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EC4211 Datasheet(PDF) 3 Page - E-CMOS Corporation

Part # EC4211
Description  Constant Current Linear LED Driver
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Manufacturer  E-CMOS [E-CMOS Corporation]
Direct Link  http://www.ecmos.com.tw/
Logo E-CMOS - E-CMOS Corporation

EC4211 Datasheet(HTML) 3 Page - E-CMOS Corporation

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E-CMOS Corp. (www.ecmos.com.tw)
3D03N Rev. F003
EC4211
Constant Current Linear LED Driver
Page 3of 8
Control
Circuits
VIN
VLED
RGAIN
REXT
Protection
Circuits
FUNCTION DIAGRAM
PIN DESCRIPTIONS
TO252-5L Package
DFN-8L / SOP-8L Package
PIN
Symbol
Description
1
REXT
An external resistor between REXT and VLED pin sets different current regulation for LED strings.
2
NC
No internal mechanically connection. Leave this pin open.
3
VLED
The LED strings are connected from this pin to ground.
4
VIN
Input supply voltage.
5
RGAIN
Programmable thermal foldback protection for current regulation to limit die temperature during high power
operation or high ambient temperature conditions.
PIN
Symbol
Description
1
RGAIN
Programmable thermal foldback protection for current regulation to limit die temperature during high power
operation or high ambient temperature conditions.
2
VIN
Input supply voltage.
3
NC
No internal mechanically connection. Leave this pin open.
4
REXT
An external resistor between REXT and VLED pin sets different current regulation for LED strings.
5, 6, 7, 8
VLED
The LED strings are connected from these pins to ground.
Fig. 2 Detailed Block Diagram


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