www.fairchildsemi.com Fairchild Reference Design The following user guide supports the demonstration kit for the FL7732. It should be used in conjunction with the FL7732 datasheet as well as Fairchild’s application notes and technical support team. Please visit Fairchild’s website at www.fairchildsemi.com Application Fairchild Device Input Voltage Range Output Power Output Voltage (Rated Current) LED Bulb FL7732 90-265 VAC 16.8 W 24 V (0.7 A) Key Features Cost-Effective Solution: No Input Bulk Capacitor or Feedback Circuitry Power Factor Correction (PFC) Accurate Constant-Current (CC) Control Linear Frequency Control Improves Efficiency and Simplifies Design Constant Current Regulation vs. Output Voltage Change (11~28 V): <±2.88% Constant Current Regulation vs. line voltage change (90~265 VAC): <±2.94% Output-Open & Short-Circuit Protection with Auto Restart System Efficiency Up to 89% PF and THD at Nominal Voltages (120 ~ 230 VAC): PF (>0.95), THD (<18%) © 2012 Fairchild Semiconductor Corporation 1 RD-L026_FL7732 • Rev. 1.1.0 www.fairchildsemi.com 1. Schematics Figure 1. © 2012 Fairchild Semiconductor Corporation Schematic 2 RD-L026_FL7732 • Rev. 1.1.0 www.fairchildsemi.com 2. Bill of Material Item Part No. Reference Part number Qty Description Manufacturer 1 BD1 DF06S 1 1.5 A/600V Bridge Diode Fairchild Semiconductor 2 CF1 MPX AC275V 104K 1 104/AC275V X-Capacitor Carli 3 CF2 MPX AC275V 473K 1 473/AC275V X-Capacitor Carli 4 CS1 C1206C103KDRACTU 1 103/1 kV SMD Capacitor 3216 Kemet 5 CY1 SCFz2E472M10BW 1 472/250 V Y-Capacitor Samwha 6 Co1, Co2 KMG 470 µF/35 V 2 470 µF/35 V Electrolytic Capacitor Samyoung 7 C1 MPE 630V104K 14S 1 104/630 V MPE Film Capacitor Sungho 8 C2 KMG 22 µF/50 V 1 22 µF/35 V Electrolytic Capacitor Samyoung 9 C3 C0805C104K5RACTU 1 104/50 V SMD Capacitor 2012 Kemet 10 C4 C0805C200J5GACTU 1 200/50 V SMD Capacitor 2012 Kemet 11 C5 C0805C225Z3VACTU 1 225/25 V SMD Capacitor 2012 Kemet 12 DS1 RS1M 1 1000 V/1 A Ultra-Fast Recovery Diode Fairchild Semiconductor 13 Do1 ES3D 1 200 V/3 A, Fast Rectifier Fairchild Semiconductor 14 D1 1N4003 1 200 V/1 A, General Purpose Rectifier Fairchild Semiconductor 15 F1 SS-5-1A 1 250 V/1 A Fuse Bussmann 16 LF1 R10402KT00 1 4 mH Inductor, 10Ø Bosung 17 MOV1 SVC 471 D-07A 1 Metal Oxide Varistor Samwha 18 Q1 FDD5N60NZ 1 600 V/4 A, N-Channel MOSFET Fairchild Semiconductor 19 RG1, R6 RC1206JR-0710L 2 10 Ω SMD Resistor 3216 Yageo 20 RS1, RS2 RC1206JR-07100KL 2 100 kΩ SMD Resistor 3216 Yageo 21 Rcs1, Rcs2 RC1206JR-071RL 2 1 Ω SMD Resistor 3216 Yageo 22 Rcs3 RC1206JR-072R4L 1 2.4 Ω SMD Resistor 3216 Yageo 23 Ro1 RC1206JR-0720KL 1 20 KΩ SMD Resistor 3216 Yageo 24 R4 RC1206JR-07150KL 1 150 KΩ SMD Resistor 3216 Yageo 25 R1, R2, R3 RC1206JR-0768KL 3 68 KΩ SMD Resistor 3216 Yageo 26 R5 RC1206JR-0724KL 1 24 KΩ SMD Resistor 3216 Yageo 27 T1 RM8 Core 1 12-Pin, Transformer TDK 28 U1 FL7732M_F116 1 Main PSR Controller Fairchild Semiconductor © 2012 Fairchild Semiconductor Corporation 3 RD-L026_FL7732 • Rev. 1.1.0 www.fairchildsemi.com 3. Transformer Figure 2. Transformer Bobbin Structure and Pin Configuration Figure 3. Transformer Winding Structure Table 1. Winding Specifications No Winding Pin (S → F) Wire Turns Winding Method 1 NP1 12 1 0.25φ 30 Ts Solenoid Winding 2 3 Insulation : Polyester Tape t = 0.025 mm, 3-Layer NS 4 5 NP2 20 Ts Solenoid Winding 12 0.25φ 30 Ts Solenoid Winding Insulation : Polyester Tape t = 0.025 mm, 3-Layer NA 8 Table 2. 0.5φ (TIW) Insulation : Polyester Tape t = 0.025 mm, 3-Layer 6 7 78 65 0.25φ 15 Ts Solenoid Winding Insulation : Polyester Tape t = 0.025 mm, 3-Layer Electrical Characteristics Pin Specification Remark Inductance 12–2 750 µH ±10% 60 kHz, 1 V Leakage 12–2 6 µH 60 kHz, 1 V Short All Output Pins © 2012 Fairchild Semiconductor Corporation 4 RD-L026_FL7732 • Rev. 1.1.0 www.fairchildsemi.com 4. Performance Figure 4. Table 3. Constant Current Regulation – Measured by E-Load [CR Mode] Constant Current Regulation by Output Voltage Change (11~28 V) Input Voltage Min. Current [mA] Max. Current [mA] Tolerance 90 VAC [60 Hz] 656 682 ±1.94% 120 VAC [60 Hz] 657 696 ±2.88% 140 VAC [60 Hz] 679 696 ±1.24% 180 VAC [50 Hz] 685 703 ±1.30% 230 VAC [50 Hz] 675 696 ±1.53% 265 VAC [50 Hz] 666 681 ±1.11% Table 4. Constant Current Regulation by Line Voltage Change (90~265 VAC) Output Voltage 90 VAC [60 Hz] 120 VAC [60 Hz] 140 VAC [60 Hz] 180 VAC [50 Hz] 220 VAC [50 Hz] 265 VAC [50 Hz] Tolerance 26 V 678 mA 660 mA 681 mA 700 mA 690 mA 678 mA ±2.94% 24 V 676 mA 659 mA 679 mA 697 mA 684 mA 678 mA ±2.80% 22 V 673 mA 657 mA 683 mA 694 mA 692 mA 681 mA ±2.74% © 2012 Fairchild Semiconductor Corporation 5 RD-L026_FL7732 • Rev. 1.1.0 www.fairchildsemi.com Eff. [%] Figure 5. Table 5. System Efficiency (7-LED) System Efficiency Input Voltage Input Power [W] Output Current [A] Output Voltage [V] Output Power [W] Efficiency 90 VAC [60 Hz] 18.91 0.678 24.10 16.35 86.45% 120 VAC [60 Hz] 18.02 0.663 24.04 15.94 88.45% 140 VAC [60 Hz] 18.78 0.687 24.27 16.67 88.76% 180 VAC [50 Hz] 19.31 0.704 24.43 17.19 89.03% 220 VAC [50 Hz] 18.99 0.693 24.34 16.86 88.77% 265 VAC [50 Hz] 19.05 0.689 24.28 16.74 87.87% Figure 6. © 2012 Fairchild Semiconductor Corporation Power Factor (PF) & Total Harmonic Distortion (THD) 6 RD-L026_FL7732 • Rev. 1.1.0 www.fairchildsemi.com Table 6. Power Factor (PF) & Total Harmonic Distortion (THD) Input Voltage Output Current Output Voltage Power Factor THD 90 VAC [60 Hz] 0.678 A 24.10 V 0.98 15.29% 120 VAC [60 Hz] 0.663 A 24.04 V 0.99 14.27% 140 VAC [60 Hz] 0.687 A 24.27 V 0.98 13.61% 180 VAC [50 Hz] 0.704 A 24.43 V 0.98 14.12% 220 VAC [50 Hz] 0.693 A 24.34 V 0.96 17.69% 265 VAC [50 Hz] 0.689 A 24.28 V 0.94 19.01% 5. Related Resources FL7732 — Single-Stage FPC Primary-Side-Regulation Offline LED Driver http://www.fairchildsemi.com/referencedesign/ 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. 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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. © 2012 Fairchild Semiconductor Corporation 7 RD-L026_FL7732 • Rev. 1.1.0
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