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參數資料
| 型號： | LM4895MM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed 6dB Gain |
| 中文描述： | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| 封裝： | MSOP-10 |
| 文件頁數： | 1/15頁 |
| 文件大小： | 682K |
| 代理商： | LM4895MM |
LM4895
1 Watt Fully Differential Audio Power Amplifier With
Shutdown Select and Fixed 6dB Gain
General Description
The LM4895 is a fully differential audio power amplifier
primarily designed for demanding applications in mobile
phones and other portable communication device applica-
tions. It is capable of delivering 1 watt of continuous average
power to an 8
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 LM4895 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 LM4895 features a low-power consumption shutdown
mode. To facilitate this, Shutdown may be enabled by either
logic high or low depending on mode selection. Driving the
shutdown mode pin either high or low enables the shutdown
select pin to be driven in a likewise manner to enable Shut-
down. Additionally, the LM4895 features an internal thermal
shutdown protection mechanism.
The LM4895 contains advanced pop & click circuitry which
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
The LM4895 has an internally fixed gain of 6dB.
Key Specifications
j
Improved PSRR at 217Hz
j
Power Output at 5.0V & 1% THD
j
Power Output at 3.3V & 1% THD
j
Shutdown Current
80dB
1.0W(typ.)
400mW(typ.)
0.1μA(typ.)
Features
n
Fully differential amplification
n
Internal-gain-setting resistors
n
Available in space-saving packages micro SMD, MSOP
and LLP
n
Ultra low current shutdown mode
n
Can drive capacitive loads up to 500 pF
n
Improved pop & click circuitry eliminates noises 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
Shutdown high or low selectivity
Applications
n
Mobile phones
n
PDAs
n
Portable electronic devices
Typical Application
Boomer
is a registered trademark of National Semiconductor Corporation.
20023201
FIGURE 1. Typical Audio Amplifier Application Circuit
October 2002
L
G
2002 National Semiconductor Corporation
DS200232
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4895IBP | 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed 6dB Gain |
| LM494IN | Pulse Width Modulated Control Circuit |
| LM494 | Pulse Width Modulated Control Circuit |
| LM494CJ | Pulse Width Modulated Control Circuit |
| LM494CN | Pulse Width Modulated Control Circuit |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4895MM/NOPB | 功能描述:IC AMP AUDIO PWR 1.4W AB 10MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 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:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4897 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.1 Watt Audio Power Amplifier with Fade-In and Fade-Out |
| LM4897MM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.1 Watt Audio Power Amplifier with Fade-In and Fade-Out |
| LM4897MM/NOPB | 功能描述:IC AMP AUDIO PWR 1.1W AB 10MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 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:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4897MMX | 功能描述:IC AMP AUDIO PWR 1.1W AB 10MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 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:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
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