LM4900MM Datasheet

IC型号：
LM4900MM
PDF描述：
National Semiconductor [265mW at 3.3V Supply Audio Power Am...
文件大小：
774.51KB
芯片厂家：
NSC

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LM4900 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode

September 2001

LM4900

265mW at 3.3V Supply Audio Power Amplifier with

Shutdown Mode

General Description

The LM4900 is a bridged audio power amplifier capable of

delivering 265mW of continuous average power into an 8鈩?/div>

load with 1% THD+N from a 3.3V power supply.

Boomer

庐

audio power amplifiers were designed specifically

to provide high quality output power from a low supply volt-

age while requiring a minimal amount of external compo-

nents. Since the LM4900 does not require output coupling

capacitors, bootstrap capacitors or snubber networks, it is

optimally suited for low-power portable applications.

The LM4900 features an externally controlled, low power

consumption shutdown mode, and thermal shutdown protec-

tion.

The closed loop response of the unity-gain stable LM4900

can be configured by external gain-setting resistors.

Features

MSOP, LLP, and SOP packaging

No output coupling capacitors, bootstrap capacitors, or

snubber circuits are necessary

Thermal shutdown protection circuitry

Unity-gain stable

External gain configuration capability

Latest generation 鈥檆lick and pop鈥?suppression circuitry

Applications

Cellular phones

PDA鈥檚

Any portable audio application

Key Specifications

THD+N at 1kHz for 265mW continuous

average output power into 8鈩?

= 3.3V

THD+N at 1kHz for 675mW continuous

1.0% (max)

average output power into 8鈩?

= 5V

Shutdown current

1.0% (max)

0.1碌A (typ)

Typical Application

DS200064-1

FIGURE 1. Typical Audio Amplifier Application Circuit

Boomer

庐

is a registered trademark of National Semiconductor Corporation.

漏 2001 National Semiconductor Corporation

DS200064

www.national.com

音频放大类别:
AB
通道数:
1
输出功率:
265mW
电源电压范围:
2V 到 5.5V
负载阻抗:
8ohm
工作温度范围:
0°C 到 +125°C
封装类型:
MSOP
针脚数:
16
SVHC(高度关注物质):
No SVHC (19-Dec-2011)
功率, 有效值:
675mW
器件标号:
4900
封装类型:
LLP
工作温度敏:
0°C
工作温度最高:
125°C
放大器数目:
2
放大器类型:
功率
电源电压最大:
5.5V
电源电压最小:
2V
表面安装器件:
表面安装
负载阻抗, 最小:
8ohm
额定电源电压, +:
6V

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