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Guo-Fu Tseng
Works at Academia Sinica
Attended National Sun Yat-sen University
Lives in Taipei
133 followers|23,924 views
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Guo-Fu Tseng

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各位親戚家人朋友們~~ 我們要結婚囉!!

時間:五月三日(星期六)下午三點
地址:台北市中正區杭州南路一段15-1號4樓
   杭州南路與青島東路口
   醒吾大樓四樓 基督之家

詳情請參閱我們的網站:http://wedding.c7d.cc/
並請記得幫我們填寫一下簡單的表單喔: http://goo.gl/0U3aOo
國輔&思茜 婚禮
Sat, May 3, 3:00 PM GMT+8
醒吾大樓

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因為有改一些資訊,所以重新Share一次! :)
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Guo-Fu Tseng

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簡易Solder Mask!
印兩個光罩,一個是要蝕刻用的,一個是Solder Mask的反相。
蝕刻用光罩照光->清洗掉受光區域->蝕刻->Solder Mask光罩照光->清洗掉受光區域
這樣就完成了!看起來也比較有質感!
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最近看到的文件,介紹的很仔細!不錯不錯!

但是看完之後很囧,因為我都沒注意到原來Tantalum Capacitor的Recommanded operation voltage竟然是與Marked voltage差那麼的多,還有竟然受到溫度影響那麼大!這樣之前買的很多Tantalum capacitor都不太能用了,因為這種電容如果是過電壓損耗失效之後是會短路的!可能需要多加個有Fuse的設計。

Tantalum cacpacitor有兩個好處:體積小,ESR低。但是超級貴!
之後查資料才發現,竟然 Polymer capacitor (OS-CON / AO-CAPS / OC-CON / 固態有機半導體電容)雖然體積大一點點,但是ESR可以更低(可接受的Ripple Current也更高,隨便都有幾個Amp)、價格便宜很多、對於溫度的敏感度低非常多、工作忍受電壓也不會因為溫度有大幅度改變、失效時不會短度(甚是 有Self-recovery的特性)。

果然是繳學費,之後的Design可能會比較少用Tantalum Capacitor了。
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你那個6.3V差太多了,用在3.3V以內的電壓才合適。你的效率問題,是打算幾伏轉幾伏?輸出功率要多大?通常電容的損耗不會先考慮,會先看切換損失跟元件耗損。要先找有ZVS或ZCS功能的IC,挑低Rds的Power Mos。總功率低於50W就不要在意那3、5%的效率了,成本不符所需啦XD
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買了一些MPM01回來玩,這散熱條件感覺比LM2576好很多。
拿來當車用的USB電源應該不錯,不用加散射片可以3A輸出,又不用外加電感。
再配個TPS2511所需空間應該不大。
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http://www.chip1stop.com/
而且竟然給我24hour就到貨了.. Orz
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Hangout Ester Eggs
 
Hangouts Easter Eggs

Some of you may already figured out the hidden Easter Eggs in the new Hangouts.  Here is the full list to have some fun with them. Keep in mind that those codes only work with Hangouts on Google+ and the Chrome Extension. 
Not in video calls or mobile.

#io13   #googleplusupdate   #hangouts   #eastereggs  
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Guo-Fu Tseng

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各位親戚家人朋友們~~ 我們要結婚囉!!

時間:五月三日(星期六)下午三點
地址:台北市中正區杭州南路一段15-1號4樓
   杭州南路與青島東路口
   醒吾大樓四樓 基督之家

詳情請參閱我們的網站:http://wedding.c7d.cc/
並請記得幫我們填寫一下簡單的表單喔: http://goo.gl/dt3raQ
國輔&思茜 婚禮
Sat, May 3, 3:00 PM GMT+8
醒吾大樓

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恭喜!!
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果然是TI!!!!!
DC/DC 2.5-5.5V to 5V Boost converter
2.575mm * 2.925mm 包含Inductor!!!
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你都在注意這種奇奇怪怪的模組
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這幾天晚上的進度
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謝謝科科~~~
你嘴巴這麼甜,要不要我送你一張? :p
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http://www.semicon.sanken-ele.co.jp/ctrl/product/detail/MPM80/
睡前收到信看到這個新產品
SANKEN Electric TO220 Molded, DC/DC Converter MPM80
有沒有注意到?竟然連Output Inductor都包進去IC了呀!
然後又是Synchronized不需要flyback diode...
然後又是用MOSFET不是用BJT....
LM2576可以丟掉了... XD
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MPM01:3A版本,比較大顆,但是看圖3A Output散熱片幾乎不需要了。(我想要的應用啦)
http://www.semicon.sanken-ele.co.jp/ctrl/product/detail/MPM01/
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好多青蛙呀!!!!
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People
In his circles
115 people
Have him in circles
133 people
Jen-Hao Cheng's profile photo
李慧芝's profile photo
Ian Yang's profile photo
haven yin's profile photo
Pichu Baby's profile photo
邱子揚's profile photo
Chun-Hao Tseng's profile photo
Education
  • National Sun Yat-sen University
    CSE Bachelor, 2002 - 2007
  • National Sun Yat-sen University
    CSE Master, 2007 - 2009
Basic Information
Gender
Male
Other names
曾國輔, CD
Work
Occupation
Research Assistant
Employment
  • Academia Sinica
    Research Assistant, 2011 - present
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Taipei
Previously
Taipei - Taichung - Kaohsiung
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