LM4838MT National Semiconductor, LM4838MT Datasheet

LM4838MT

Manufacturer Part Number

LM4838MT

Description

Manufacturer

National Semiconductor

Datasheets

1.LM4838MTX.pdf (38 pages)

2.LM4838MTE.pdf (36 pages)

3.LM4838MTE.pdf (36 pages)

Specifications of LM4838MT

Case

SSOP-28

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM4838MTE

Manufacturer:

Quantity:

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM4838MTE

Manufacturer:

national

Quantity:

3 767

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM4838MTE

Quantity:

190

Company:

BOSTOCK HK LIMITED

Part Number:

LM4838MTE

Manufacturer:

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM4838MTE

Manufacturer:

NS/国半

Quantity:

20 000

Company:

H&T Electronics

Part Number:

LM4838MTE

Quantity:

1 400

Company:

BOSTOCK HK LIMITED

Part Number:

LM4838MTEX

Manufacturer:

NS/PBF

Quantity:

269

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM4838MTEX

Manufacturer:

NS/国半

Quantity:

20 000

Company:

Allchip Electronic(HK) Limited

Part Number:

LM4838MTEX

Manufacturer:

Quantity:

3 253

Company:

Allchip Electronic(HK) Limited

Part Number:

LM4838MTEX

Manufacturer:

Quantity:

6 922

Company:

H&T Electronics

Part Number:

LM4838MTEX

Quantity:

569

Company:

BOSTOCK HK LIMITED

Part Number:

LM4838MTX

Manufacturer:

NSC

Quantity:

10 000

Company:

Allchip Electronic(HK) Limited

Part Number:

LM4838MTX

Manufacturer:

Quantity:

8 773

Current page: 1 of 38
Download datasheet (3Mb)

LM4838

Stereo 2W Audio Power Amplifiers

with DC Volume Control and Selectable Gain

General Description

The LM4838 is a monolithic integrated circuit that provides

DC volume control, and stereo bridged audio power amplifi-

ers capable of producing 2W into 4Ω (Note 1) with less than

1.0% THD or 2.2W into 3Ω (Note 2) with less than 1.0%

THD.

Boomer

to provide high quality audio while requiring a minimum

amount of external components. The LM4838 incorporates a

DC volume control, stereo bridged audio power amplifiers

and a selectable gain or bass boost, making it optimally

suited for multimedia monitors, portable radios, desktop, and

portable computer applications.

The LM4838 features an externally controlled, low-power

consumption shutdown mode, and both a power amplifier

and headphone mute for maximum system flexibility and

performance.

Note 1: When properly mounted to the circuit board, the LM4838LQ,

LM4838MTE, and LM4838GR will deliver 2W into 4Ω. The LM4838MT and

LM4838ITL will deliver 1.1W into 8Ω. See Application Information section

Exposed-DAP package PCB Mounting Considerations for more informa-

tion.

Note 2: An LM4838LQ and LM4838MTE that have been properly mounted

to the circuit board and forced-air cooled will deliver 2.2W into 3Ω.

Block Diagram

Boomer

is a registered trademark of NationalSemiconductor Corporation.

audio integrated circuits were designed specifically

DS200133

FIGURE 1. LM4838 Block Diagram

Key Specifications

n P

n Single-ended mode - THD+N at 85mW into

n Shutdown current

Features

n DC Volume Control Interface

n System Beep Detect

n Stereo switchable bridged/single-ended power amplifiers

n Selectable internal/external gain and bass boost

n “Click and pop” suppression circuitry

n Thermal shutdown protection circuitry

Applications

n Portable and Desktop Computers

n Multimedia Monitors

n Portable Radios, PDAs, and Portable TVs

32Ω

into 3Ω (LQ & MTE)

into 4Ω (LQ, MTE, GR)

into 8Ω (MT, MTE, ITL, LQ, & GR)

at 1% THD+N

20013301

November 2004

www.national.com

0.7µA (typ)

2.2W (typ)

2.0W (typ)

1.1W (typ)

1.0%(typ)

Related parts for LM4838MT

Related keywords

LM4838MT datasheet
LM4838MT data sheet
LM4838MT pdf datasheet
LM4838MT component
LM4838MT part
LM4838MT distributor
LM4838MT RoHS
LM4838MT datasheet download