音响ic、功放ic、atj2009b、功放芯片

2x2.5w 音响功放芯片支持立体声耳机

♣欢迎→点击←atj2009b低功耗便携音响芯片。

关于芯片介绍：

lm4863  dual 2.2w audio amplifier plus stereo headphone
function  general description
the lm4863 is a dual bridge-connected audio power amplifier
which, when connected to a 5v supply, will deliver 2.2w
to a 4ω load (note 1) or 2.5w to a 3ω load (note 2) with less
than 1.0% thd+n. in addition, the headphone input pin
allows the amplifiers to operate in single-ended mode when
driving stereo headphones.
boomer audio power amplifiers were designed specifically to
provide high quality output power from a surface mount
package while requiring few external components. to simplify
audio system design, the lm4863 combines dual bridge
speaker amplifiers and stereo headphone amplifiers on one
chip.
the lm4863 features an externally controlled, low-power
consumption shutdown mode, a stereo headphone amplifier
mode, and thermal shutdown protection. it also utilizes circuitry
to reduce “clicks and pops” during device turn-on.
note 1: an lm4863mte or lm4863lq that has been properly mounted to
a circuit board will deliver 2.2w into 4ω. the other package options for the
lm4863 will deliver 1.1w into 8ω. see the application information sections
for further information concerning the lm4863mte and lm4863lq.
note 2: an lm4863mte or lm4863lq that has been properly mounted to a
circuit board and forced-air cooled will deliver 2.5w into 3ω.
key specifications
1. po at 1% thd+n
2. lm4863lq, 3ω, 4ω loads 2.5w(typ), 2.2w(typ)
3. lm4863mte, 3ω, 4ω loads 2.5w(typ), 2.2w(typ)
4.lm4863mte, 8ω load 1.1w(typ)
5.lm4863, 8ω 1.1w(typ)
6. single-ended mode thd+n at 75mw into
32ω 0.5%(max)
7. shutdown current 0.7μa(typ)
8. supply voltage range 2.0v to 5.5v
features
9. stereo headphone amplifier mode
10.“click and pop” suppression circuitry
11. unity-gain stable
12. thermal shutdown protection circuitry
13. soic, tssop, exposed-dap tssop, and llp
packages
* not recommended for new designs. contact nsc audio
marketing.
applications
14. multimedia monitors
15. portable and desktop computers
16. portable televisions

概述
lm4863是一个双桥式音频功放ic。在5v工作电压下，负载（4ω）上的平均功率为2.2w或负载（3ω）
上的平均功率为2.5w，且失真度不超过1.0％。另外，在运行立体耳机模式时，耳机输入端口允许放大器
工作在单端模式下。
lm4863是专为大功率、高保真的应用场合所设计的音频功放ic。所需外围元件少且在2.0v～5.5v的
输入电压下均可工作。
功能特点
1. 立体耳机功放模式
2. 稳定的增益输出
3.热关断保护电路

芯片sop16  & dip16封装规格：点击首页左边“功放ic技术资料网”下载芯片封装和demo  板的pcb文档、原理图。