Datasheet > LM4920TL

LM4920TL

更新时间： 2024-01-19 19:17:18

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器商用集成电路
页数	文件大小	规格书
17页	1228K
描述
IC 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, BGA14, MICRO, BGA-14, Audio/Video Amplifier

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LM4920TL 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	BGA	包装说明：	VFBGA,
针数：	14	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.33.00.01
风险等级：	5.51	标称带宽：	22 kHz
商用集成电路类型：	AUDIO AMPLIFIER	JESD-30 代码：	S-XBGA-B14
JESD-609代码：	e1	长度：	1.97 mm
湿度敏感等级：	1	信道数量：	2
功能数量：	1	端子数量：	14
最高工作温度：	85 °C	最低工作温度：	-40 °C
标称输出功率：	0.08 W	封装主体材料：	UNSPECIFIED
封装代码：	VFBGA	封装形状：	SQUARE
封装形式：	GRID ARRAY, VERY THIN PROFILE, FINE PITCH	认证状态：	Not Qualified
座面最大高度：	0.675 mm	最大供电电压 (Vsup)：	4.2 V
最小供电电压 (Vsup)：	1.6 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Tin/Silver/Copper (Sn/Ag/Cu)
端子形式：	BALL	端子节距：	0.5 mm
端子位置：	BOTTOM	宽度：	1.97 mm
Base Number Matches：	1

LM4920TL 数据手册

October 2006

LM4920

Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW

Stereo Headphone Amplifier

General Description

Key Specifications

The LM4920 is a ground referenced, fixed-gain audio power

amplifier capable of delivering 80mW of continuous average

power into a 16Ω single-ended load with less than 1%

THD+N from a 3V power supply.

Improved PSRR at 217Hz

Power Output at V_DD= 3V,

R_L= 16Ω, THD % 1%

Shutdown Current

70dB (typ)

80mW (typ)

0.01µA (typ)

1.5V/V (typ)

1.6V to 4.2V

The LM4920 features a new circuit technology that utilizes a

charge pump to generate a negative reference voltage. This

allows the outputs to be biased about ground, thereby elimi-

nating output-coupling capacitors typically used with normal

single-ended loads.

Internal Fixed Gain

Operating Voltage

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4920 does not require output

coupling capacitors or bootstrap capacitors, and therefore is

ideally suited for mobile phone and other low voltage appli-

cations where minimal power consumption is a primary re-

quirement.

Features

n Fixed Logic Levels

n Ground referenced outputs

n High PSRR

n Available in space-saving micro SMD package

n Ultra low current shutdown mode

n Improved pop & click circuitry eliminates noises during

turn-on and turn-off transitions

n No output coupling capacitors, snubber networks,

bootstrap capacitors, or gain-setting resistors required

n Shutdown either channel independently

The LM4920 features a low-power consumption shutdown

mode selectable for either channel separately. This is ac-

complished by driving either the SD_RC (Shutdown Right

Channel) or SD_LC (Shutdown Left Channel) (or both) pins

with logic low, depending on which channel is desired shut-

down. Additionally, the LM4920 features an internal thermal

shutdown protection mechanism.

Applications

n Mobile Phones

n MP3 Players

n PDAs

n Portable electronic devices

n Notebook PCs

The LM4920 contains advanced pop & click circuitry that

eliminates noises which would otherwise occur during

turn-on and turn-off transitions.

The LM4920 has an internal fixed gain of 1.5V/V.

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

DS201793

www.national.com

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