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參數資料
| 型號： | LM4867LQ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function |
| 中文描述： | 3 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC24 |
| 封裝： | EXPOSED PAD, LLP-24 |
| 文件頁數： | 1/26頁 |
| 文件大小： | 763K |
| 代理商： | LM4867LQ |
LM4867
Output-Transient-Free Dual 2.1W Audio Amplifier Plus
No Coupling Capacitor Stereo Headphone Function
General Description
The LM4867 is a dual bridge-connected audio power ampli-
fier which, when connected to a 5V supply, will deliver 2.1W
to a 4
load (Note 1) or 2.4W to a 3
load (Note 2) with less
than 1.0% THD+N. The LM4867 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. A MUX control pin allows selec-
tion between the two sets of stereo input signals. The MUX
control can also be used to select between two different
customer-specified closed-loop responses.
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 LM4867 combines dual bridge
speaker amplifiers and stereo headphone amplifiers in one
package.
The LM4867 features an externally controlled power-saving
micropower shutdown mode, a stereo headphone amplifier
mode, and thermal shutdown protection.
Note 1:
An LM4867LQ or LM4867MTE 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. LM4867MT will deliver 1.1W into
8
. See the Application Information sections for further information concern-
ing the LM4867LQ and the LM4867MT.
Note 2:
An LM4867LQ or LM4867MTE 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
LM4867LQ, 3
load
n
LM4867LQ, 4
load
n
LM4867MTE, 4
n
LM4867MT, 8
n
Single-ended mode - THD+N at 75mW into 32
(max)
n
Shutdown current
2.4W (typ)
2.1W (typ)
1.9W (typ)
1.1W (typ)
0.5%
0.7μA (typ)
Features
n
Advanced “click and pop” suppression circuitry
n
Eliminates headphone amplifier output coupling
capacitors
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
Typical Application
Boomer
is a registered trademark of National Semiconductor Corporation.
DS200013-31
*
Refer to the Application Information section titled PROPER SELECTION OF EXTERNAL COMPONENTS for details concerning the value of C
B
.
FIGURE 1. Typical Audio Amplifier Application Circuit
(Pin out shown for the 24-pin Exposed-DAP LLP package. Numbers in ( ) are for the 20-pin MTE and MT
packages.)
February 2001
L
H
2001 National Semiconductor Corporation
DS200013
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4867MT | Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function |
| LM4867MTE | Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function |
| LM4868 | Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function |
| LM4868MTE | Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function |
| LM4868LQ | Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4867LQ/NOPB | 制造商:Texas Instruments 功能描述:Audio Amp Headphone/Speaker 2-CH Stereo 3W Class-AB 24-Pin LLP EP T/R |
| LM4867MT | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function |
| LM4867MT NOPB | 制造商:Texas Instruments 功能描述:Audio Amp Headphone/Speaker 2-CH Stereo 1.5W Class-AB 20-Pin TSSOP Rail |
| LM4867MT/NOPB | 功能描述:IC AMP AUDIO PWR 3W AB 20TSSOP 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) |
| LM4867MTE | 制造商:Texas Instruments 功能描述:Audio Amp Headphone/Speaker 2-CH Stereo 3W Class-AB 20-Pin TSSOP EP Rail |
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