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參數資料
| 型號： | LM4892 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1 Watt Audio Power Amplifier with Headphone Sense |
| 中文描述： | 1瓦音頻功率放大器意識與耳機 |
| 文件頁數： | 1/22頁 |
| 文件大小： | 1037K |
| 代理商： | LM4892 |
LM4892
1 Watt Audio Power Amplifier with Headphone Sense
General Description
The LM4892 is an audio power amplifier primarily designed
for demanding applications in mobile phones and other por-
table communication device applications. It is capable of
delivering 1 watt of continuous average power to an 8
BTL
load with less than 1% distortion (THD+N) from a 5V
power supply. Switching between bridged speaker mode and
headphone (single-ended) mode is accomplished using the
headphone sense pin.
Boomer audio power amplifiers are designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4892 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.
The LM4892 features a low-power consumption shutdown
mode, which is achieved by driving the shutdown pin with
logic low. Additionally, the LM4892 features an internal ther-
mal shutdown protection mechanism.
The LM4892 contains advanced pop & click circuitry which
eliminates noise which would otherwise occur during turn-on
and turn-off transitions.
The LM4892 is unity-gain stable and can be configured by
external gain-setting resistors.
Key Specifications
j
PSRR at 217Hz, V
DD
= 5V, 8
Load
j
Power Output at 5.0V & 1% THD
j
Power Output at 3.3V & 1% THD
j
Shutdown Current
62dB (typ)
1.0W (typ)
400mW (typ)
0.1μA (typ)
Features
n
Available in space-saving packages: LLP, micro SMD,
MSOP, and SOIC
n
Ultra low current shutdown mode
n
BTL output can drive capacitive loads up to 500pF
n
Improved pop & click circuitry eliminates noise during
turn-on and turn-off transitions
n
2.2 - 5.5V operation
n
No output coupling capacitors, snubber networks or
bootstrap capacitors required
n
Thermal shutdown protection
n
Unity-gain stable
n
External gain configuration capability
n
Headphone amplifier mode
Applications
n
Mobile Phones
n
PDAs
n
Portable electronic devices
Typical Application
Boomer
is a registered trademark of National Semiconductor Corporation.
20012701
FIGURE 1. Typical Audio Amplifier Application Circuit (Pin #’s apply to M & MM packages)
October 2002
L
2002 National Semiconductor Corporation
DS200127
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4892IBP | 1 Watt Audio Power Amplifier with Headphone Sense |
| LM4892IBPX | 1 Watt Audio Power Amplifier with Headphone Sense |
| LM4894MM | 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select |
| LM4894 | 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select |
| LM4894IBP | 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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: |
| LM4892IBP | 功能描述:IC AMP AUDIO PWR 1W MONO 8USMD RoHS:否 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4892IBPX | 制造商:Rochester Electronics LLC 功能描述:1W AUDIO AMP WITH HEADPHONE SE - Bulk |
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