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參數資料
| 型號： | LM4869MHX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封裝： | EXPOSED PAD, TSSOP-20 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 836K |
| 代理商： | LM4869MHX/NOPB |
LM4869
1.9W Differential Input, BTL Output Stereo Audio
Amplifier with Selectable Gain and Shutdown
General Description
The LM4869 features differential stereo inputs, BTL (bridge-
tied load) outputs, and four externally selectable fixed gains.
Operating on a single 5V supply, the LM4869 delivers 1.2W
and 1.9W (typ) of output power to an 8
and 4 BTL load
(Note 1), respectively, with less than 1% THD+N. The
LM4869’s gain is selected using two digital inputs. The nomi-
nal gain values are 6dB, 10dB, 15.6dB, and 21.6dB.
The LM4869 is designed for notebook and other handheld
portable applications. It delivers high quality output power
from a surface-mount package and requires few external
components.
Other features include an active-low micropower shutdown
mode input and thermal shutdown protection.
Key Specifications
j BTL output Power
R
L =4
,V
DD = 5.0V, and THD+N = 1%
1.9W (typ)
j BTL output Power
R
L =8
,V
DD = 5.0V, and THD+N = 1%
1.2W (typ)
j Micropower shutdown current
0.1A (typ)
j PSRR (@ 1kHz, VDD = 5V, (Fig.1))
62dB (typ)
Features
n
Fully differential input and output
n
Internal gain set: 6dB, 10dB, 15.6dB, and 21.6dB
n
Improved ’click and pop’ suppression
n
Thermal shutdown protection circuit
n
Ultra low current micropower shutdown mode
n
2.0V to 5.5V operation
n
Available in space-saving exposed-DAP TSSOP
package
Applications
n
Notebook computers
n
PDAs
n
Portable electronic devices
Connection Diagram
Top View
20042802
Order Number LM4869MH
See NS Package Number MXA20A for Exposed-DAP TSSOP
Boomer is a registered trademark of National Semiconductor Corporation.
August 2002
LM4869
1.9W
Differential
Input,
BTL
Output
Stereo
Audio
Amplifier
with
Selectable
Gain
and
Shutdown
2002 National Semiconductor Corporation
DS200428
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4870MX | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| LM4871MDA | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4871MWA | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4871N/NOPB | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PDIP8 |
| LM4872IBPX/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| LM4870MX | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM4871 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3W Audio Power Amplifier with Shutdown Mode |
| LM4871_03 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3W Audio Power Amplifier with Shutdown Mode |
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