mode
n
BTL output can drive capacitive loads
n
Improved pop & click circuitry eliminates noise during
turn-on and turn-off transitions
n
2.0 - 5.5V operation
n
No output coupling capacitors, snubber networks or
bootstrap capacitors required
n
Unity-gain stable
n
External gain configuration capability
n
User selectable shutdown High or Low logic Level
Applications
n
Mobile Phones
n
PDAs
n
Portable electronic devices
Typical Application
Boomer is a registered trademark of National Semiconductor Corporation.
20019801
FIGURE 1. Typical Audio Amplifier Application Circuit
July 2006
LM4901
1.6
W
att
Audio
Power
Amplifier
with
Selectable
Shutdown
Logic
Level
2006 National Semiconductor Corporation
DS200198
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4901LDX/NOPB | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 1.6W Class-AB 10-Pin LLP EP T/R |
| LM4901MM | 制造商:Texas Instruments 功能描述:AMP AUDIO POWER 1W SMD LLP-16 |
| LM4901MM/NOPB | 功能描述:IC AMP AUDIO PWR 1.6W AB 10MSOP RoHS:是 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) |
| LM4901MMBD | 功能描述:BOARD EVALUATION LM4901MM RoHS:否 類別:編程器，開發系統 >> 評估板 - 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:1 系列:- |
| LM4901MMX | 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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