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參數(shù)資料
| 型號(hào)： | LM4905 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1 Watt Audio Power Amplifier |
| 中文描述： | 1瓦音頻功率放大器 |
| 文件頁(yè)數(shù)： | 1/17頁(yè) |
| 文件大小： | 686K |
| 代理商： | LM4905 |
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LM4905
1 Watt Audio Power Amplifier
General Description
The LM4905 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 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 LM4905 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 LM4905 features a low-power consumption shutdown
mode, which is achieved by driving the shutdown pin with
logic low. Additionally, the LM4905 features an internal ther-
mal shutdown protection mechanism.
The LM4905 contains advanced pop & click circuitry which
eliminates noise which would otherwise occur during turn-on
and turn-off transitions.
The LM4905 is unity-gain stable and can be configured by
external gain-setting resistors.
Key Specifications
j
Improved PSRR at 217Hz & 1KHz
j
Power Output at 5.0V, 1% THD, 8
j
Power Output at 3.0V, 1% THD, 8
j
Shutdown Current
62dB
1.07W (typ)
390mW (typ)
0.1μA (typ)
Features
n
Available in space-saving LLP package
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
2.2 - 5.5V operation
n
No output coupling capacitors, snubber networks or
bootstrap capacitors required
n
Unity-gain stable
n
External gain configuration capability
Applications
n
Mobile Phones
n
PDAs
n
Portable electronic devices
Typical Application
Boomer
is a registered trademark of National Semiconductor Corporation.
200508D3
FIGURE 1. Typical Audio Amplifier Application Circuit
July 2003
L
2003 National Semiconductor Corporation
DS200508
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4905LD | 1 Watt Audio Power Amplifier |
| LM4905LQ | 1 Watt Audio Power Amplifier |
| LM4905MM | 1 Watt Audio Power Amplifier |
| LM4911 | Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output |
| LM4911MM | Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4905LD | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LM4905LD/NOPB | 功能描述:IC AMP AUDIO PWR 1.07W MONO 8LLP RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類(lèi)型:H 類(lèi) 輸出類(lèi)型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類(lèi)型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4905LDX | 功能描述:IC AMP AUDIO PWR 1.07W MONO 8LLP RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類(lèi)型:H 類(lèi) 輸出類(lèi)型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類(lèi)型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4905LQ | 制造商:Texas Instruments 功能描述:AMP AUDIO POWER 1W SMD LLP-28 |
| LM4905LQ/NOPB | 功能描述:IC AMP AUDIO PWR 1.07W MONO 8LLP RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類(lèi)型:H 類(lèi) 輸出類(lèi)型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類(lèi)型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
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