Constant Current Linear LED Driver EC4211 FEATURES GENERAL DESCRIPTION • Constant LED Current for Varying Input Voltage 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 selfprotected 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. • 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 Current Set Point RGAIN (Optional) REXT 120Vac 60Hz ＋ ILED<60mA VLED(total)=120V － Fig. 1 Simplified Application Circuit E-CMOS Corp. (www.ecmos.com.tw) 3D03N Rev. F003 Page 1of 8 Constant Current Linear LED Driver EC4211 PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS VIN Supply Voltage................................................... 500V REXT, RGAIN Operation Voltages…................................ 6V Operating Temperature………………… -40°C to +125°C Storage Temperature…………………… -55°C to +150°C Maximum Die Temperature………………………. +150°C Lead Temperature……………………………….… +260°C ESD HBM Voltage……………………………....…… 2.5kV ESD MM Voltage……………………………………… 300V 3 RGAIN 1 VIN 2 NC 3 REXT 4 8 VLED RGAIN 1 Thermal PAD (SOP-8L) 7 VLED VIN 2 6 VLED NC 3 5 VLED REXT 4 8 VLED Thermal PAD DFN-8L Thermal PAD 7 VLED (TO252-5L) 6 VLED 5 VLED 1 2 3 4 5 REXT NC VLED VIN RGAIN Note: Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect device reliability. Ordering Information Part No. Package Type Marking Information EC4211NNMHR SOP-8L EC4211 YYWW LLLLLT EC4211NNF2R DFN-8L EC4211 LLLLL YYWWT EC4211NNA5R TO252-5L EC4211 YYWW LLLLLT Remark YYWW ：Date Code LLLLL：Lot No T：internal tracking code ELECTRICAL CHARACTERISTICS TA = 25°C unless otherwise specified PARAMETER Electrical Characteristic VIN CONDITIONS Operation Voltage ILED Current Regulation (Note 1) ILED(MAX) Maximum Current Regulation IQ VREF VDROP(MAX) Quiescent Current Reference Voltage (Note 3) Maximum Dropout Voltage (Note 4) VIN=120Vdc, REXT=15Ω, VLED=100V VIN=220Vdc, REXT=30Ω, VLED=200V VDROP≦16V (Note 2) VIN=20Vdc, REXT=Open MIN TYP MAX UNIT 15 38.16 19.16 40.17 20.17 265 42.18 21.18 60 V mA mA mA 170 µA V V 170 0.6 VIN= 265Vac, REXT=30Ω, VLED=220V Thermal Characteristic △VREF(T) TA PD VREF Temperature Coefficient RΘJA Thermal Resistance TA=-40°C ~125°C Operating Temperature Total Power Dissipation (Operation) 0.01 -40 SOP-8L Package DFN-8L Package TO252-5L Package 125 1 75 33.2 68 Protection OCP Over Current Protection 150 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 E-CMOS Corp. (www.ecmos.com.tw) ％/℃ ℃ W ℃/W ℃/W ℃/W mA ℃ ℃ 3D03N Rev. F003 Page 2of 8 Constant Current Linear LED Driver EC4211 FUNCTION DIAGRAM VIN RGAIN Control Circuits Protection Circuits REXT VLED Fig. 2 Detailed Block Diagram PIN DESCRIPTIONS TO252-5L Package PIN 1 2 3 4 5 Symbol REXT NC VLED VIN RGAIN Description An external resistor between REXT and VLED pin sets different current regulation for LED strings. No internal mechanically connection. Leave this pin open. The LED strings are connected from this pin to ground. Input supply voltage. Programmable thermal foldback protection for current regulation to limit die temperature during high power operation or high ambient temperature conditions. DFN-8L / SOP-8L Package PIN 1 2 3 4 5, 6, 7, 8 Symbol RGAIN VIN NC REXT VLED Description Programmable thermal foldback protection for current regulation to limit die temperature during high power operation or high ambient temperature conditions. Input supply voltage. No internal mechanically connection. Leave this pin open. An external resistor between REXT and VLED pin sets different current regulation for LED strings. The LED strings are connected from these pins to ground. E-CMOS Corp. (www.ecmos.com.tw) 3D03N Rev. F003 Page 3of 8 EC4211 Constant Current Linear LED Driver ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise specified) VREF vs. TEMPERATURE 0.620 22 VIN=16.5Vdc REXT=30 RGAIN=Open 21.5 0.615 OUTPUT CURRENT (mA) VIN=16.5Vdc REXT=30 RGAIN=Open 0.610 0.605 0.600 0.595 21 20.5 20 19.5 19 18.5 0.590 -40 -25 -10 5 20 35 50 65 80 95 -40 110 125 -25 -10 5 VREF vs. INPUT VOLTAGE 0.7 20 35 50 65 80 95 110 125 TEMPERATURE (℃ ) TEMPERATURE (℃ ) OUTPUT CURRENT vs. REXT 100 90 0.6 80 0.5 70 REXT=30 RGAIN=Open 0.4 REXT(Ω) VREF (V) 0.3 VIN=16.5Vdc RGAIN=Open 60 50 40 30 0.2 20 0.1 10 0 0 0 10 20 30 40 INPUT VOLTAGE (V) 50 0 60 VIN=16.5Vdc REXT=30 20 30 40 50 60 70 80 QUIESCENT CURRENT vs. TEMPERATURE 200 RGAIN=20k 180 QUIESCENT CURRENT (uA) 20 15 RGAIN=10k 10 10 OUTPUT CURRENT (mA) THERMAL FOLDBACK vs. TEMPERATURE 25 OUTPUT CURRENT (mA) VREF (V) OUTPUT CURRENT vs. TEMPERATURE 5 VIN=16.5Vdc REXT=Open RGAIN=Open 160 140 120 100 80 0 0 15 30 45 60 75 90 105 120 135 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (℃ ) TEMPERATURE (℃ ) E-CMOS Corp. (www.ecmos.com.tw) 3D03N Rev. F003 Page 4of 8 EC4211 Constant Current Linear LED Driver ELECTRICAL CHARACTERISTICS (Continuted) TRANSIENT RESPONSE TRANSIENT RESPONSE VIN=220Vac REXT=24 RGAIN=Open VIN=120Vac REXT=10 RGAIN=Open TRANSIENT RESPONSE vs. THERMAL FOLDBACK OVER CURRENT PROTECTION VIN=130Vac REXT=8.2 RGAIN=15k VIN=60Vdc REXT=Short RGAIN=Open OVER TEMPERATURE PROTECTION VIN=130Vac REXT=Short RGAIN=Open E-CMOS Corp. (www.ecmos.com.tw) 3D03N Rev. F003 Page 5of 8 EC4211 Constant Current Linear LED Driver LED Lighting EC4211 Application Circuit Schematic 4 5 F1 AC D1 1 Current Set Point REXT RV1 RGAIN (Optional) TO252-5 BR1 3 ＋ VLED ILED － Fig. 3 Typical Application Circuit 110VAC 4W LED Lighting Demo Board Part List COMPONENT VALUE PACKAGE U1 BR1 F1 RV1 D1 REXT RGAIN VLED EC4211 B10S 1A 221KD14 (140VAC) 1N4003 8.5 7.5k 120V TO252-5L SMD DIP DIP DIP 0603 0603 NA 220VAC 4W LED Lighting Demo Board Part List COMPONENT VALUE PACKAGE U1 BR1 F1 RV1 D1 REXT RGAIN VLED EC4211 B10S 1A 431KD14 (275VAC) 1N4003 24 7.5k 240V TO252-5L SMD DIP DIP DIP 0603 0603 NA Note: 1. RV1 is for Surge Protection. 2. D1 is for Hi-POT protection. E-CMOS Corp. (www.ecmos.com.tw) 3D03N Rev. F003 Page 6of 8 Constant Current Linear LED Driver EC4211 OUTLINE DIMENSIONS (Dimensions shown in millimeters) TO252-5L Package SOP-8L Package E-CMOS Corp. (www.ecmos.com.tw) 3D03N Rev. F003 Page 7of 8 Constant Current Linear LED Driver EC4211 DFN-8L Package E-CMOS Corp. (www.ecmos.com.tw) 3D03N Rev. F003 Page 8of 8