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SM8207 Scheda tecnica(PDF) 2 Page - SamHop Microelectronics Corp.

Il numero della parte SM8207
Spiegazioni elettronici  SM8207???窈녽솉鶯볟엹若싮쎔役곭쉪LED要끻땿IC,??뇡?
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Produttore elettronici  SAMHOP [SamHop Microelectronics Corp.]
Homepage  http://www.samhop.com.tw
Logo SAMHOP - SamHop Microelectronics Corp.

SM8207 Scheda tecnica(HTML) 2 Page - SamHop Microelectronics Corp.

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SM8207
1
2
3
6
7
8
ZCD
GND
VIN
CS
GATE
VCC
SOP-8 (正視)
1
ZCD
2
3
4
6
VCC
並接一個4.7uF以上, Low-ESR陶瓷電容到IC的參考地. 它僅做供給
IC內部偏壓之用,外部不可使其短路或施加任何負載.
7
透過一個外部電阻去檢測電感電流,當零電流檢測迴路檢測到電感的電
流已經到達零電流時(電感被消磁),控制器會送出一個讓Power MOSFET再導通的信號,重
新啟動MOSFET.
8
GATE
CS
放一個電阻介於Power MOSFET源極端與電感器之間去檢測電感器峰值電
流,進而達到平均電流控制目的.
輸出電流去驅動一個外部的N型Power MOSFET. 串聯一只電阻到MOSFET
的閘極來限制啟動峰值電流並穫得較佳的EMI. 當輸入低於UVLO閂鎖電壓時此信號被維持
在低準位.
COMP
VIN
5
預留做其他功能目前無任何定義.
Part Number
Marking
SM8207SL
△xxxxxx
SM8207SL
Packing Method
Tape & reel
2
www.samhop.com.tw
Rev. 1.1 @ 2013/03
GND
線路所有的迴路皆以此做為參考點, 應儘量靠近而且線距要最短.
Note: The letter “S” is marked for SOP package, and letter “L” is marked
for Lead free parts.
4
5
COMP
N.C
此腳位尚有針對輸入過高壓保護的功用.
N.C
[備註說明]: IC參考地 GND Pin)與市電或橋式整流器的地是不同,萬萬不可將其接在一起,否則會燒燬晶片.
從此端放一個電容到地作為控制補償之用以穩定迴路操作.


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