Constant Current LED Driver with PWM Dimming EC4215 FEATURES GENERAL DESCRIPTION • Universal Input Voltage Range of 120VAC±16% The EC4215 is a constant current linear high voltage LED driver for replace discrete solutions in AC/DC power application (up to 270VAC). The device can drive an output power of ±10% variation from a universal input voltage range of 120VAC±16%, or 230VAC±16% 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. The EC4215 can as a constant current sink for high voltage LED or low voltage LED strings in series. For higher current application, multiple EC4215s can also be used in parallel such as 60mA, 80mA or 160mA. The EC4215 is capable of a dimming input for adjustable LED brightness control by Pulse Width Modulation (PWM). The EC4215 is self-protected against over temperature and over current. Internal thermal foldback function regulates LED driving 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 EC4215 is available in a space saving DFN-8L exposed pad package, and the operating temperature is from – 40°C to +125°C. or 230VAC±16% • Adjusted Constant Current Operation • Low Quiescent Current • Simplifies Circuit and System Designs • Compact Component Count • Temperature Compensated Constant Current • Over Current Protection • Over Temperature Protection • LED Current Thermal Foldback for Thermal Protection • PWM Dimming Control • DFN-8L Exposed Pad Package APPLICATIONS • LED Driver • Lighting Applications • Lamp Indicators • Candle Light • Low Cost solution • Constant Current Sink TYPICAL APPLICATION CIRCUIT ＋ ILED VLED － AC BR1 R1 1 2 VFF VIN 3 D IM 4 REXT R2 LED GND GND GND 8 7 6 5 REXT Fig. 1 Simplified Application Circuit E-CMOS Corp. (www.ecmos.com.tw) 3D08N Rev. F001 1/6 Constant Current LED Driver with PWM Dimming EC4215 PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS VIN, LED Supply Voltage......................................... 550V VFF, REXT, DIM Operation Voltage................................ 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 HV Pin…………………….....… 1.2kV ESD HBM Voltage LV Pin……………………......… 3.5kV ESD MM Voltage……………………………….…..… 250V VFF 1 8 LED VIN 2 7 GND Thermal PAD DIM 3 REXT 4 6 GND DFN-8L 5 GND TOP View Fig. 2 Detailed Bloam 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 EC42151NNF2R Marking Information Remark EC4215 LLLLL YYWWT DFN-8L 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) VDIM-H VDIM-L Quiescent Current Reference Voltage (Note 3) Maximum Dropout Voltage (Note 4) DIM PIN High Threshold DIM PIN Low Threshold VIN=25Vdc, REXT=15Ω VIN=25Vdc, REXT=30Ω VDROP≧16V (Note 2) VIN=25Vdc, REXT=Open VIN= 265Vac, REXT=30Ω, VLED=220V VDIM Rising VDIM Falling MIN TYP MAX UNIT 25 38 19 40 20 500 42 21 120 V mA mA mA 170 µA V V 0.4 V V 150 0.6 1.4 Thermal Characteristic VREF Temperature Coefficient TA=-40°C ~125°C 0.01 △VREF(T) TA Operating Temperature -40 125 PD Total Power Dissipation (Operation) 1 RΘJA Thermal Resistance DFN-8L Package 33.2 Protection OCP Over Current Protection 180 OTP Over Temperature Protection 150 TFP Thermal Foldback Protection 100 Note: 1. ILED=0.6/REXT, VFF=0V, DIM=0V, LED=25V 2. VDROP=VIN－VLED, PD＜1W (No heat sink) 3. VREF=V(REXT), VFF=0V, DIM=0V 4. The current regulation is for an instantaneous AC line input current only, not to exceed thermal characteristics of package. E-CMOS Corp. (www.ecmos.com.tw) ％/℃ ℃ W ℃/W mA ℃ ℃ 3D08N Rev. F001 2/6 Constant Current LED Driver with PWM Dimming EC4215 FUNCTION DIAGRAM VIN DIM VFF LED Control Circuits Protection Circuits REXT GND Fig. 2 Detailed Bloam PIN DESCRIPTIONS PIN 1 2 3 4 5 6 7 8 Symbol VFF VIN DIM REXT GND GND GND LED Description Input voltage sensing through a voltage divider for constant output power regulation. Input supply voltage. Connect a logic level PWM signal for adjustable brightness of LED strings. An external resistor sets different current regulation for LED strings between REXT and GND pin. Ground. Ground. Ground. The LED strings are connected from input supply voltage to this pin. E-CMOS Corp. (www.ecmos.com.tw) 3D08N Rev. F001 3/6 Constant Current LED Driver with PWM Dimming EC4215 EC4215 LED Lighting Application Circuit Schematic ＋ F1 ILED VLED － AC RV1 BR1 R1 1 VFF LED VIN 3 D IM 4 REXT GND 2 R2 GND GND 8 7 6 5 REXT Fig. 3 Typical Application Circuit 110VAC 4W LED Lighting Demo Board Part List COMPONENT VALUE PACKAGE U1 BR1 F1 RV1 R1 R2 REXT VLED EC4215 B10S 1A 221KD14 (140VAC) 1.2MEG 6.19k 10 110V DFN-8L SMD DIP DIP 0603 0603 0603 NA 220VAC 4W LED Lighting Demo Board Part List COMPONENT VALUE PACKAGE U1 BR1 F1 RV1 R1 R2 REXT VLED EC4215 B10S 1A 431KD14 (275VAC) 2.49MEG 7.32k 19.1 220V DFN-8L SMD DIP DIP 0603 0603 0603 NA E-CMOS Corp. (www.ecmos.com.tw) 3D08N Rev. F001 4/6 Constant Current LED Driver with PWM Dimming EC4215 EC4215 LED Lighting With PWM Dimming Application Circuit Schematic ＋ F1 ILED VLED － AC RV1 BR1 R1 1 2 R2 VFF LED VIN GND 3 D IM 4 REXT GND GND 8 7 6 5 REXT Fig. 4 Typical Application Circuit with PWM Dimming E-CMOS Corp. (www.ecmos.com.tw) 3D08N Rev. F001 5/6 Constant Current LED Driver with PWM Dimming EC4215 DFN-8L Package E-CMOS Corp. (www.ecmos.com.tw) 3D08N Rev. F001 6/6