LM4919MM Datasheet

IC型號：
LM4919MM
PDF描述：
1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Ampl...
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565.87KB
PDF頁數(shù)：
15頁
芯片廠家：
NSC

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LM4919 1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier

May 2004

LM4919

1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone

Audio Amplifier

General Description

The unity gain stable LM4919 is both a mono-BTL audio

power amplifier and a Single Ended (SE) stereo headphone

amplifier. Operating on a single 1.5V supply, the mono BTL

mode delivers 85mW into an 8鈩?load at 1% THD+N. In

Single Ended stereo headphone mode, the amplifier delivers

14mW per channel into a 16鈩?load at 1% THD+N.

With the LM4919 packaged in the MM package, the cus-

tomer benefits include low profile and small size. This pack-

age minimizes PCB area and maximizes output power.

The LM4919 features circuitry that reduces output transients

("clicks" and "pops") during device turn-on and turn-off, an

externally controlled, low-power consumption, active-low

shutdown mode, and thermal shutdown. Boomer audio

power amplifiers are designed specifically to use few exter-

nal components and provide high quality output power in a

surface mount package.

Key Specifications

Mono-BTL output power

= 8鈩? V

= 1.5V, THD+N = 1%)

85mW (typ)

Stereo Headphone output power

= 16鈩? V

= 1.5V, THD+N = 1%)

14mW (typ)

Micropower shutdown current

0.02碌A (typ)

Supply voltage operating range

0.9V

2.5V

PSRR 1kHz, V

= 1.5V, R

= 16鈩?/div>

72dB (typ)

Features

Single-cell 0.9V to 2.5V battery operation

BTL mode for mono speaker

Single ended headphone operation with coupling

capacitors

Unity-gain stable

"Click and pop" suppression circuitry

Active low micropower shutdown

Low current, active-low mute mode

Thermal shutdown protection circuitry

Applications

Portable one-cell audio products

Portable one-cell electronic devices

Typical Application

20082101

FIGURE 1. Block Diagram

Boomer

廬

is a registered trademark of National Semiconductor Corporation.

漏 2004 National Semiconductor Corporation

DS200821

www.national.com

通道數(shù):
1
輸出功率:
85mW
工作溫度范圍:
-40°C 到 +85°C
針腳數(shù):
10
SVHC(高度關注物質(zhì)):
No SVHC (19-Dec-2011)
功率, 有效值:
85mW
變化斜率:
2.5V/ms
器件標號:
4919
封裝類型:
MSOP
工作溫度敏:
-40°C
工作溫度最高:
85°C
放大器數(shù)目:
2
放大器類型:
功率
電源電壓最大:
2.5V
電源電壓最小:
0.9V
???片標號:
4919
表面安裝器件:
表面安裝
負載阻抗, 最小:
8ohm
額定電源電壓, +:
3.6V

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