LM3886 LM4780 TDA2030A LM675T LM4766的硅片显微图

k2r · 发表于 2009-11-29 22:25

4766是两颗2876？2876还没见过……

hzyjq · 发表于 2009-11-29 22:46

国半是有LM2876 只不过用的人少
LM2876 High-Performance 40 Watt Audio Power Amplifier w/Mute
Features ? 40W continuous average output power into 8 欧
75W instantaneous peak output power capability
Signal-to-Noise Ratio >= 95 dB(min)
An input mute function
Output protection from a short to ground or to the supplies via internal current limiting circuitry
Output over-voltage protection against transients from inductive loads
Supply under-voltage protection, not allowing internal biasing to occur when |VEE| + |VCC| <= 12V, thus eliminating turn-on and turn-off transients
11-lead TO-220 package
Wide supply range 20V - 72V

Description
The LM2876 is a high-performance audio power amplifier capable of delivering 40W of continuous average power to an 8 load with 0.1% THD+N from 20Hz-20kHz.
The performance of the LM2876, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe?) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks.
The LM2876 maintains an excellent signal-to-noise ratio of greater than 95dB (min) with a typical low noise floor of 2.0μV. It exhibits extremely low THD+N values of 0.06% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%.

k2r · 发表于 2009-11-29 23:51

放大镜倒是好搞，就是IC拆封比较难，据说有用激光一层一层雕的，还用用酸性溶液分解的……

zqy797 · 发表于 2009-11-29 23:58

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3069 · 发表于 2009-12-12 18:13

这个真的学习了

chenyh98 · 发表于 2009-12-20 20:08

爽啊,什么都看得好清楚了
LZ可以用这个来DIY IC了

Rundstedt · 发表于 2009-12-20 20:23

精神可嘉。。。。。。。。

DAWEIZLW · 发表于 2009-12-20 21:01

楼主多杀点啊！

etodo · 发表于 2009-12-20 21:24

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minhai103 · 发表于 2009-12-20 21:36

dou都看得到3三极管？哪个是？那些是连线？强人啊

minhai103 · 发表于 2009-12-20 21:38

还有，哪些是电阻，哪些是电容？高手指点一下

fuymm · 发表于 2009-12-20 21:43

迷宫啊，感谢分享！

yy520yy · 发表于 2009-12-20 22:27

谢谢LZ破费了那么多片子给大家看。

qwea222 · 发表于 2009-12-20 22:57

很强大在弄几个山寨版的和原版的对照下让我们涨涨见识

筑明 · 发表于 2009-12-20 23:12

想知道LM1876里面是哪两个芯片做的，原来一说是LM1875，但是看国半提供的参数相差很大。

音乐独衷 · 发表于 2009-12-20 23:23

下次购买的时候也带个显微镜与手术刀去~`就不会买到假的了

铁锤 · 发表于 2009-12-21 00:12

多杀点啊

nopa · 发表于 2009-12-21 10:32

楼主真强！谢谢！
有空杀个LM1876看看是不是两个1875装在一个里面的

simon_zsw · 发表于 2009-12-21 10:48

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feimin002 · 发表于 2009-12-21 10:55

想请教一下楼主如何解剖？我有ic断脚了。想给他续骨，让他继续服役，无奈手工不行，只能作罢

[DIY制作] LM3886 LM4780 TDA2030A LM675T LM4766的硅片显微图

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