LM4867MT

更新时间： 2024-01-19 15:49:11

品牌	Logo	应用领域
美国国家半导体 - NSC		商用集成电路电容器音频放大器
页数	文件大小	规格书
26页	765K
描述
Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function

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LM4867MT 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	TSSOP
包装说明：	TSSOP,	针数：	20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.33.00.01	风险等级：	5.82
标称带宽：	20 kHz	商用集成电路类型：	AUDIO AMPLIFIER
JESD-30 代码：	R-PDSO-G20	JESD-609代码：	e3
长度：	6.5 mm	湿度敏感等级：	1
信道数量：	2	功能数量：	1
端子数量：	20	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1.2 mm
最大压摆率：	15 mA	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	2 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	4.4 mm

LM4867MT 数据手册

February 2001

LM4867

Output-Transient-Free Dual 2.1W Audio Amplifier Plus

No Coupling Capacitor Stereo Headphone Function

General Description

Key Specifications

n P_Oat 1% THD+N

The LM4867 is a dual bridge-connected audio power ampli-

fier which, when connected to a 5V supply, will deliver 2.1W

to a 4Ω load (Note 1) or 2.4W to a 3Ω 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.

LM4867LQ, 3Ω load

LM4867LQ, 4Ω load

LM4867MTE, 4Ω

LM4867MT, 8Ω

2.4W (typ)

2.1W (typ)

1.9W (typ)

1.1W (typ)

n Single-ended mode - THD+N at 75mW into 32Ω

(max)

n Shutdown current

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

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 4Ω. The Mux control can also be used to

select two different closed-loop responses. LM4867MT will deliver 1.1W into

8Ω. See the Application Information sections for further information concern-

ing the LM4867LQ and the LM4867MT.

Applications

n Multimedia monitors

n Portable and desktop computers

n Portable audio systems

Note 2: An LM4867LQ or LM4867MTE that has been properly mounted to a

circuit board and forced-air cooled will deliver 2.4W into 3Ω.

Typical Application

DS200013-31

Refer to the Application Information section titled PROPER SELECTION OF EXTERNAL COMPONENTS for details concerning the value of C .

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.)

Boomer^®is a registered trademark of National Semiconductor Corporation.

DS200013

www.national.com

12 3 4 5 6 7...26

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与LM4867MT相关器件

型号	品牌	描述	获取价格	数据表
LM4867MT/NOPB	TI	1.5W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20, 4.40 MM, TSSOP-20	获取价格
LM4867MTE	NSC	Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphon	获取价格
LM4867MTE/NOPB	TI	3W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20, 6.50 X 4.40 MM, 0.90 MM HEIGHT, EXPOSED PAD, TSSOP	获取价格
LM4867MTEX	TI	3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20	获取价格
LM4867MTEX/NOPB	ROCHESTER	3W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20, 6.50 X 4.40 MM, 0.90 MM HEIGHT, EXPOSED PAD, PLAST	获取价格
LM4867MTEX/NOPB	TI	3W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20, 6.50 X 4.40 MM, 0.90 MM HEIGHT, EXPOSED PAD, PLAST	获取价格

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