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參數資料
| 型號： | LM4953 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Ground-Referenced, Ultra Low Noise, Ceramic Speaker Driver |
| 中文描述： | 地為參考，超低噪音，陶瓷揚聲器驅動器 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 663K |
| 代理商： | LM4953 |
LM4953
Ground-Referenced, Ultra Low Noise, Ceramic Speaker
Driver
General Description
The LM4953 is an audio power amplifier designed for driving
Ceramic Speaker in portable applications. When powered by
a 3.6V supply, it is capable of forcing 12.6Vpp across a 2μF
+ 30
bridge-tied-load (BTL) with less than 1% THD+N.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4953 does not require boot-
strap capacitors, or snubber circuits. Therefore it is ideally
suited for display applications requiring high power and mini-
mal size.
The LM4953 features a low-power consumption shutdown
mode. Additionally, the LM4953 features an internal thermal
shutdown protection mechanism.
The LM4953 contains advanced pop & click circuitry that
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
The LM4953 is unity-gain stable and can be configured by
external gain-setting resistors.
Key Specifications
j
Quiescent Power Supply Current (V
dd
= 3V) 7mA(typ)
j
BTL Voltage Swing
(2μF+30
load, 1% THD+N,
V
dd
= 3.6V)
j
Shutdown Current
12.6V
pp
(typ)
1μA (max)
Features
n
Pop & click circuitry eliminates noise during turn-on and
turn-off transitions
n
Low, 1μA (max) shutdown current
n
Low, 7mA (typ) quiescent current
n
12.6Vpp mono BTL output, load = 2μF+ 30
n
Thermal shutdown
n
Unity-gain stable
n
External gain configuration capability
Applications
n
Cellphone
n
PDA
Typical Application
Boomer
is a registered trademark of National Semiconductor Corporation.
20142168
FIGURE 1. Typical Application Circuit
September 2005
L
2005 National Semiconductor Corporation
DS201421
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4953SD | 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 |
| LM4953SD/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 |
| LM4953SDBD | 功能描述:BOARD EVALUATION LM4953SD RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 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:- |
| LM4953SDBD/NOPB | 功能描述:音頻 IC 開發(fā)工具 LM4953SD EVAL BRD RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| LM4953SDX | 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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