LM4901MM datasheet(1/24 Pages) NSC

tên linh kiện	LM4901MM

Giải thích chi tiết về linh kiện	1.6 Watt Audio Power Amplifier with Selectable Shutdown Logic Level

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nhà sản xuất	NSC [National Semiconductor (TI)]

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LM4901

1.6 Watt Audio Power Amplifier with Selectable

Shutdown Logic Level

General Description

The LM4901 is an audio power amplifier primarily designed

for demanding applications in mobile phones and other por-

table communication device applications. It is capable of

delivering 1 watt of continuous average power to an 8

Ω BTL

load and 1.6 watts of continuous avearge power to a 4

Ω BTL

load with less than 1% distortion (THD+N) from a 5V

DC

power supply.

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4901 does not require output

coupling capacitors or bootstrap capacitors, and therefore is

ideally suited for mobile phone and other low voltage appli-

cations where minimal power consumption is a primary re-

quirement.

The LM4901 features a low-power consumption shutdown

mode. To facilitate this, Shutdown may be enabled by either

logic high or low depending on mode selection. Driving the

shutdown mode pin either high or low enables the shutdown

pin to be driven in a likewise manner to enable shutdown.

The LM4901 contains advanced pop & click circuitry which

eliminates noise which would otherwise occur during turn-on

and turn-off transitions.

The LM4901 is unity-gain stable and can be configured by

external gain-setting resistors.

Key Specifications

j Improved PSRR at 217Hz & 1KHz

62dB

j Power Output at 5.0V, 1% THD, 4

Ω

1.6W (typ)

j Power Output at 5.0V, 1% THD, 8

Ω

1.07W (typ)

j Power Output at 3.0V, 1% THD, 4

Ω

525mW (typ)

j Power Output at 3.0V, 1% THD, 8

Ω

390mW (typ)

j Shutdown Current

0.1µA (typ)

Features

n

Available in space-saving packages: LLP, micro SMD,

and MSOP

n

Ultra low current shutdown mode

n

BTL output can drive capacitive loads

n

Improved pop & click circuitry eliminates noise during

turn-on and turn-off transitions

n

2.0 - 5.5V operation

n

No output coupling capacitors, snubber networks or

bootstrap capacitors required

n

Unity-gain stable

n

External gain configuration capability

n

User selectable shutdown High or Low logic Level

Applications

n

Mobile Phones

n

PDAs

n

Portable electronic devices

Typical Application

Boomer® is a registered trademark of National Semiconductor Corporation.

20019801

FIGURE 1. Typical Audio Amplifier Application Circuit

December 2002

DS200198

www.national.com

Số phần tương tự - LM4901MM

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Texas Instruments	LM4901MMX	1Mb / 25P	1.6 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
Texas Instruments	LM4901MMX/NOPB	1Mb / 25P	1.6 Watt Audio Power Amplifier with Selectable Shutdown Logic Level

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Mô tả tương tự - LM4901MM

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
National Semiconductor ...	LM4876	247Kb / 9P	1.1W Audio Power Amplifier with Shutdown Logic Low
National Semiconductor ...	LM4990	728Kb / 19P	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
ON Semiconductor	NCP4894	164Kb / 18P	1.8 Watt Differential Audio Power Amplifier with Selectable Shutdown November, 2005 ??Rev. 8
ON Semiconductor	NCP4894	171Kb / 19P	1.8 Watt Differential Audio Power Amplifier with Selectable Shutdown January, 2007 ??Rev. 9
MOSA ELECTRONICS	MS6901	347Kb / 9P	Mono 1.1W Power Amplifier Selectable Shutdown Logic Level Low Voltage Operation
Unisonic Technologies	PA4894	494Kb / 11P	1.8 WATT DIFFERENTIAL AUDIO POWER AMPLIFIER WITH SELECTABLE SHUTDOWN
Texas Instruments	LM4876M	1,011Kb / 19P	1.1W Audio Power Amplifier with Logic Low Shutdown
	LM4901MMX	1Mb / 25P	1.6 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
	LM4990	1Mb / 28P	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
SG Micro Corp	SGM4996	1Mb / 16P	1.3W Fully Differential Audio Power Amplifier with Selectable Shutdown

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