Fairchild Reference Design RD-552

Fairchild Reference Design RD-552 Application www.fairchildsemi.com The following reference design supports inclusion of FL7734MX in design of an LED Driver with Phase-cut dimmable function. It should be used in conjunction with the FL7734MX datasheet. Please visit Fairchild s website at http://www.fairchildsemi.com. Fairchild Device Input Voltage Range Rated Output Power Output Voltage (Rated Current) Topology LED Driver FL7734 108-132 V AC 56 W 46 V (1220 ma) Flyback Key Features Performance < ±1.8% Total Constant Current Tolerance Over All Conditions < ±1.7% Over low Line Voltage Variation < 0.2% from 45% to 100% Load Voltage Variation Excellent Dimmer Compatibility by Active Dimming Control Programmable Dimming Curve and Input Current Management 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 Power Factor Correction in Non-dimming Mode Constant LED Current Regulation in Large Phase Angle Range System Protection 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 (AR) Cycle-by-Cycle Current Limit 2015 Fairchild Semiconductor Corporation 1 RD-552_FL7734 Rev. 1.0

2015 Fairchild Semiconductor Corporation 2 RD-552_FL7734 Rev. 1.0 1. Schematic MOD DIM FB RBLD CS PG VDD GATE VIN HOLD TCIC BLD MBLD VS SG BIAS C116 150n C117 680n C13 470n C15 1u C8 22u/35V C10 10p C122 470u/63V R28 620k R27 75k R20 33k R21 82k R22 12k R23 91k R10 47 R11 120 R12 620k R14 0R22 R18 220k R19 27k D2 1N4007 D6 RURP1560 L1 1.0 m BD1 G3SBA60 FL7734 Q1 FCPF600N60Z Q2 FCPF600N60Z C17 220pF C4 10n D4 RS1M R16 51 C14 3.3n D1 1N4007 F1 MOV1 C9 6.8n R15 0R27 T1 PQ3220 R114 200/2W Q3 FCPF600N60Z R118 36k C6 8.2n R119 91k ZD2 6.2V R30 200k R17 15 R13 1k R116 2R0/2W R117 1k R29 51 Q4 2N7002K VLED+ VLED- R111 250 C18 100p C121 470u/63V C120 470u/63V R124 30 R125 30 C119 560pF/500V R115 200/2W R122 100k ZD3 15V C112 Open C111 68n D5 EGP30K C114 330n LF1 40mH R121 100k R120 100k R127 180k R128 0R22 C19 2n ZD4 24V R33 2k D3 1N4148WS C124 Figure 1. Schematic

2. Transformer Required Components 1 PQ3220, 12P[V] 1 12 NP1 9 MFG: TDK Material: PC40 Core: PQ3220 Bobbin: 12-pin, remove pins 2,3,10 Insulation Tape: Polyester,.050mm, 3M 1350 or Eq. Figure 2. 6 Top View Transformer Bobbin Structure and Pin Configuration 7 2 3 4 5 NP2 NA NS 11 N A (4 à5) N P2 (2 à1) N S (9 à11) Start 2mm Barrier N P1 (3 à2) Figure 3. Transformer Winding Structure 2.1. Winding Specification Winding Pins (S F) Wire (Diameter) Turns Layers Winding Direction Winding Method N P1 3 2 0.45 φ 7 1 Forward Solenoid Insulation: 1 tape layer between coil and finish lead, 1 tape layer after winding N S 9 11 0.7 φ TIW 16 1 Forward Solenoid Insulation: 1 tape layer between coil and finish lead, 1 tape layer after winding N P2 2 1 0.45 φ 7 1 Forward Solenoid Insulation: 1 tape layer between coil and finish lead, 1 tape layer after winding N A 4 5 0.2 φ 8 1 Forward Solenoid Insulation: 1 tape layer between coil and finish lead, 3 tape layers after winding 2015 Fairchild Semiconductor Corporation 3 RD-552_FL7734 Rev. 1.0

2.2. Electrical Characteristics 3. Bill of Material Item No. Part Reference Pin Specification Remarks Inductance 3 1 100 µh ± 5 % 50 khz, 1 V AC Leakage 3 1 < 10 µh Short all other pins Part Number Description Manufacturer 1 F1 SS-5-2A 2 A/250 V Fuse Bussmann 2 MOV1 SVC471D-10A Metal Oxide Varistor Samwha 3 BD1 G3SBA60 4 A / 600 V, Bridge Diode Vishay 4 R111 MOR 1W TC 270 Metal Oxide Film Resistor RSD Type J 270 /1W R-Forming ABC 5 R114 MOR 2W TC 200R Metal Oxide Film Resistor RSD Type J 200 /2W R-Forming ABC 6 R115 MOR 2W TC 200R Metal Oxide Film Resistor RSD Type J 200 /2W R-Forming ABC 7 R116 MOR 2W TC 2R Metal Oxide Film Resistor RSD Type J 2 /2W R-Forming ABC 8 R117 RC0805 JR-071KL 1 k SMD Resistor 2012 F 1/8W Yageo 9 R118 RC0603 JR-0736KL 36 k SMD Resistor 1608 F 1/16W Yageo 10 R119 RC0603 JR-0791KL 91 k SMD Resistor 1608 F 1/16W Yageo 11 R120 RC1206JR-07100KL 100 k SMD Resistor 3216 F 1/4W Yageo 12 R121 RC1206JR-07100KL 100 k SMD Resistor 3216 F 1/4W Yageo 13 R122 RC1206JR-07100KL 100 k SMD Resistor 3216 F 1/4W Yageo 14 R123 MOR 1W TC 3R3K Metal Oxide Film Resistor RSD type J 3.3 / 1W R-Forming ABC 15 R124 RC1206 JR-0730RL 30 SMD Resistor 3216 F 1/4W Yageo 16 R125 RC1206 JR-0730RL 30 SMD Resistor 3216 F 1/4W Yageo 17 R127 RC0603 JR-07180KL 180 k SMD Resistor 1608 F 1/16W Yageo 18 R128 RC1206 JR-070R22RL 0.22 SMD Resistor 3216 F 1/4W Yageo 19 R10 RC1206 JR-0747RL 47 SMD Resistor 3216 F 1/4W Yageo 20 R11 RC1206 JR-07120RL 120 SMD Resistor 3216 F 1/4W Yageo 21 R12 RC1206 JR-07620KL 620 k SMD Resistor 3216 F 1/4W Yageo 22 R13 RC0805 JR-071KL 1 k SMD Resistor 2012 F 1/8W Yageo 23 R14 RC1206 JR-070R22RL 0.22 SMD Resistor 3216 F 1/4W Yageo 24 R15 RC1206 JR-070R27RL 0.27 SMD Resistor 3216 F 1/4W Yageo 25 R16 RC0805 JR-0751RL 51 SMD Resistor 2012 F 1/4W Yageo 26 R17 RC0805 JR-0715RL 15 SMD Resistor 2012 F 1/4W Yageo 27 R18 RC0603 JR-07220KL 220 k SMD Resistor 1608 F 1/16W Yageo 28 R19 RC0603 JR-0727KL 27 k SMD Resistor 1608 F 1/16W Yageo 29 R20 RC0603 JR-0733KL 33 k SMD Resistor 1608 F 1/16W Yageo 30 R21 RC0603 JR-0782KL 82 k SMD Resistor 1608 F 1/16W Yageo 31 R22 RC0603 JR-0712KL 12 k SMD Resistor 1608 F 1/16W Yageo 32 R23 RC0603 JR-0791KL 91 k SMD Resistor 1608 F 1/16W Yageo 33 R27 RC0805 JR-0775KL 75 k SMD Resistor 2012 F 1/4W Yageo 34 R28 RC1206 JR-07620KL 620 k SMD Resistor 3216 F 1/4W Yageo 35 R29 RC0805 JR-0751RL 51 SMD Resistor 2012 F 1/4W Yageo 36 R30 RC0805 JR-07200KL 200 k SMD Resistor 2012 F 1/8W Yageo 37 R32 RC0805 JR-078R2L 8R2 SMD Resistor 2012 F 1/8W Yageo 38 R33 RC0603 JR-072KL 2 k SMD Resistor 1608 F 1/16W Yageo 2015 Fairchild Semiconductor Corporation 4 RD-552_FL7734 Rev. 1.0

Bill of Material (Continued) Item No. Part Reference Part Number Description Manufacturer 39 C111 MPE 400V683 MPE 68 nf/400 V 12.0 x 10.0 x 5.0 mm P 10 mm Sungho Electronics 40 C114 TF334*2*10B MTF 330 nf/400 V 12.0 x 13.0 x 5.5 mm P 10 mm CARLI 41 C116 TF154*2*10 MTF 150 nf / 400 V 12.5 x 9.5 x 5.0 mm P 10 mm CARLI 42 C117 TF684*2*10 MTF 680 nf / 400 V 17.5 x 12.5 x 5.5 mm P 15 mm CARLI 43 C119 C1206C561KCRACTU 560 pf / 500 V, SMD Capacitor 0805 Kemet 44 C120 KMG 470 μf / 63 V 470 μf / 63 V, Electrolytic Capacitor Samyoung 45 C121 KMG 470 μf / 63 V 470 μf / 63 V, Electrolytic Capacitor Samyoung 46 C122 KMG 470 μf / 63 V 470 μf / 63 V, Electrolytic Capacitor Samyoung 47 C4 C1206C103KDRACTU 10 nf / 1 kv SMD Capacitor 3216 Kemet 49 C6 GRM1885C1E822JA01# 8.2 nf / 16 V SMD Capacitor 1608 COG Murata 50 C8 KMG 22μF35V KMG Series 22 µf/35 V D5 x H11 105 C Electrolytic Capacitor Samyoung 51 C9 GRM2192C1H682JA01# 6.8 nf/50 V SMD Capacitor 2012 CH Murata 52 C10 C0603C100K8GACTU 10 pf/10 V SMD Capacitor 1608 NP0 Kemet 53 C13 GRM188B11A474KA61# 470 nf/10 V SMD Capacitor 1608 B Murata 54 C14 GRM1881X1E332JA01# 3.3 nf/10 V SMD Capacitor 1608 SL Murata 55 C15 GRM185D71A105KE36# 1 μf/10 V SMD Capacitor 1608 X7T Murata 56 C17 GRM188B11A474KA61# Y Cap 220 pf Samwha capacitor 57 C18 GRM1882C1H101JA01# 100 pf / 50 V SMD Capacitor CH Murata 58 C19 GRM1881X1E202JA01# 2 nf / 10 V SMD Capacitor 1608 SL Murata 59 LF1 B82733F 40 mh Common Inductor EPCOS 60 L1 R06102KT00 Radial Inductor 1.0 mh Size Φ10 mm x H16 mm P 8 mm BOSUNG 61 T1 PQ3220 Core PQ Core, 12-Pin Transformer TDK 62 D1 1N4007 1000 V / 1.0 A DO-41 Package General Purpose Diode Fairchild 63 D2 1N4007 1000 V / 1.0 A DO-41 Package General Purpose Diode Fairchild 63 D3 1N4148WS 100 V / 0.3 A SOD-323 Package General Purpose Diode Fairchild 64 D4 RS1M 1000 V / 1.0 A SMA Package Fast Recovery Diode Fairchild 65 D5 EGP30K 800 V / 3.0 A DO-201AD Package Fairchild 66 D56 RC0603 JR-070R0L 0 SMD Resistor 1608 F 1/16W Yageo 67 D6 RURP1560 600 V / 15 A, Ultrafast Rectifier Fairchild 68 ZD4 1N4749 24 V Zener Diode DO-41 Fairchild 69 ZD2 MM3Z6V2B 6.2 V Zener Diode SOD-323 Fairchild 70 ZD3 MM3Z15VB 15 V Zener Diode SOD-323 Fairchild 71 Q3 FCPF600N60Z N-Ch Mosfet 600 V / 7.4 A TO-220 Fairchild 72 Q3 FCPF600N60Z N-Ch Mosfet 600 V / 7.4 A TO-220 Fairchild 73 Q3 FCPF600N60Z N-Ch Mosfet 600 V/ 7.4 A TO-220 Fairchild 74 Q4 2N7002K N-Ch Mosfet 60 V / 0.3 A SOT-23 Fairchild 75 U FL7734MX Phase Cut Dimmable LED Driver IC Fairchild 2015 Fairchild Semiconductor Corporation 5 RD-552_FL7734 Rev. 1.0

4. Performance 16 15 14 13 12 11 10 9 8 7 6 5 108Vac 120Vac 132Vac Load CC = ± 1.8% 0 100 200 300 400 500 600 700 800 9001000110012001300140015001600 Figure 4. Output Current Regulation Data Plotted against Output Voltage Change Table 1. Output Current Regulation by Output Voltage Change (21-46 V) Input Voltage I OUT Minimum (ma) I OUT Maximum (ma) Tolerance (±%) 108 V AC [60 Hz] 1198 1238 1.64 120 V AC [60 Hz] 1199 1240 1.68 132 V AC [60 Hz] 1199 1241 1.72 2015 Fairchild Semiconductor Corporation 6 RD-552_FL7734 Rev. 1.0

100 90 80 70 14 LED 7 LED 60 50 100 110 120 130 140 Figure 5. System Efficiency Data Plotted against Line Variation Table 2. System Efficiency 21-46 V Nominal Load Input Voltage Input Power (W) Output Current (ma) Output Voltage (V) Output Power (W) Efficiency (%) 108 V AC [60 Hz] 65.7 1228 46 56.4 85.9 120 V AC [60 Hz] 64.9 1230 46 56.5 87.1 132 V AC [60 Hz] 64.2 1228 46 56.4 87.9 108 V AC [60 Hz] 64.3 1198 21 55.1 85.7 120 V AC [60 Hz] 63.9 1199 21 55.1 86.2 132 V AC [60 Hz] 63.7 1199 21 55.1 86.5 2015 Fairchild Semiconductor Corporation 7 RD-552_FL7734 Rev. 1.0

PF 1 0.98 0.96 0.94 0.92 0.9 THD 19.00% 17.00% 15.00% 13.00% 11.00% 9.00% 7.00% 7 LED PF 14 LED PF 7 LED THD 14 LED THD 0.88 5.00% 100 110 120 130 140 Figure 6. PF and THD Data Plotted against Line Variation 140 V Nominal Load Table 3. Power Factor and Input Current THD Input Voltage Output Current (ma) Output Voltage (V) Power Factor THD (%) 108 V AC [60 Hz] 1228 46 0.99 12.00 120 V AC [60 Hz] 1230 46 0.98 11.00 132 V AC [60 Hz] 1228 46 0.99 10.60 108 V AC [60 Hz] 1198 21 0.98 11.00 120 V AC [60 Hz] 1199 21 0.97 11.50 132 V AC [60 Hz] 1199 21 0.96 11.90 2015 Fairchild Semiconductor Corporation 8 RD-552_FL7734 Rev. 1.0

Output Current [ma] Low-line FL7734 driver (56 W with 14 LEDs) Output current without dimmer 1400 +10% 1200 7 LED www.fairchildsemi.com -25% 1000 800 9 LED 11 LED -70% 600 400 200 13 LED 14 LED 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 Dimmer Minimum Figure 7. Dimming Curve Dimmer Maximum Phase Angle [degree] Figure 7 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. Figure 8. NEMA SSL-7A Specification FL7734 dimming control method can meet NEMA SSL-7A specification. Figure 8 indicates the maximum and minimum dimmed output range as specified by NEMA SSL- 7A. 2015 Fairchild Semiconductor Corporation 9 RD-552_FL7734 Rev. 1.0

5. Electromagnetic Interference(EMI) Figure 9. Live Figure 10. Neutral 2015 Fairchild Semiconductor Corporation 10 RD-552_FL7734 Rev. 1.0

6. Related Resources FL7734- Product Folder Reference Design Disclaimer Fairchild Semiconductor Corporation ( Fairchild ) provides these reference design services as a benefit to our customers. Fairchild has made a good faith attempt to build for the specifications provided or needed by the customer. Fairchild provides this product as is and without recourse and MAKES NO WARRANTY, EXPRESSED, IMPLIED OR OTHERWISE, INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Customer agrees to do its own testing of any Fairchild reference designs in order to ensure design meets the customer needs. Neither Fairchild nor Customer shall be liable for incidental or consequential damages, including but not limited to, the cost of labor, requalifications, rework charges, delay, lost profits, or loss of goodwill arising out of the sale, installation or use of any Fairchild product. Subject to the limitations herein, Fairchild will defend any suit or proceeding brought against Customer if it is based on a claim that any product furnished hereunder constitutes an infringement of any intellectual property rights. Fairchild must be notified promptly in writing and given full and complete authority, information and assistance (at Fairchild s expense) for defense of the suit. Fairchild will pay damages and costs therein awarded against Customer but shall not be responsible for any compromise made without its consent. In no event shall Fairchild s liability for all damages and costs (including the costs of the defense by Fairchild) exceed the contractual value of the products or services that are the subject of the lawsuit. In providing such defense, or in the event that such product is held to constitute infringement and the use of the product is enjoined, Fairchild, in its discretion, shall procure the right to continue using such product, or modify it so that it becomes noninfringing, or remove it and grant Customer a credit for the depreciated value thereof. Fairchild s indemnity does not extend to claims of infringement arising from Fairchild s compliance with Customer s design, specifications and/or instructions, or the use of any product in combination with other products or in connection with a manufacturing or other process. The foregoing remedy is exclusive and constitutes Fairchild s sole obligation for any claim of intellectual property infringement and Fairchild makes no warranty that products sold hereunder will not infringe any intellectual property rights. All solutions, designs, schematics, drawings, boards or other information provided by Fairchild to Customer are confidential and provided for Customer s own use. Customer may not share any Fairchild materials with other semiconductor suppliers. 2015 Fairchild Semiconductor Corporation 11 RD-552_FL7734 Rev. 1.0