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參數(shù)資料
| 型號(hào)： | LM4868MT/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-20 |
| 文件頁(yè)數(shù)： | 1/28頁(yè) |
| 文件大小： | 792K |
| 代理商： | LM4868MT/NOPB |
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LM4868
Output-Transient-Free Dual 2.1W Audio Amplifier Plus
No Coupling Capacitor Stereo Headphone Function
General Description
The LM4868 is a dual bridge-connected audio power ampli-
fier which, when connected to a 5V supply, will deliver 2.1W
toa4
than 1.0% THD+N. The LM4868 uses advanced, latest gen-
eration circuitry to eliminate all traces of clicks and pops
when the supply voltage is first applied. The amplifier has a
headphone-amplifier-select input pin. It is used to switch the
amplifiers from bridge to single-ended mode for driving
headphones. A new circuit topology eliminates headphone
output coupling capacitors (patent pending). A MUX control
pin allows selection between the two sets of stereo input
signals. The MUX control can also be used to select be-
tween two different customer-specified closed-loop re-
sponses.
Boomer audio power amplifiers are designed specifically to
provide high quality output power from a surface mount
package and require few external components. To simplify
audio system design, the LM4868 combines dual bridge
speaker amplifiers and stereo headphone amplifiers in one
package.
The LM4868 features an externally controlled power-saving
micropower shutdown mode, a stereo headphone amplifier
mode, and thermal shutdown protection.
Note 1: An LM4868LQ or LM4868MTE that has been properly mounted to
a circuit board will deliver 2.1W into 4
. The Mux control can also be used to
select two different closed-loop responses. LM4868MT will deliver 1.1W into
8
. See the Application Information sections for further information concern-
ing the LM4868LQ and the LM4868MT.
Note 2: An LM4868LQ or LM4868MTE that has been properly mounted to a
circuit board and forced-air cooled will deliver 2.4W into 3
.
Key Specifications
n
P
O at 1% THD+N
n
LM4868LQ, 3
load
2.4W (typ)
n
LM4868LQ, 4
load
2.1W (typ)
n
LM4868MTE, 4
1.9W (typ)
n
LM4868MT, 8
1.1W (typ)
n
Single-ended mode - THD+N at 75mW into 32
0.5%
(max)
n
Shutdown current
0.7A (typ)
Features
n
Advanced “click and pop” suppression circuitry
n
Eliminates headphone amplifier output coupling
capacitors (patent pending)
n
Stereo headphone amplifier mode
n
Input mux control and two separate inputs per channel
n
Thermal shutdown protection circuitry
n
LLP, TSSOP, and exposed-DAP TSSOP packaging
available
Applications
n
Multimedia monitors
n
Portable and desktop computers
n
Portable audio systems
Connection Diagrams
20026758
Top View
Order Number LM4868MT, LM4868MTE
See NS Package Number MTC20 for TSSOP
See NS Package Number MXA20A for Exposed-DAP TSSOP
Boomer is a registered trademark of National Semiconductor Corporation.
August 2002
LM4868
Output-T
ransient-Free
Dual
2.1W
Audio
Amplifier
Plus
No
Coupling
Capacitor
Stereo
Headphone
Function
2002 National Semiconductor Corporation
DS200267
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4868MTX/NOPB | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| LM4868LQ/NOPB | 3 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC24 |
| LM4868LQX/NOPB | 3 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC24 |
| LM4869MH/NOPB | 2.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| LM4869MHX/NOPB | 2.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4869 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.9W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown |
| LM4869MH | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.9W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown |
| LM4869MH/NOPB | 功能描述:IC AMP AUDIO PWR 2.6W AB 20TSSOP RoHS:是 類別: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® 類型:H 類 輸出類型: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) |
| LM4870 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.1W Audio Power Amplifier with Shutdown Mode |
| LM4870M | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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