LED免电源驱动IC、高压驱动IC、免电源整体方案

1、EC4211Constant Current Linear LED Driver E-CMOS Corp. (.tw) 3D03N Rev. F003 Page 1of 8 RGAIN (Optional) 120Vac 60Hz Current Set Point VLED(total)=120V ILED60mA REXT FEATURES Constant LED Current for Varying Input Voltage Adjusted Current Operation Low Quiescent Current Simplifies Circuit and System

2、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 Driv

3、er 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

4、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 parall

5、el 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 m

6、aximum 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 40C to +125C. TYPICAL APPLICATION CIRCUIT Fig. 1 Simplified Application Circuit EC4211Constant Current

7、 Linear LED Driver E-CMOS Corp. (.tw) 3D03N Rev. F003 Page 2of 8 1 2 3 (SOP-8L) 4 8 7 6 5 RGAIN VLED VLED VLED VLED VIN REXT NC Thermal PAD 5 RGAIN 4 VIN 132 3 (TO252-5L) REXT NC V LED Thermal PAD DFN-8L REXT VIN NC Thermal PAD 1 2 3 45 6 7 8 V LED VLED VLED VLED RGAIN ABSOLUTE MAXIMUM RATINGS VIN S

8、upply Voltage. 500V REXT, RGAIN Operation Voltages. 6V Operating Temperature -40C to +125C Storage Temperature -55C to +150C Maximum Die Temperature. +150C Lead Temperature. +260C ESD HBM Voltage. 2.5kV ESD MM Voltage 300V PIN CONFIGURATION Note: Absolute Maximum Ratings are those values beyond whic

9、h 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 Remark EC4211NNMHR SOP-8L EC4211 YYWW LLLLLT YYW

10、W ：Date Code LLLLL：Lot No T：internal tracking code EC4211NNF2R DFN-8L EC4211 LLLLL YYWWT EC4211NNA5R TO252-5L EC4211 YYWW LLLLLT ELECTRICAL CHARACTERISTICS TA = 25C unless otherwise specified PARAMETER CONDITIONSMIN TYP MAXUNIT Electrical Characteristic VIN Operation Voltage 15 265 V ILED Current Re

11、gulation (Note 1) VIN=120Vdc, REXT=15, VLED=100V 38.16 40.17 42.18mA VIN=220Vdc, REXT=30, VLED=200V19.16 20.17 21.18mA ILED(MAX) Maximum Current Regulation VDROP16V (Note 2) 60 mA IQ Quiescent Current VIN=20Vdc, REXT=Open 170 A VREF Reference Voltage (Note 3) 0.6 V VDROP(MAX) Maximum Dropout Voltage

12、 (Note 4) VIN= 265Vac, REXT=30, VLED=220V 170 V Thermal Characteristic VREF(T) VREF Temperature Coefficient TA=-40C 125C 0.01 / TA Operating Temperature -40 125 PD Total Power Dissipation (Operation) 1 W RJA Thermal Resistance SOP-8L Package 75 /W DFN-8L Package 33.2 /W TO252-5L Package 68 /W Protec

13、tion 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=VINVLED0.6, PD1W (No heat sink) 3. VREF=V(REXT)VLED 4. The current regulation is for a instantaneous AC line input current only, not to exceed th

14、ermal characteristics of package. 5. ILED(TFP)=ILEDV(RGAIN)/RGAIN E-CMOS Corp. (.tw) 3D03N Rev. F003 EC4211Constant 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 Desc

15、ription 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 foldb

16、ack 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 tempe

17、rature 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 Detai

18、led Block Diagram E-CMOS Corp. (.tw) 3D03N Rev. F003 EC4211Constant Current Linear LED Driver Page 4of 8 18.5 19 19.5 20 20.5 21 21.5 22 -40-25-105203550658095110125 TEMPERATURE () OUTPUT CURRENT (mA) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0102030405060 INPUT VOLTAGE (V) VREF (V) 80 100 120 140 160 180 200 -

19、40-25-105203550658095110 125 TEMPERATURE () QUIESCENT CURRENT (uA) 0 5 10 15 20 25 0153045607590105120135 TEMPERATURE () OUTPUT CURRENT (mA) 0 10 20 30 40 50 60 70 80 90 100 01020304050607080 OUTPUT CURRENT (mA) REXT() 0.590 0.595 0.600 0.605 0.610 0.615 0.620 -40-25-105203550658095110 125 TEMPERATU

20、RE () VREF (V) ELECTRICAL CHARACTERISTICS (TA = 25C, 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 RGAI

21、N=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 E-CMOS Corp. (.tw) 3D03N Rev. F003 EC4211Constant Current Linear LED Driver Page 5of 8 ELECTRICAL CHARACTERISTICS (Continuted) TRANSIENT RESPONSE TRANSIENT RESPONSE OVER CURREN

22、T 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 E-CMOS Corp. (.tw) 3D03N Rev. F003 EC4211Constant Current Linear LED Driver Page 6of 8 BR1 AC Current Set Point VLED ILED 4 1 3 TO252-5 REXT RGAIN (Optional) 5 F1 RV1 D1 LED Lighting EC4211 Application Circuit Schematic 110VAC 4W