EC4211 Datasheet, PDF (1/8 Pages) E-CMOS Corporation – Constant Current Linear LED Driver

Constant Current Linear LED Driver
EC4211
FEATURES
• Constant LED Current for Varying Input Voltage
• Adjusted Current Operation
• Low Quiescent Current
• Simplifies Circuit and System Designs
• Compact Component Count
• Provided Higher Current by Parallel
• Temperature Compensated Constant Current
• Over Current Protection
• Over Temperature Protection
• LED Current Programmable Thermal Foldback
for thermal Protection
• SOP-8L Package or DFN-8L Package or
TO252-5L Package
APPLICATIONS
• LED Driver
• Lighting Applications
• Lamp Indicators
• Candle Light
• Low Cost solution
• Constant Current Source
TYPICAL APPLICATION CIRCUIT
GENERAL DESCRIPTION
The EC4211 is a constant current linear LED driver
for replace discrete solutions in AC/DC power
application (up to 265V). The device is to drive a
constant current of ±5% variation by an external
resistor for different LED strings. The solution
eliminates the need of individual components by
combining them into a single package, which
results in a significant reduction of both system cost
and board space. For higher current application,
multiple EC4211s can also be used in parallel such
as 40mA, 80mA or 160mA. The EC4211 is self-
protected against over temperature and over
current. Internal thermal foldback function regulates
LED driver current automatically to limit die
temperature during high power operation or high
ambient temperature conditions. These features
provide maximum system protection for the
demanding lighting applications. The EC4211 is
available in a space saving SOP-8L package,
DFN-8L package or TO252-5L package, and the
operating temperature is from –40°C to +125°C.
120Vac
60Hz
R_EXT
Current
Set Point
R_GAIN (Optional)
I_LED<60mA
＋
V_LED(total)=120V
－
Fig. 1 Simplified Application Circuit
E-CMOS Corp. (www.ecmos.com.tw)
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3D03N Rev. F003