參數(shù)資料
型號(hào)： LM4980
廠商： National Semiconductor Corporation
英文描述： 2 Cell Battery, 1mA, 42mW Per Channel High Fidelity Stereo Headphone Audio Amplifier for MP3 players
中文描述： 2節(jié)電池，1mA的，每通道高保真立體聲耳機(jī)音頻放大器42mW MP3播放器
文件頁(yè)數(shù)： 1/20頁(yè)
文件大小： 1324K
代理商： LM4980
LM4980
2 Cell Battery, 1mA, 42mW Per Channel High Fidelity
Stereo Headphone Audio Amplifier for MP3 players
General Description
The LM4980 is a stereo headphone audio amplifier, which
when connected to a 3.0V supply, delivers 42mW to a 16
load with less than 1% THD+N. With the LM4980 packaged
in the SD package, the customer benefits include low profile
and small size. This package minimizes PCB area and maxi-
mizes output power.
The LM4980 features circuitry that significantly reduces out-
put transients (“clicks” and “pops”) while driving headphones
during device turn-on and turn-off without costly external
additional circuitry. The LM4980 also includes an externally
controlled low-power consumption active-low shutdown
mode, and thermal shutdown. Boomer audio power amplifi-
ers are designed specifically to use few external compo-
nents and provide high quality output power in a surface
mount package.
Key Specifications
j
Output power
(RL = 16
, V
DD
= 3.0V, THD+N = 1%)
j
Quiescent current (V
DD
= 3V)
j
Micropower shutdown current
j
Supply voltage operating range
j
PSRR
@
1kHz, V
DD
= 3.0V
j
PSRR
@
217Hz, V
DD
= 3.0V
42mW (typ)
1mA (typ)
0.1μA (typ)
1.5V
<
V
DD
<
3.3V
90dB (typ)
100dB (typ)
Features
n
2-cell 1.5V to 3.3V battery operation
n
Unity-gain stable
n
“Click and pop” suppression circuitry for shutdown and
power on/off transient with headphone loads
n
Active low micro-power shutdown
n
Thermal shutdown protection circuitry
Applications
n
Portable two-cell audio products
n
Portable two-cell electronic devices
n
Portable MP3 player/recorders
Typical Application
Boomer
is a registered trademark of National Semiconductor Corporation.
20142901
FIGURE 1. Block Diagram
July 2005
L
f
2005 National Semiconductor Corporation
DS201429
www.national.com
相關(guān)PDF資料
PDF描述
LM4980SD 2 Cell Battery, 1mA, 42mW Per Channel High Fidelity Stereo Headphone Audio Amplifier for MP3 players
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LM4992 420mW Stereo Cell Phone Audio Amplifier
LM5041 Cascaded PWM Controller
LM5041MTC Cascaded PWM Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4980SD 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
LM4980SD/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
LM4980SDBD 功能描述:音頻 IC 開(kāi)發(fā)工具 LM4980 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
LM4980SDX 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
LM4980SDX/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
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