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MUA08A Datasheet

IC型号：
MUA08A
PDF描述：
265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mod...
文件大小：
774.96KB
PDF页数：
19页
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

n

MSOP, LLP, and SOP packaging

n

No output coupling capacitors, bootstrap capacitors, or

snubber circuits are necessary

n

Thermal shutdown protection circuitry

n

Unity-gain stable

n

External gain configuration capability

n

Latest generation 鈥檆lick and pop鈥?suppression circuitry

Applications

n

Cellular phones

n

PDA鈥檚

n

Any portable audio application

Key Specifications

j

THD+N at 1kHz for 265mW continuous

average output power into 8鈩?

V

DD

= 3.3V

j

THD+N at 1kHz for 675mW continuous

1.0% (max)

average output power into 8鈩?

V

DD

= 5V

j

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

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