Datasheet > LM4919

LM4919

更新时间： 2024-09-22 23:16:47

品牌	Logo	应用领域
美国国家半导体 - NSC		音频放大器
页数	文件大小	规格书
15页	565K
描述
1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier

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LM4919 数据手册

May 2004

LM4919

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

Audio Amplifier

General Description

Key Specifications

n Mono-BTL output power

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 8Ω load at 1% THD+N. In

Single Ended stereo headphone mode, the amplifier delivers

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

(R_L= 8Ω, V_DD= 1.5V, THD+N = 1%)

n Stereo Headphone output power

(R_L= 16Ω, V_DD= 1.5V, THD+N = 1%)

85mW (typ)

14mW (typ)

0.02µA (typ)

n Micropower shutdown current

n Supply voltage operating range

n PSRR 1kHz, V_DD= 1.5V, R_L= 16Ω

0.9V V_DD2.5V

72dB (typ)

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.

Features

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.

n Single-cell 0.9V to 2.5V battery operation

n BTL mode for mono speaker

n Single ended headphone operation with coupling

capacitors

n Unity-gain stable

n "Click and pop" suppression circuitry

n Active low micropower shutdown

n Low current, active-low mute mode

n Thermal shutdown protection circuitry

Applications

n Portable one-cell audio products

n Portable one-cell electronic devices

Typical Application

20082101

FIGURE 1. Block Diagram

Boomer^®is a registered trademark of National Semiconductor Corporation.

DS200821

www.national.com

12 3 4 5 6 7...15

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与LM4919相关器件

型号	品牌	获取价格	描述	数据表
LM4919MM	NSC	获取价格	1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier
LM4919MMX/NOPB	TI	获取价格	IC,AUDIO AMPLIFIER,SINGLE,TSSOP,10PIN,PLASTIC
LM4920	NSC	获取价格	Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW Stereo Headphone Amplifier
LM49200	NSC	获取价格	Stereo Class AB Audio Subsystem with a True Ground Headphone Amplifier
LM49200TL	NSC	获取价格	Stereo Class AB Audio Subsystem with a True Ground Headphone Amplifier
LM49200TLX	NSC	获取价格	Stereo Class AB Audio Subsystem with a True Ground Headphone Amplifier
LM4920TL	NSC	获取价格	IC 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, BGA14, MICRO, BGA-14, Audio/Video Amplifier
LM4920TLX	NSC	获取价格	IC 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, BGA14, MICRO, BGA-14, Audio/Video Amplifier
LM4921	NSC	获取价格	Low Voltage I2S 16-Bit Stereo DAC with Stereo Headphone Power Amplifiers and Volume Contro
LM4921ITL	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PBGA20, MICRO, SMD-20