LM4953SD Datasheet

IC型號(hào)：
LM4953SD
PDF描述：
National Semiconductor [Ground-Referenced, Ultra Low Noise,...
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LM4953 Ground-Referenced, Ultra Low Noise, Ceramic Speaker Driver

September 2005

LM4953

Ground-Referenced, Ultra Low Noise, Ceramic Speaker

Driver

General Description

The LM4953 is an audio power amplifier designed for driving

Ceramic Speaker in portable applications. When powered by

a 3.6V supply, it is capable of forcing 12.6Vpp across a 2碌F

+ 30鈩?bridge-tied-load (BTL) with less than 1% THD+N.

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4953 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 LM4953 features a low-power consumption shutdown

mode. Additionally, the LM4953 features an internal thermal

shutdown protection mechanism.

The LM4953 contains advanced pop & click circuitry that

eliminates noises which would otherwise occur during

turn-on and turn-off transitions.

The LM4953 is unity-gain stable and can be configured by

external gain-setting resistors.

Key Specifications

Quiescent Power Supply Current (V

= 3V) 7mA(typ)

BTL Voltage Swing

(2碌F+30鈩?load, 1% THD+N,

= 3.6V)

Shutdown Current

12.6V

(typ)

1碌A(chǔ) (max)

Features

Pop & click circuitry eliminates noise during turn-on and

turn-off transitions

Low, 1碌A(chǔ) (max) shutdown current

Low, 7mA (typ) quiescent current

12.6Vpp mono BTL output, load = 2碌F+ 30鈩?/div>

Thermal shutdown

Unity-gain stable

External gain configuration capability

Applications

Cellphone

PDA

Typical Application

20142168

FIGURE 1. Typical Application Circuit

Boomer

廬

is a registered trademark of National Semiconductor Corporation.

漏 2005 National Semiconductor Corporation

DS201421

www.national.com

制造商
National Semiconductor (TI)
產(chǎn)品
Class-AB
輸出類(lèi)型
1-Channel Mono
THD + 噪聲
0.02 %
工作電源電壓
3 V
最大工作溫度
+ 85 C
封裝 / 箱體
LLP EP
封裝
Reel
音頻負(fù)載電阻
30 Ohms
輸入信號(hào)類(lèi)型
Single
最小工作溫度
- 40 C
輸出信號(hào)類(lèi)型
Single
電源類(lèi)型
Single
Supply Voltage - Max
4.2 V
Supply Voltage - Min
1.6 V

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