User Guide for FEBFL7734_L55H008A Evaluation Board 8.6 W LED Driver at High Line Featured Fairchild Product: FL7734MX Direct questions or comments about this evaluation board to: “Worldwide Direct Support” Fairchild Semiconductor.com © 2015 Fairchild Semiconductor Corporation 1 FEBFL7734_L55H008A • Rev. 1.0 Table of Contents 1. Introduction ............................................................................................................................... 3 1.1. General Description of FL7734MX ................................................................................. 3 1.2. Controller Features........................................................................................................... 3 1.3. Controller Internal Block Diagram .................................................................................. 4 2. Evaluation Board Specifications ............................................................................................... 5 3. Evaluation Board Photographs ................................................................................................. 6 4. Evaluation Board Printed Circuit Board (PCB) ........................................................................ 7 5. Evaluation Board Schematic ..................................................................................................... 8 6. Evaluation Board Bill of Materials (BOM) .............................................................................. 9 7. Transformer Design ................................................................................................................ 11 8. Evaluation Board Performance ............................................................................................... 12 8.1. Startup ............................................................................................................................ 12 8.2. Operation Waveforms .................................................................................................... 13 8.3. Constant-Current Regulation ......................................................................................... 14 8.4. Short- / Open-LED Protections ...................................................................................... 15 8.5. Secondary Diode / Sensing Resistor Short Protection ................................................... 17 8.6. Efficiency ....................................................................................................................... 19 8.7. Power Factor (PF) & Total Harmonic Distortion (THD) .............................................. 20 8.8. Dimming Operation ....................................................................................................... 21 8.9. Operating Temperature .................................................................................................. 25 8.10. Electromagnetic Interference (EMI) .............................................................................. 26 9. Revision History ..................................................................................................................... 27 © 2015 Fairchild Semiconductor Corporation 2 FEBFL7734_L55H008A • Rev. 1.0 This user guide supports the evaluation board for the FL7734MX. It should be used in conjunction with the FL7734MX datasheet as well as Fairchild’s application notes and technical support team. Please visit Fairchild’s website at www.fairchildsemi.com. 1. Introduction This document describes a high performance phase-cut dimming LED driver solution with excellent dimmer compatibility. The input voltage range of the LED driver board is 198 VRMS ~ 264 VRMS and there is one DC output with a constant current of 360 mA at 24 V. Also in this document is a general description of the FL7734MX, the power supply solution specification, schematic, bill of materials, and typical operating characteristics. 1.1. General Description of FL7734MX The FL7734 is a highly integrated PWM controller with advanced Primary-SideRegulation (PSR) technique to minimize components in low power LED lighting solutions. Using the innovative TRUECURRENT® technology for tight constant current control, it enables design with Constant Current (CC) tolerance of less than ±1% over universal line voltage range to meet stringent LED brightness requirements. FL7734 operates with all types of phase cut dimmers. Phase cut dimming is managed smoothly by Fairchild’s proprietary constant input current control, switching mode control and bleeding current control to achieve excellent dimmer compatibility without visible flicker. The controller can automatically detect when there is no dimmer connected. In non dimming mode, the operating mode is set to optimize Power Factor (PF) and Total Harmonic Discharge (THD) by enabling linear frequency control and voltage mode control with Discontinuous Conduction Mode (DCM) operation. An external bleeding MOSFET also acts as the high-voltage startup circuit to implement fast startup and high system efficiency. The FL7734 also provides powerful protections, such as LED open / short, sensing resistor shorted, and over-temperature for high system reliability. 1.2. Controller Features High Performance Excellent Dimmer Compatibility by Active Dimming Control Programmable Dimming Curve and Input Current Management Constant LED Current Regulation in Large Phase Angle Range Cost-Effective Solution without Input Bulk Capacitor and Feedback Circuitry Power Factor Correction in Non-Dimming Mode Excellent CC Tolerance: o <±0.14 % Over the range of ±10% Input Line Voltage Variation Fast Startup utilizing Bleeding Circuit o < 0.1 s at the Max. Dimmer Phase Angle o <0.5 s at the Min. Dimmer Phase Angle High Reliability LED Short / Open Protection Output Diode Short Protection Sensing Resistor Short / Open Protection VDD Over-Voltage Protection (OVP) VDD Under-Voltage Lockout (UVLO) Over-Temperature Protection (OTP) All Protections are Auto Restart Cycle-by-Cycle Current Limit © 2015 Fairchild Semiconductor Corporation 3 FEBFL7734_L55H008A • Rev. 1.0 1.3. Controller Internal Block Diagram MBLD BLD RBLD BIAS VDD 11 12 16 7 VIN 9 5 MOD 3 FB 6 TCIC 2 VDD.ON 10.6 V / 7.75 V Biasing Management Phase Angle Detection DIM 10 Protections Short-LED Protection Open-LED Protection VDD Over-Voltage Protection Thermal Shutdown Over-Current Protection Sensing Resistor Short-Protection Error Amp. Active DIM Control VEAI Auto-recovery Mode R ITCIC S Gate Driver Q Linear Frequency Controller OSC IHOLD HOLD Line Compensation 4 15 8 13 1 SG CS VS Figure 1. © 2015 Fairchild Semiconductor Corporation TRUECURRENT® Calculation PG 4 14 GATE VEAI Block Diagram FEBFL7734_L55H008A • Rev. 1.0 2. Evaluation Board Specifications Table 1. Evaluation Board Specifications for LED Lighting Bulb Description Symbol Value Comments VIN.MIN 198 VAC Minimum AC Input Voltage VIN.MAX 230 VAC Maximum AC Input Voltage VIN.NOMINAL 264 VAC Nominal AC Input Voltage fIN 60 Hz / 50 Hz Line Frequency VOUT.MIN 21 V Minimum Output Voltage VOUT.MAX 27 V Maximum Output Voltage VOUT.NOMINAL 24 V Nominal Output Voltage IOUT.NOMINAL 360 mA Nominal Output Current < ±0.14% Line Input Voltage Change: 198~264 VAC < ±0.56% Output Voltage Change: 21~27 V Eff198VAC 83.7% Efficiency at 198 VAC Input Voltage Eff230VAC 83.9% Efficiency at 230 VAC Input Voltage Eff264VAC 83.4% Efficiency at 264 VAC Input Voltage PF / THD198VAC 0.97 / 9.9% PF/THD at 198 VAC Input Voltage PF / THD230VAC 0.96 / 11.4% PF/THD at 230 VAC Input Voltage PF / THD264VAC 0.95 / 13.7% PF/THD at 264 VAC Input Voltage FL7734MX TFL7734MX 66.9°C Open-Frame Condition (TA = 25°C) FL7734MX Temperature Primary MOSFET TMOSFET 63.1°C Primary MOSFET Temperature Secondary Diode TDIODE 66.8°C Secondary Diode Temperature Transformer TTRANSFORMER 66.1°C Transformer Temperature Voltage Input Frequency Voltage Output Current Efficiency PF/THD Temperature © 2015 Fairchild Semiconductor Corporation CC Deviation 5 FEBFL7734_L55H008A • Rev. 1.0 3. Evaluation Board Photographs Dimensions: 62.1 mm (L) x 28 mm (W) x 22 mm (H) Figure 2. Figure 3. © 2015 Fairchild Semiconductor Corporation 6 Top View Bottom View FEBFL7734_L55H008A • Rev. 1.0 4. Evaluation Board Printed Circuit Board (PCB) 38.2 5.2 6.1 28.0 12.5 14.0 4.8 62.0 Figure 4. Top Pattern (mm) . Figure 5. © 2015 Fairchild Semiconductor Corporation 7 Bottom Pattern (mm) FEBFL7734_L55H008A • Rev. 1.0 5. Evaluation Board Schematic R22 18k C14 1n F1 MOV1 R20 110k R25 8.2k R1 4.7k R24 330k C11 33n R21 0 C15 1µ Q4 2N7002K D56 1N4148WS BD1 MB6S C13 470n R23 68k R26 8.2k C1 68n/500V SMD VDD FL7734 VS PG GATE TCIC MOD CS BLD BIAS HOLD DIM FB VIN MBLD RBLD SG R28 2M R27 110k C18 100p C8 22µ/35V R11 150 R10 43 R12 2M R13 1k C9 6.8n R17 15 Q3 FQN1N50C Q1 FDD3N50NZ R29 100 R2 500 R4 22 ZD2 R8 6.2V 1k R31 27k C6 10n C2 33n R5 51k D1 RS1M C3 68n L1 10m ZD1 30V C5 47n/ 500V SMD Q2 FQU5N60C R6 240k R16 160 R32 8R2 C10 10p C4 2.2n R15 3R3 D4 RS1M R14 1R2 R7 240k D2 S1J R18 280k R19 33k T1 RM6 1.7 mH D6 S320 C16 470µ/35V C17 4.7n R30 24k VLED+ VLED- FEBFL7734_L55H008A • Rev. 1.0 8 © 2015 Fairchild Semiconductor Corporation Schematic Figure 6. 6. Evaluation Board Bill of Materials (BOM) Item Part Reference No. 1 F1 2 MOV1 3 BD1 4 R1 5 6 Part Number Description Manufacturer SS-5-1A 1 A/250 V Fuse SVC 471 D-07A Metal Oxide Varistor Samwha MB6S 600 V/0.5 A SOIC-4 Fairchild MOR 1W TC 4.7K Metal Oxide Film Resistor RSD Type J 4.7 k/1 W R-Forming R2 MOR 2W TC 500R Metal OxideFilm Resistor RSD Type J 500 /2 W R-Forming R4 RC0805JR-0722RL 22 SMD Resistor 2012 F 1/4 W Yageo 7 R5 RC0603 JR-0751KL 51k SMD Resistor 1608 F 1/16 W Yageo 8 R7 RC1206 JR-07240KL 240 k SMD Resistor 3216 F 1/4 W Yageo 9 R6 RC0603 JR-07240KL 240 k SMD Resistor 1608 F 1/16 W Yageo 10 R8 RC0805 JR-071KL 1 k SMD Resistor 2012 F 1/8 W Yageo 11 R10 RC1206 JR-0743RL 43 SMD Resistor 3216 F 1/4 W Yageo 12 R11 RC1206 JR-07150RL 150 SMD Resistor 3216 F 1/4 W Yageo 13 R12 RC1206 JR-072ML 2 M SMD Resistor 3216 F 1/4 W Yageo 14 R13 RC0805 JR-071KL 1 k SMD Resistor 2012 F 1/8W Yageo 15 R14 RC0805 JR-071R2L 1R2 SMD Resistor 2012 1/4 W F Yageo 16 R15 RC0805 JR-073R3L 3R3 SMD Resistor 2012 1/4 W F Yageo 17 R16 RC0805 JR-07160RL 160 SMD Resistor 2012 F 1/4 W Yageo 18 R17 RC0805 JR-0715RL 15 SMD Resistor 2012 F 1/4 W Yageo 19 R18 RC0603 JR-07280KL 280 k SMD Resistor 1608 F 1/16 W Yageo 20 R19 RC0603 JR-0733KL 33 k SMD Resistor 1608 F 1/16 W Yageo 21 R20 RC0603 JR-07110KL 110 k SMD Resistor 1608 F 1/16 W Yageo 22 R21 RC0603 JR-070R0L 0 SMD Resistor 1608 F 1/16 W Yageo 23 R22 RC0603 JR-0718KL 18 k SMD Resistor 1608 F 1/16 W Yageo 24 R23 RC0603 JR-0768KL 68 k SMD Resistor 1608 F 1/16 W Yageo 25 R24 RC0603 JR-07330KL 330 k SMD Resistor 1608 F 1/16 W Yageo 26 R25 RC0603 JR-078R2KL 8.2 k SMD Resistor 1608 F 1/16 W Yageo 27 R26 RC0603 JR-078R2KL 8.2 k SMD Resistor 1608 F 1/16 W Yageo 28 R27 RC0805 JR-07110KL 110 k SMD Resistor 2012 F 1/4 W Yageo 29 R28 RC1206 JR-072ML 2M SMD Resistor 3216 F 1/4 W Yageo 30 R29 RC0805 JR-07100RL 100 SMD Resistor 2012 1/4 W F Yageo 31 R30 RC0805 JR-0724KL 24 k SMD Resistor 2012 F 1/4 W Yageo 32 R31 RC0603 JR-0727KL 27 k SMD Resistor 1608 F 1/16 W Yageo 33 R32 RC0805 JR-078R2L 8.2 SMD Resistor 2012 F 1/4 W Yageo 34 C1 C1206V683KCRACTU 68 nF/500 V SMD Capacitor 3216 X7R Kemet 35 C2 MPE 630V333 MPE33 nF/630 V 12.5 x 10.0 x 5.0 mm Sungho Electronics 36 C3 MPE 630V683 MPE 68 nF/630 V 12.5 x 10.0 x 5.0 mm Sungho Electronics 37 C5 C1206V473KCRACTU 47 nF/500 V SMD Capacitor 3216 X7R Kemet 38 C4 C1206C222KDRACTU 2.2 nF/1 kV SMD Capacitor 3216 Kemet © 2015 Fairchild Semiconductor Corporation 9 Bussmann ABC ABC FEBFL7734_L55H008A • Rev. 1.0 BOM (Continued) Ite m No. Part Reference 39 C6 GRM1885C1E103JA01# 10 nF/16 V SMD Capacitor 1608 COG 40 C8 KMG 22µF35V KMG series 22 µF/35 V D5 X H11 105°C Electrolytic Capacitor 41 C9 GRM2192C1H682JA01# 6.8 nF/50 V SMD Capacitor 2012 CH Murata 42 C10 C0603C100K8GACTU 10 pF/10 V SMD Capacitor 1608 NP0 Kemet 43 C11 GRM21A1X1H333JA39# 33 nF/50 V SMD Capacitor 2012 SL Murata 44 C13 GRM188B11A474KA61# 470 nF/10 V SMD Capacitor 1608 B Murata 45 C14 GRM1881X1E102JA01# 1 nF/10 V SMD Capacitor 1608 SL Murata 46 C15 GRM185D71A105KE36# 1 µF/10 V SMD Capacitor 1608 X7T Murata 47 C16 KMG 470µF35V KMG Series 470 µF/35 V D10 X H12.5 105°C Electrolytic Capacitor Samyoung 48 C17 SCF2E472M14DW7 Y Cap 4700 pF Samwha Capacitor 49 C18 GRM1882C1H101JA01# SMD Capacitor CH 100 pF/50 V 50 L1 R06103KT00 Radial inductor 10 mH size Φ6.5 mm X H7.5 mm Molding Color Green 51 T1 RM6 core Core RM6 PC40 Bobbin BRM6-716CPFR 52 D1 RS1M 1000 V/1.0 A SMA Package Fast Recovery Diode Fairchild 53 D2 S1J 600 V/1.0 A SMA Package General Purpose Diode Fairchild 54 D4 RS1M 1000 V/1.0 A SMA Package Fast Recovery Diode Fairchild 55 D56 1N4148WS 100 V/0.3 A SOD-323 Package General Purpose Diode Fairchild 56 D6 S320 200 V/3.0 A SMB Package Schottky Rectifier Fairchild 57 ZD1 MM3Z30B 30 V Zener Diode SOD-323 Fairchild 58 ZD2 MM3Z6V2B 6.2 V Zener Diode SOD-323 Fairchild 59 Q1 FDD3N50NZ N-ch Mosfet 500 V/3 A D-Pak Fairchild 60 Q2 FQU5N60C N-ch Mosfet 600 V/5 A I-Pak Fairchild 61 Q3 FQN1N50C N-ch Mosfet 500 V/0.38 A TO-92 Fairchild 62 Q4 2N7002K N-ch Mosfet 60 V/0.3 A SOT-23 Fairchild 63 U1 FL7734MX Triac Dimmable LED Driver IC Fairchild Part Number © 2015 Fairchild Semiconductor Corporation Manufactur er Description 10 Murata Samyoung Bosung TDK FEBFL7734_L55H008A • Rev. 1.0 7. Transformer Design 5 4 1 6 RM6 (PC47) NP1 NA2 NP2 NA1 3 Top View 2 3 5 4 NS+ 6 NS 1 Figure 7. NS- 2 Transformer Bobbin Structure and Pin Configuration NP2(6 – 2) NA2(5 – 3) 2mm 2mm NS (NS- – NS+) NA1(4 – 5) 2mm 2mm NP1(1 – 6) Figure 8. Table 2. Transformer Winding Structure Winding Specifications No. Winding Pin (S → F) Wire Turns Winding Method 1 NP1 1 6 0.13φ 73 Ts Solenoid Winding 2 Insulation: Polyester Tape t = 0.025 mm, 2-Layer NA1 3 4 0.13φ 45 20 Ts Solenoid Winding Insulation: Polyester Tape t = 0.025 mm, 2-Layer NS 5 6 NS- NS+ 0.2φ (TIW) 44 Ts Solenoid Winding Insulation: Polyester Tape t = 0.025 mm, 2-Layer NA2 7 8 0.13φ 5 3 20 Ts Solenoid Winding Insulation: Polyester Tape t = 0.025 mm, 2-Layer NP2 9 10 Table 3. 0.13φ 62 51 Ts Solenoid winding Insulation: Polyester Tape t = 0.025 mm, 2-Layer Electrical Characteristics Pins Specifications Remark Inductance 6–2 1.7 mH ±10% 60 kHz, 1 V Leakage 6–2 30 µH 60 kHz, 1 V, Short All Output Pins © 2015 Fairchild Semiconductor Corporation 11 FEBFL7734_L55H008A • Rev. 1.0 8. Evaluation Board Performance Table 4. Test Condition & Equipment List Ambient Temperature TA = 25°C AC Power Source: PCR500L by Kikusui Power Analyzer: PZ4000000 by Yokogawa Electronic Load: PLZ303WH by KIKUSUI Multi Meter: 2002 by KEITHLEY, 45 by FLUKE Oscilloscope: 104Xi by LeCroy Thermometer: Thermal CAM SC640 by FLIR SYSTEMS LED: EHP-AX08EL/GT01H-P03 (3 W) by Everlight Test Equipment 8.1. Startup Figure 9 shows the overall startup performance at rated output load when no dimmer is connected. The output load current starts flowing at least 0.06 s after the AC input power switch turns on for input voltage 230 VAC condition. CH1: VIN (100 V / div), CH2: VDD (10 V / div), CH3: VCS (500 mV / div), CH4: ILED (100 mA / div), Time Scale: (100 ms / div), Load: 8 series-connected LEDs. 0.07s Figure 9. © 2015 Fairchild Semiconductor Corporation 12 VIN = 230 VAC / 50 Hz FEBFL7734_L55H008A • Rev. 1.0 8.2. Operation Waveforms Figure 10 through Figure 12 show AC input and output waveforms at rated output load. CH1: VIN (100 V / div), CH2: VCS (500 mV / div), CH3: IIN (100 mA / div), CH4: ILED (200 mA / div), Time Scale: (5 ms / div), Load: 8 series-connected LEDs. Figure 10. Figure 12. VIN = 198 VAC / 50 Hz Figure 11. VIN = 230 VAC / 50 Hz VIN = 264 VAC / 50 Hz © 2015 Fairchild Semiconductor Corporation 13 FEBFL7734_L55H008A • Rev. 1.0 8.3. Constant-Current Regulation Output current deviation over the output voltage ranges, from 21 V to 27 V, is less than ±0.56% at each line voltage. Line regulation at the rated output voltage (24 V) is less than ±0.14%. The results were measured with Electronic Load [CR Mode]. 30 Output Voltage [V] 198Vac 28 230Vac 26 264Vac 24 22 20 18 240 260 280 300 320 340 360 Output Current [mA] Figure 13. Table 5. Constant-Current Regulation Constant-Current Regulation by Output Voltage Change (21 ~ 27 V) Input Voltage Min. Current [mA] Max. Current [mA] Tolerance 198 VAC [60 Hz] 360 361 ±0.14% 230 VAC [60 Hz] 357 361 ±0.56% 264 VAC [60 Hz] 357 360 ±0.42% Table 6. Constant-Current Regulation by Line Voltage Change (198 ~ 264 VAC) Output Voltage 198 VAC [50 Hz] 230 VAC [50 Hz] 264 VAC [50 Hz] Tolerance 27 V 360 mA 361 mA 360 mA ±0.14% 24 V 360 mA 360 mA 359 mA ±0.14% 21 V 358 mA 357 mA 357 mA ±0.14% © 2015 Fairchild Semiconductor Corporation 14 FEBFL7734_L55H008A • Rev. 1.0 8.4. Short- / Open-LED Protections Figure 14 shows a waveform for the protection and AR operation when the LED is shorted. Once the LED short occurs, SLP is triggered and the controller then shuts down the switching MOSFET. After 4 s, the Startup sequence reinitiates. This behavior lasts until the fault condition is removed. Systems can restart automatically when normal condition resumes at least 4 seconds. CH1: VIN (100 V / div), CH3: VGATE (10 V / div), CH4: VOUT (5 V / div), Time Scale: (1 s / div), Load: 8 series-connected LEDs. 4s Auto Restart LED short Figure 14. © 2015 Fairchild Semiconductor Corporation 15 VIN = 230 VAC / 50 Hz FEBFL7734_L55H008A • Rev. 1.0 Figure 15 shows a waveform for the protection and AR operation when the LED is opened. Once the LED load is disconnected, VS OVP or VDD OVP is triggered and the controller then shuts down the switching MOSFET. After 4 s, Startup sequence reinitiates. This behavior lasts until the fault condition is removed. Systems can restart automatically when normal condition resumes at least 4 seconds. CH1: VIN (100 V / div), CH3: VGATE (10 V / div), CH4: VOUT (5 V / div), Time Scale: (1 s / div), Load: 8 seriesconnected LEDs. 4s Auto Restart LED Open Figure 15. VIN = 230 VAC / 50 Hz If the LED load is re-connected after an open-LED condition, the output capacitor is quickly discharged through the LED load and the inrush current due to the discharge could destroy LED load. © 2015 Fairchild Semiconductor Corporation 16 FEBFL7734_L55H008A • Rev. 1.0 8.5. Secondary Diode / Sensing Resistor Short Protection Figure 16 shows a waveform for the protection operation when the secondary diode is shorted. VCS is monitored during the gate turn-on time to detect over-current except for LEB time. Once VCS goes higher than VCS-OCP (1.8 V) after the LEB time, OCP is triggered and the controller then shuts down the switching MOSFET. Ipeak amplitude can be adjusted by using different magnetizing inductance. CH1: VIN (100 V / div), CH2: VCS (500 mV / div), CH3: VGATE (10 V / div), Time Scale: (10 ms / div), Load: 8 seriesconnected LEDs. Secondary diode short Minimum turn-on time Figure 16. VIN = 230 VAC / 50 Hz After 4 s, startup operation starts again. This behavior lasts until the fault condition is removed. Systems can restart automatically when normal condition resumes at least 4 seconds. . © 2015 Fairchild Semiconductor Corporation 17 FEBFL7734_L55H008A • Rev. 1.0 Figure 17 shows a waveform for the protection operation when the sensing resistor is shorted. If VCS doesn’t reach VCS-SRSP (0.1 V) within the initial two switching operations during the Startup period, SRSP is triggered and the controller then shuts down the switching MOSFET. CH1: VIN (100 V / div), CH2: VCS (500 mV / div), CH3: VGATE (10 V / div), Time Scale: (10 ms / div), Load: 8 series-connected LEDs. Figure 17. VIN = 230 VAC / 50 Hz After 4 s, Startup operation starts again. This behavior lasts until the fault condition is removed. Systems can restart automatically when normal condition resumes at least 4 seconds. © 2015 Fairchild Semiconductor Corporation 18 FEBFL7734_L55H008A • Rev. 1.0 8.6. Efficiency System efficiency is over 83% from 198 ~ 264 VAC. The results were measured using actual, rated LED loads 5 minutes after startup. 100 Eff [%] 90 80 70 60 50 180 200 220 240 260 280 Input voltage [V] Figure 18. Table 7. System Efficiency System Efficiency Input Voltage Input Power Output Current Output Voltage Output Power Efficiency 198 VAC [60 Hz] 10.32 W 0.360 A 24 V 8.640 W 83.70% 230 VAC [60 Hz] 10.26 W 0.359 A 24 V 8.616 W 83.94% 264 VAC [60 Hz] 10.33 W 0.359 A 24 V 8.616 W 83.40% © 2015 Fairchild Semiconductor Corporation 19 FEBFL7734_L55H008A • Rev. 1.0 8.7. Power Factor (PF) & Total Harmonic Distortion (THD) The FL7734MX evaluation board shows excellent THD performance, less than 13%. Power factor has enough margins from 0.9. The results were measured using actual, rated LED loads 5 minutes after startup. PF THD 1 16.00% 0.98 PF THD 14.00% 0.96 12.00% 0.94 10.00% 0.92 8.00% 0.9 0.88 6.00% 180 200 220 240 260 280 Input voltage [V] Figure 19. Table 8. Power Factor & Total Harmonic Distortion Power Factor & Total Harmonic Distortion Input Voltage Output Current Output Voltage Power Factor THD 198 VAC [60 Hz] 0.360 A 24 V 0.97 9.9% 230 VAC [60 Hz] 0.359 A 24 V 0.96 11.4% 264 VAC [60 Hz] 0.359 A 24 V 0.95 13.7% © 2015 Fairchild Semiconductor Corporation 20 FEBFL7734_L55H008A • Rev. 1.0 8.8. Dimming Operation Figure 20 to Figure 22 shows the overall startup performance with dimmer connected at the rated output load. The output load current starts flowing 0.36 s after the AC input power switch turns on at small dimmer phase angle for input voltage 230 VAC condition. CH1: VIN (100 V / div), CH2: VDD (10 V / div), CH4: ILED (100 mA / div), Time Scale: (100 ms / div), Load: 8 seriesconnected LEDs. 0.06s Figure 20. Max Phase Angle Dimming 0.14s Figure 21. © 2015 Fairchild Semiconductor Corporation 21 Half Phase Angle Dimming FEBFL7734_L55H008A • Rev. 1.0 0.36s Figure 22. Min Phase Angle Dimming Figure 23 demonstrates the dimming operation with a dimmer connected at the rated output load. Active DIM Control in FL7734MX provides stable dimmer operation and implements flicker-free dimming operation. CH1: VIN (100 V / div), CH2: CS (500 mV / div), CH4: ILED (100 mA / div), Time Scale: (100 ms / div), Load: 8 series-LEDs. Figure 23. © 2015 Fairchild Semiconductor Corporation 22 Max. Phase Angle Dimming FEBFL7734_L55H008A • Rev. 1.0 Figure 24 shows a dimming curve which is obtained by rotating the dimmer switch. Regardless of input line voltage ±10% variation, LED current is constantly regulated from 180 to 130° dimmer phase angle .When the phase angle is below 130°, LED current decreases linearly according to internal dimming reference modulation. FL7734MX dimming control method can meet NEMA SSL-7A specification. Figure 25 indicates the maximum and minimum dimmed output range as specified by NEMA SSL7A. 400 Allowable range for maximum LLE light output 198Vac 350 300 230Vac MLO (measured) 264Vac LED current [mA] 250 200 150 100 50 Allowable range for minimum LLE light output RMLO (measured) 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 Phase-cut Angle [Degree] Figure 24. Figure 25. © 2015 Fairchild Semiconductor Corporation 23 Dimming Curve NEMA SSL-7A Specification FEBFL7734_L55H008A • Rev. 1.0 Table 9 demonstrates that FL7734MX evaluation board has excellent dimmer compatibility without flicker and the minimum output current can be less than 5% of the rated output current when evaluated with most dimmer. It also operates well with both forward phase dimmer and reverse phase dimmer. Table 9. Dimmer compatibility Manufacturer Dimmer S/N Condition Max. Current [mA] Min. Current [mA] Flicker BUSCH 2247U 230 V/50 Hz 361 11 NO BUSCH 2250 230 V/50 Hz 361 8.3 NO BUSCH 2200 230 V/50 Hz 360 13.6 NO GIRA 226200 230 V/50 Hz 359 7 NO JUNG 225NVDE 230 V/50 Hz 361 7.5 NO JUNG ST550 230 V/50 Hz 361 0 NO JUNG 266GDE 230 V/50 Hz 360 9.7 NO JUNG 244EX 230 V/50 Hz 363 6.5 NO PEHA 436 230 V/50 Hz 362 10 NO GIRA 2608 230 V/50 Hz 360 10 NO VosslohSchwabe 172774 230 V/50 Hz 360 7.6 NO KOPP 8033 230 V/50 Hz 360 11.8 NO MERTEN 572199 230 V/50 Hz 359 4 NO JIN HEUNG SA04003 220 V/60 Hz 361 8.7 NO JIN HEUNG SA04003-3004 220 V/60 Hz 361 4 NO NANO SKD-500 220 V/60 Hz 360 4.5 NO Legrand 0 488 69 100-240/50-60 Hz 355 3.1 NO DAESUNG SKD-500 220 V/60 Hz 359 2.3 NO CLIPSAL 32E450TM 230 V/50 Hz 361 43 NO MERTEN 577129 230 V/50 Hz 359 50 NO EVERFLORISH EF700DC 230 V/50 Hz 359 46 NO GIRA 4210 230 V/50 Hz 360 46 NO © 2015 Fairchild Semiconductor Corporation 24 FEBFL7734_L55H008A • Rev. 1.0 8.9. Operating Temperature Temperatures on all components on this board are less than 72ºC. The results were measured using the rated LED loads after 60 minutes burn-in. Bottom Top Transformer 65.9° FL7734MX 66.9° MOSFET 58.3° Figure 26. Secondary diode 55.3° Non-Dimming Mode VIN=230 VAC Figure 27. Non-Dimming Mode VIN=230 VAC Top Bottom FL7734MX 64.4° Damper resistor 65.6° Transformer 66.1° Bleeding MOSFET 71.1° Secondary diode 66.8° MOSFET 63.1° Figure 28. Dimming Mode VIN=230 VAC © 2015 Fairchild Semiconductor Corporation Figure 29. Dimming Mode VIN=230 VAC 25 FEBFL7734_L55H008A • Rev. 1.0 8.10. Electromagnetic Interference (EMI) All measurements were conducted in observance of EN55022 criteria. The results were measured using rated LED loads after 60 minutes burn-in. Figure 30. Figure 31. © 2015 Fairchild Semiconductor Corporation 26 VIN [230VAC, Live] VIN [230 VAC, Neutral ] FEBFL7734_L55H008A • Rev. 1.0 9. Revision History Rev. Date Description 1.0.0 Feb. 2015 Initial Release WARNING AND DISCLAIMER Replace components on the Evaluation Board only with those parts shown on the parts list (or Bill of Materials) in the Users’ Guide. Contact an authorized Fairchild representative with any questions. The Evaluation board (or kit) is for demonstration purposes only and neither the Board nor this User’s Guide constitute a sales contract or create any kind of warranty, whether express or implied, as to the applications or products involved. Fairchild warrantees that its products meet Fairchild’s published specifications, but does not guarantee that its products work in any specific application. Fairchild reserves the right to make changes without notice to any products described herein to improve reliability, function, or design. Either the applicable sales contract signed by Fairchild and Buyer or, if no contract exists, Fairchild’s standard Terms and Conditions on the back of Fairchild invoices, govern the terms of sale of the products described herein. DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ANTI-COUNTERFEITING POLICY Fairchild Semiconductor Corporation's Anti-Counterfeiting Policy. Fairchild's Anti-Counterfeiting Policy is also stated on our external website, www.fairchildsemi.com, under Sales Support. Counterfeiting of semiconductor parts is a growing problem in the industry. All manufacturers of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard performance, failed applications, and increased cost of production and manufacturing delays. Fairchild is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. Fairchild strongly encourages customers to purchase Fairchild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above. Products customers buy either from Fairchild directly or from Authorized Fairchild Distributors are genuine parts, have full traceability, meet Fairchild's quality standards for handling and storage and provide access to Fairchild's full range of up-to-date technical and product information. Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address any warranty issues that may arise. Fairchild will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources. Fairchild is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors. © 2015 Fairchild Semiconductor Corporation 27 FEBFL7734_L55H008A • Rev. 1.0