EC4211 E-CMOS | Alldatasheet

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Technical content

EC4211Constant Current Linear LED Driver Page 1of 8 RGAIN (Optional) 120Vac 60Hz Current Set Point VLED(total)=120V ILED<60mA REXT

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

APPLICATIONS

  • LED Driver
  • Lighting Applications
  • Lamp Indicators
  • Candle Light
  • Low Cost solution
  • Constant Current Source 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 highe r 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. TYPICAL APPLICATION CIRCUIT Fig. 1 Simplified Application Circuit

EC4211Constant Current Linear LED Driver Page 2of 8 (SOP-8L)4 RGAIN VLED VLED VLED VLED VIN REXT NC Thermal PAD RGAIN VIN 13 2 (TO252-5L) REXT NC VLED Thermal PAD DFN-8L REXT VIN NC Thermal PAD 4 5

8 VLED

Operating Temperature……… ………… -40°C to +125°C Storage Temperature…………………… -55°C to +150°C PIN CONFIGURATION Note: Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Conti nuous operation of the device at the absolute rating level may affect device reliability.

Ordering Information

Part No. Package Type Marking Information Remark EC4211NNMHR SOP-8L EC4211 YYWW LLLLLT YYWW ：Date Code LLLLL：Lot No T：internal tracking code EC4211NNF2R DFN-8L EC4211 LLLLL YYWWT EC4211NNA5R TO252-5L EC4211 YYWW LLLLLT

ELECTRICAL CHARACTERISTICS

TA = 25°C unless otherwise specified PARAMETER CONDITIONS MIN TYP MAX UNIT Electrical Characteristic VIN Operation Voltage 15 265 V ILED Current Regulation (Note 1) VIN=120Vdc, REXT=15Ω, VLED=100V 38.16 40.17 42.18 mA VIN=220Vdc, REXT=30Ω, VLED=200V 19.16 20.17 21.18 mA ILED(MAX) Maximum Current Regulation VDROP≦16V (Note 2) 60 mA IQ Quiescent Current V IN=20Vdc, REXT=Open 170 µA VREF Reference Voltage (Note 3) 0.6 V VDROP(MAX) Maximum Dropout Voltage (Note 4) VIN= 265Vac, REXT=30Ω, VLED=220V 170 V Thermal Characteristic △VREF(T) VREF Temperature Coefficient T A=-40°C ~125°C 0.01 ％/℃ TA Operating Temperature -40 125 ℃ PD Total Power Dissipation (Operation) 1 W RΘJA Thermal Resistance Protection OCP Over Current Protection 150 mA OTP Over Temperature Protection 150 ℃ TFP Thermal Foldback Protection (Note 5) 90 ℃ Note: 1. ILED=0.6/REXT+IQ 2. VDROP=VIN－VLED－0.6, PD＜1W (No heat sink) 3. VREF=V(REXT)－VLED 4. The current regulation is for a instantaneous AC line input current only, not to exceed thermal characteristics of package. 5. ILED(TFP)=ILED－V(RGAIN)/RGAIN

EC4211Constant Current Linear LED Driver Page 3of 8 Control Circuits VIN VLED RGAIN REXTProtection Circuits FUNCTION DIAGRAM PIN DESCRIPTIONS DFN-8L / SOP-8L Package PIN Symbol Description 1 R EXT An external resistor between R EXT and VLED pin sets different current regulation for LED strings. 2 NC No internal mechanically connection. Leave this pin open. 3 V LED The LED strings are connected from this pin to ground. 4 V IN Input supply voltage. 5 R GAIN Programmable thermal foldback pr otection for current regulation to limit die temperature during high power operation or high ambient temperature conditions. PIN Symbol Description 1 R GAIN Programmable thermal foldback pr otection for current regulation to limit die temperature during high power operation or high ambient temperature conditions. 2 V IN Input supply voltage. 3 NC No internal mechanically connection. Leave this pin open. 4 R EXT An external resistor between REXT and VLED pin sets different current regulation for LED strings. 5, 6, 7, 8 V LED The LED strings are connected from these pins to ground. Fig. 2 Detailed Block Diagram

EC4211Constant Current Linear LED Driver Page 4of 8 18.5 19.5 20.5 21.5 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (℃) OUTPUT CURRENT (mA) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 1 02 03 04 05 06 0 INPUT VOLTAGE (V) VREF (V) 100 120 140 160 180 200 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (℃) QUIESCENT CURRENT (uA) 0 15 30 45 60 75 90 105 120 135 TEMPERATURE (℃) OUTPUT CURRENT (mA) 100 0 1 02 03 04 05 06 07 08 0 OUTPUT CURRENT (mA) REXT(Ω) 0.590 0.595 0.600 0.605 0.610 0.615 0.620 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (℃) VREF (V) ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise specified) VREF vs. TEMPERATURE OUTPUT CURRENT vs. TEMPERATURE VIN=16.5Vdc REXT=30 RGAIN=Open OUTPUT CURRENT vs. REXT VREF vs. INPUT VOLTAGE THERMAL FOLDBACK vs. TEMPERATURE QUIESCENT CURRENT vs. TEMPERATURE RGAIN=10k REXT=30 RGAIN=Open VIN=16.5Vdc REXT=30 RGAIN=Open VIN=16.5Vdc RGAIN=Open RGAIN=20k VIN=16.5Vdc REXT=Open RGAIN=Open VIN=16.5Vdc REXT=30

EC4211Constant Current Linear LED Driver Page 5of 8 ELECTRICAL CHARACTERISTICS (Continuted) TRANSIENT RESPONSE TRANSIENT RESPONSE OVER CURRENT PROTECTION TRANSIENT RESPONSE vs. THERMAL FOLDBACK VIN=120Vac REXT=10 RGAIN=Open VIN=220Vac REXT=24 RGAIN=Open VIN=130Vac REXT=8.2 RGAIN=15k VIN=60Vdc REXT=Short RGAIN=Open OVER TEMPERATURE PROTECTION VIN=130Vac REXT=Short RGAIN=Open

EC4211Constant Current Linear LED Driver Page 6of 8 BR1 AC Current Set Point VLED ILED TO252-5REXT RGAIN (Optional) RV1 LED Lighting EC4211 Application Circuit Schematic 110VAC 4W LED Lighting Demo Board Part List COMPONENT VALUE PACKAGE U1 EC4211 TO252-5L BR1 B10S SMD F1 1A DIP RV1 221KD14 (140VAC) DIP D1 1N4003 DIP REXT 8.5 0603 RGAIN 7.5k 0603 VLED 120V NA 220VAC 4W LED Lighting Demo Board Part List COMPONENT VALUE PACKAGE U1 EC4211 TO252-5L BR1 B10S SMD F1 1A DIP RV1 431KD14 (275VAC) DIP D1 1N4003 DIP REXT 24 0603 RGAIN 7.5k 0603 VLED 240V NA Note: 1. RV1 is for Surge Protection. 2. D1 is for Hi-POT protection. Fig. 3 Typical Application Circuit

EC4211Constant Current Linear LED Driver Page 7of 8 OUTLINE DIMENSIONS (Dimensions shown in millimeters)

EC4211Constant Current Linear LED Driver Page 8of 8