LM4875M Datasheet

IC型號(hào)：
LM4875M
PDF描述：
750 mW Audio Power Amplifier with DC Volume Control and Head...
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670.82KB
PDF頁數(shù)：
13頁
芯片廠家：
NSC

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LM4875 750 mW Audio Power Amplifier with DC Volume Control and Headphone Switch

January 2002

LM4875

750 mW Audio Power Amplifier with DC Volume Control

and Headphone Switch

General Description

The LM4875 is a mono bridged audio power amplifier with

DC voltage volume control. The LM4875 is capable of deliv-

ering 750mW of continuous average power into an 8鈩?load

with less than 1% THD when powered by a 5V power supply.

Switching between bridged speaker mode and headphone

(single ended) mode is accomplished using the headphone

sense pin. To conserve power in portable applications, the

LM4875鈥檚 micropower shutdown mode (I

= 0.7碌A(chǔ), typ) is

activated when less than 300mV is applied to the DC Vol/SD

pin.

Boomer audio power amplifiers are designed specifically to

provide high power audio output while maintaining high fidel-

ity. They require few external components and operate on

low supply voltages.

Applications

GSM phones and accessories, DECT, office phones

Hand held radio

Other portable audio devices

Key Specifications

at 1.0% THD+N into 8鈩?/div>

at 10% THD+N into 8鈩?/div>

Shutdown current

Supply voltage range

750mW (typ)

1W (typ)

0.7碌A(chǔ)(typ)

2.7V to 5.5V

Features

Precision DC voltage volume control

Headphone amplifier mode

鈥淐lick and pop鈥?suppression

Shutdown control when volume control pin is low

Thermal shutdown protection

Typical Application

Connection Diagram

Small Outline Package (SO)

Mini Small Outline Package (MSOP)

10104202

Top View

Order Number LM4875M, LM4875MM

See NS Package Number M08A, MUA08A

10104201

FIGURE 1. Typical Audio Amplifier

Application Circuit

BOOMER

鈩?/div>

is a trademark of National Semiconductor Corporation.

漏 2004 National Semiconductor Corporation

DS101042

www.national.com

制造商
National Semiconductor (TI)
產(chǎn)品
Class-AB
輸出功率
1 W x 1 at 8 Ohms, 0.11 W x 2 at 32 Ohms
輸出類型
1-Channel Mono, 2-Channel Stereo
可用增益調(diào)整
72 dB
THD + 噪聲
0.6 %
工作電源電壓
3 V, 5 V
最大工作溫度
+ 85 C
安裝風(fēng)格
SMD/SMT
封裝 / 箱體
SOIC-8 Narrow
封裝
Tube
音頻負(fù)載電阻
32 Ohms
輸入信號(hào)類型
Single
最小工作溫度
- 40 C
輸出信號(hào)類型
Differential, Single
電源類型
Single
Supply Voltage - Max
5.5 V
Supply Voltage - Min
2.7 V

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