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| 型号： | LM4891MM/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 1/21页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 1W MONO 8MSOP |
| 标准包装： | 1 |
| 系列： | Boomer® |
| 类型： | AB 类 |
| 输出类型： | 1-通道（单声道） |
| 在某负载时最大输出功率 x 通道数量： | 1W x 1 @ 8 欧姆 |
| 电源电压： | 2.2 V ~ 5.5 V |
| 特点： | 消除爆音，关机，热保护 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 8-MSOP |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 剪切带 (CT) |
| 其它名称： | *LM4891MM *LM4891MM/NOPB LM4891MMCT |
OBSOLETE
SNAS122E – MAY 2001 – REVISED APRIL 2013
LM4891 Boomer Audio Power Amplifier Series 1 Watt Audio Power Amplifier
Check for Samples: LM4891
1
FEATURES
DESCRIPTION
The LM4891 is an audio power amplifier primarily
23
Available in Space-Saving Packages: Micro
designed
for
demanding
applications
in
mobile
SMD, VSSOP, SOIC, and WSON
phones and other portable communication device
Ultra Low Current Shutdown Mode
applications. It is capable of delivering 1 watt of
BTL Output Can Drive Capacitive Loads
continuous average power to an 8
BTL load with
less than 1% distortion (THD+N) from a 5VDC power
Improved Pop and Click Circuitry Eliminates
supply.
Noises During Turn-On and Turn-Off
Transitions
Boomer audio power amplifiers were designed
specifically to provide high quality output power with a
2.2 to 5.5V Operation
minimal
amount
of
external
components.
The
No Output Coupling Capacitors, Snubber
LM4891 does not require output coupling capacitors
Networks or Bootstrap Capacitors Required
or bootstrap capacitors, and therefore is ideally suited
Thermal Shutdown Protection
for mobile phone and other low voltage applications
where minimal power consumption is a primary
Unity-Gain Stable
requirement.
External Gain Configuration Capability
The LM4891 features a low-power consumption
shutdown mode, which is achieved by driving the
APPLICATIONS
shutdown
pin
with
logic
high.
Additionally,
the
Mobile Phones
LM4891
features
an
internal
thermal
shutdown
PDAs
protection mechanism.
Portable Electronic Devices
The LM4891 contains advanced pop & click circuitry
which eliminates noises which would otherwise occur
KEY SPECIFICATIONS
during turn-on and turn-off transitions.
PSRR at 217Hz, VDD = 5V, 8 Load: 62dB (typ)
The
LM4891
is
unity-gain
stable
and
can
be
configured by external gain-setting resistors.
Power Output at 5.0V & 1% THD: 1.0W (typ)
Power Output at 3.3V & 1% THD: 400mW (typ)
Shutdown Current: 0.1
μA (typ)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
Boomer is a registered trademark of Texas Instruments.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright 2001–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4891MX/NOPB | 功能描述:IC AMP AUDIO PWR 1W MONO 8SOIC RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4892 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:1 Watt Audio Power Amplifier with Headphone Sense |
| LM48920B WAF | 制造商:Texas Instruments 功能描述: |
| LM4892B E WAF | 制造商:Texas Instruments 功能描述: |
| LM4892BUPN E WAF | 制造商:Texas Instruments 功能描述: |
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