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EC4220 Datasheet(PDF) 3 Page - E-CMOS Corporation

Part # EC4220
Description  High power factor linear constant current LED driver (Preliminary Version)
PDF  5 Pages
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Manufacturer  E-CMOS [E-CMOS Corporation]
Direct Link  http://www.ecmos.com.tw/
Logo E-CMOS - E-CMOS Corporation

EC4220 Datasheet(HTML) 3 Page - E-CMOS Corporation

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EC4220
High power factor linear constant current LED driver
(Preliminary Version)
E-CMOS Corp. (www.ecmos.com.tw)
Page 3 of 5
5D10N Rev. F001
Function Block
電流設置
電流設置
電流設置
電流設置
晶片 D1 埠輸入電壓最低為 6V（IOUT =20mA），可通過外接 REXT 電阻實現輸出電流 10mA～60mA，內置的
LED 恒流驅動模組可使LED 電流保持高精度且不受環境溫度影響。晶片可通過逐級開啟 4 個開關實現高效率，
高功率因數。
晶片輸出電流通過REXT電阻進行調節，IOUT=VREXT/R，4 級開關逐級開啟時輸出電流如下：
ID1=0.55V/R
ID2=0.70V/R
ID3=0.85V/R
ID4=0.90V/R
Typical Application Circuit
( 典型應用電路)
Power
OTP
Analog logic
&
Current control
GND
R
700V
MOS
700V
MOS
700V
MOS
700V
MOS
D1
D2
D3
D4
EC4220



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