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參數(shù)資料
| 型號： | LM4802B |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Audio Power Amplifier with Boost Converter to Drive Ceramic Speakers |
| 中文描述： | 音頻功率放大器與升壓轉(zhuǎn)換器驅(qū)動陶瓷揚聲器 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 1224K |
| 代理商： | LM4802B |
LM4802B
Audio Power Amplifier with Boost Converter to Drive
Ceramic Speakers
General Description
The LM4802B integrates a Boost Converter with an Audio
Power Amplifier to drive Ceramic Speakers in portable ap-
plications. When powered by a 3V supply, it is capable of
forcing 12Vp-p 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 LM4802B does not require boot-
strap capacitors, or snubber circuits. Therefore it is ideally
suited for portable applications requiring high output voltage
and minimal size.
The LM4802B features a low-power consumption shutdown
mode. Additionally, the LM4802B features an internal ther-
mal shutdown protection mechanism.
The LM4802B contains advanced pop & click circuitry that
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
The LM4802B is unity-gain stable. Its gain is set by external
resistors.
Key Specifications
j
Quiescent Power Supply Current
j
BTL Voltage Swing
(2μF + 30
load, 1% THD+N,
V
DD
= 3V)
j
Shutdown Current
12mA (typ)
12Vp-p (typ)
2μA (max)
Features
n
Pop & click circuitry eliminates noise during turn-on and
turn-off transitions
n
Low, 2μA (max) shutdown current
n
Low, 12mA (typ) quiescent current
n
12Vp-p mono BTL output, load = 2μF + 30
, V
DD
= 3V
n
Short circuit protection
n
Unity-gain stable
n
External gain configuration capability
Applications
n
Cellphone
n
PDA
Connection Diagram
LM4802BLQ (5x5)
20094184
Top View
Order Number LM4802BLQ
See NS Package Number 2LQAQ028
Boomer
is a registered trademark of National Semiconductor Corporation.
November 2004
A
2004 National Semiconductor Corporation
DS200941
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4802BLQ | 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 |
| LM4802BLQ/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 |
| LM4802BLQBD | 功能描述:音頻 IC 開發(fā)工具 LM4802BLQ EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)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 |
| LM4802BLQBD/NOPB | 制造商:Texas Instruments 功能描述:Evaluation Kit For Audio Power Amplifier With Boost Converter To Drive Ceramic Speakers |
| LM4802BLQX | 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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