LM4950TA Datasheet

IC型號：
LM4950TA
PDF描述：
7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier
文件大小：
1441.84KB
PDF頁數(shù)：
25頁
芯片廠家：
NSC

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LM4950 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier

August 2004

LM4950

7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier

General Description

The LM4950 is a dual audio power amplifier primarily de-

signed for demanding applications in flat panel monitors and

TV鈥檚. It is capable of delivering 3.1 watts per channel to a 4鈩?/div>

single-ended load with less than 1% THD+N or 7.5 watts

mono BTL to an 8鈩?load, with less than 10% THD+N from a

12V

power supply.

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4950 does not require boot-

strap capacitors or snubber circuits. Therefore, it is ideally

suited for display applications requiring high power and mini-

mal size.

The LM4950 features a low-power consumption active-low

shutdown mode. Additionally, the LM4950 features an inter-

nal thermal shutdown protection mechanism along with short

circuit protection.

The LM4950 contains advanced pop & click circuitry that

eliminates noises which would otherwise occur during

turn-on and turn-off transitions.

The LM4950 is a unity-gain stable and can be configured by

external gain-setting resistors.

Key Specifications

Quiscent Power Supply Current

OUT

(SE)

16mA (typ)

3.1W (typ)

7.5W (typ)

40碌A(chǔ) (typ)

= 12V, R

= 4鈩? 1% THD+N

OUT

(BTL)

= 12V, R

= 8鈩? 10% THD+N

Shutdown current

Features

Pop & click circuitry eliminates noise during turn-on and

turn-off transitions

Low current, active-low shutdown mode

Low quiescent current

Stereo 3.1W output, R

= 4鈩?/div>

Mono 7.5W BTL output, R

= 8鈩?/div>

Short circuit protection

Unity-gain stable

External gain configuration capability

Applications

Flat Panel Monitors

Flat panel TV鈥檚

Computer Sound Cards

Typical Application

20047078

FIGURE 1. Typical Bridge-Tied-Load (BTL) Audio Amplifier Application Circuit

Boomer

廬

is a registered trademark of National Semiconductor Corporation.

漏 2004 National Semiconductor Corporation

DS200470

www.national.com

音頻放大類別:
AB
通道數(shù):
2
輸出功率:
7.5W
電源電壓范圍:
9.6V 到 16V
總諧波失真(THD)+噪聲:
0.05% @ 2.5W, 4ohm, VDD=12V
負(fù)載阻抗:
4ohm
工作溫度范圍:
-40°C 到 +85°C
封裝類型:
TO-220
針腳數(shù):
9
SVHC(高度關(guān)注物質(zhì)):
No SVHC (19-Dec-2011)
功率, 有效值:
7.5W
器件標(biāo)號:
4950
封裝類型:
TO-220
工作溫度敏:
-40°C
工作溫度最高:
85°C
帶寬:
20kHz
放大器數(shù)目:
2
放大器類型:
功率
電源電壓最大:
16V
電源電壓最小:
9.6V
芯片標(biāo)號:
4950
表面安裝器件:
通孔安裝
負(fù)載阻抗, 最小:
4ohm
額定電源電壓, +:
16V

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