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參數資料
| 型號： | LM4874 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown |
| 中文描述： | 2.1W差分輸入，BTL輸出立體聲音頻放大器可選增益和關機 |
| 文件頁數： | 1/21頁 |
| 文件大?。?/td> | 869K |
| 代理商： | LM4874 |
LM4874
2.1W Differential Input, BTL Output Stereo Audio
Amplifier with Selectable Gain and Shutdown
General Description
The LM4874 features differential stereo inputs, BTL (bridge-
tied load) outputs, and four externally selectable fixed gains.
Operating on a single 5V supply, the LM4874 delivers 1.2W,
1.9W, or 2.1W (typ) of output power to an 8
, 4
, or 3
BTL
load (Note 1), respectively, with less than 1% THD+N. The
LM4874’s gain is selected using two digital inputs. The nomi-
nal gain values are 6dB, 10dB, 15.6dB, and 21.6dB.
The LM4874 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
= 3
, V
DD
= 5.0V, and THD+N = 1%
j
BTL output power
R
L
= 4
, V
DD
= 5.0V, and THD+N = 1%
2.1W (typ)
1.9W (typ)
j
BTL output power
R
L
= 8
, V
DD
= 5.0V, and THD+N = 1%
j
Micropower shutdown current
j
PSRR (
@
1kHz, V
DD
= 5V, (Fig.1))
1.2W (typ)
0.1μA (typ)
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
3.0V 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
20046902
Order Number LM4874MH
See NS Package Number MXA20A for Exposed-DAP TSSOP
Boomer
is a registered trademark of National Semiconductor Corporation.
August 2002
L
a
2002 National Semiconductor Corporation
DS200469
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4874MH | 2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown |
| LM4876 | 1.1W Audio Power Amplifier with Shutdown Logic Low |
| LM4876M | 1.1W Audio Power Amplifier with Shutdown Logic Low |
| LM4878IBP | 1 Watt Audio Power Amplifier in micro SMD package with Shutdown Logic Low |
| LM4878 | 1 Watt Audio Power Amplifier in micro SMD package with Shutdown Logic Low |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4874MH | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown |
| LM4874MH/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) |
| LM4875 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:750 mW Audio Power Amplifier with DC Volume Control and Headphone Switch |
| LM4875M | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4875M/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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