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參數資料
| 型號： | LM4917 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Ground-Referenced, 95mW Stereo Headphone Amplifier |
| 中文描述： | 地為參考，95mW立體聲耳機放大器 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 1208K |
| 代理商： | LM4917 |
LM4917
Ground-Referenced, 95mW Stereo Headphone Amplifier
General Description
The LM4917 is a stereo, output capacitor-less headphone
amplifier capable of delivering 95mW of continuous average
power into a 16
load with less than 1% THD+N from a
single 3V power supply.
The LM4917 provides high quality audio reproduction with
minimal external components. A ground referenced output
eliminates the output coupling capacitors typically required
by single-ended loads, reducing component count, cost and
board space consumption. This makes the LM4917 ideal for
mobile phones and other portable equipment where board
space is at a premium. Eliminating the output coupling ca-
pacitors also improves low frequency response.
The LM4917 operates from a single 1.4V to 3.6V power
supply, features low 0.02% THD+N and 70dB PSRR. Inde-
pendent right/left channel low-power shutdown controls pro-
vide power saving flexibility for mono/stereo applications.
Superior click and pop suppression eliminates audible tran-
sients during start up and shutdown. Short circuit and ther-
mal overload protection protects the device during fault con-
ditions.
Key Specifications
j
Improved PSRR at 1kHz
j
Power Output at V
DD
= 3V,
R
L
= 16
, THD
%
1%
j
Shutdown Current
70dB (typ)
95mW (typ)
0.01μA (typ)
Features
n
Ground referenced outputs
n
High PSRR
n
Available in space-saving TSSOP package
n
Ultra low current shutdown mode
n
Improved pop & click circuitry eliminates noises during
turn-on and turn-off transitions
n
1.4 – 3.6V operation
n
No output coupling capacitors, snubber networks,
bootstrap capacitors
n
Shutdown either channel independently
Applications
n
Notebook PCs
n
Desktop PCs
n
Mobile Phone
n
PDAs
n
Portable electronic devices
Block Diagram
Boomer
is a registered trademark of National Semiconductor Corporation.
200893B8
FIGURE 1. Circuit Block Diagram
November 2004
L
2004 National Semiconductor Corporation
DS200893
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4917MT | Ground-Referenced, 95mW Stereo Headphone Amplifier |
| LM4917SD | Ground-Referenced, 95mW Stereo Headphone Amplifier |
| LM4918 | Stereo Audio Amp with AGC Control |
| LM4918LQ | Stereo Audio Amp with AGC Control |
| LM4924 | 2 Cell Battery, 40mW Per Channel Output Capacitor-Less(OCL) Stereo Headphone Audio Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4917MT | 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 |
| LM4917MT/NOPB | 功能描述:音頻放大器 95mW St Headphone Amp 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 |
| LM4917MTBD | 功能描述:BOARD EVALUATION LM4917MT 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:- |
| LM4917MTX | 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 |
| LM4917MTX/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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