lm4674atl National Semiconductor Corporation, lm4674atl Datasheet

lm4674atl

Manufacturer Part Number

lm4674atl

Description

Filterless 2.5w Stereo Class D Audio Power Amplifier

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM4674ATL.pdf (18 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

lm4674atlX

Quantity:

Company:

Meier Automation Equipment Co., Limited

Part Number:

lm4674atlX

Manufacturer:

NS/国半

Quantity:

20 000

Company:

Allchip Electronic(HK) Limited

Part Number:

lm4674atlX

Manufacturer:

Quantity:

12 523

Company:

Allchip Electronic(HK) Limited

Part Number:

lm4674atlX

Manufacturer:

NSC

Quantity:

9 794

Company:

Meier Automation Equipment Co., Limited

Part Number:

lm4674atlX/NOPB

Manufacturer:

NS/国半

Quantity:

20 000

Current page: 1 of 18
Download datasheet (428Kb)

LM4674A

Filterless 2.5W Stereo Class D Audio Power Amplifier

General Description

The LM4674A is a single supply, high efficiency, 2.5W/

channel, filterless switching audio amplifier. A low noise

PWM architecture eliminates the output filter, reducing ex-

ternal component count, board area consumption, system

cost, and simplifying design.

The LM4674A is designed to meet the demands of mobile

phones and other portable communication devices. Operat-

ing from a single 5V supply, the device is capable of deliv-

ering 2.5W/channel of continuous output power to a 4Ω load

with less than 10% THD+N. Flexible power supply require-

ments allow operation from 2.4V to 5.5V.

The LM4674A features high efficiency compared to conven-

tional Class AB amplifiers. When driving an 8Ω speaker from

a 3.6V supply, the device features 85% efficiency at P

500mW. Four gain options are pin selectable through the

GAIN0 and GAIN1 pins.

Output short circuit protection prevents the device from be-

ing damaged during fault conditions. Superior click and pop

suppression eliminates audible transients on power-up/down

and during shutdown. Independent left/right shutdown con-

trols maximizes power savings in mixed mono/stereo appli-

cations.

Boomer

is a registered trademark of National Semiconductor Corporation.

DS201961

Key Specifications

Features

n Output Short Circuit Protection

n Stereo Class D operation

n No output filter required

n Logic selectable gain

n Independent shutdown control

n Minimum external components

n Click and Pop suppression

n Micro-power shutdown

n Available in space-saving 2mm x 2mm x 0.6mm micro

Applications

n Mobile phones

n PDAs

n Laptops

SMD package

at 3.6V supply

Efficiency at 3.6V, 100mW into 8Ω

Efficiency at 3.6V, 500mW into 8Ω

Efficiency at 5V, 1W into 8Ω

Quiescent Power Supply Current

Power Output at V

Shutdown current

= 4Ω, THD ≤ 10%

= 8Ω, THD ≤ 10%

= 5V,

September 2006

www.national.com

0.1µA (typ)

2.5W (typ)

1.5W (typ)

80% (typ)

85% (typ)

4mA

Related parts for lm4674atl

Related keywords

lm4674atl datasheet
lm4674atl data sheet
lm4674atl pdf datasheet
lm4674atl component
lm4674atl part
lm4674atl distributor
lm4674atl RoHS
lm4674atl datasheet download