Photoflash Flyback Transformer EPC3205G-X & EPC3205G-X-LF ELECTRONICS INC. • Used as Flyback Transformer in High Voltage Photoflash Capacitor Charger • Designed for use with Linear Technology Chip • Add “-LF” after part number for Lead Free • Operating Temperature : -40°C to +85°C • UL 94V-0 Recognized Components • UL 1446 Class B Insulation System • Isolation : 500 Vrms Electrical Parameters @ 25° C PCA Part Number Voltage (Vdc) Chipset EPC3205G-1A(-LF) EPC3205G-2(-LF) { LT3468 LT3468 LT3468-2 LT3468 LT3468-2 LT3468-1 LT3420 LT3420 LT3420-1 EPC3205G-3(-LF) EPC3205G-4(-LF) EPC3205G-5(-LF) EPC3205G-6(-LF) EPC3205G-7(-LF) EPC3205G-8(-LF) Primary Peak Current (A Max.) V in V out 2.5-5.0 2.5-5.0 2.5-5.0 2.5-4.0 2.5-5.0 2.5-5.0 1.8-5.0 1.8-6.0 1.8-5.0 320 320 320 320 320 320 320 320 320 1.4 1.4 1.0 1.4 1.0 0.7 1.4 1.4 1.0 1 Leakage Inductance (µH Typ.) Pri:Sec @ 100 KHz, 0.1 Vrms 20.0 12.3 12.3 10.0 10.0 15.0 25.0 24.0 15.0 @ 100 KHz, 0.1 Vrms 0.200 0.130 0.130 0.200 0.300 0.300 0.130 0.080 0.100 4 Flyback Transformer T1 VBAT 1.8V-10V C1 4.7µF Sec. 3 T1 Pri. Pri. 4 B/1 A/1 A/1 E/2 E/2 E/2 B/1 D/3 C/1 D1 VCC 2.5V-10V C2 4.7µF SEC 7 Sec. C4 + 220µF 330V Photoflash Capacitor LT3420 Charge 8 Pri. Sec. 3,4 25 21 21 25 37 37 18 18 18 Pri. 2 3 6 4 VBAT RFB SW Schematic 3 T1 0.300 0.230 0.230 0.250 0.300 0.300 0.160 0.160 0.230 Sec. R2 51.1k Sec. 5,6 Sec. Trigger Transformer T2 6 2 Pri. Package/ Schematic 320V Schematic 2 1 DCR (Ω Max.) LT3420 320V Photoflash Capacitor Charging Circuit Pri. 2 Primary OCL @ 0Adc (µH ± 15%) 1:10.2 1:10.2 1:10.2 1:10.2 1:10.2 1:10.2 1:12 1:12 1:10.2 Schematic 1 T1 Turns Ratio Done 9 RREF 8 CT 10 1 1 Flash GND 5 C3 0.1µF Notes : Bold Lines Indicate High Current Paths EPC3205G-X EPC3205G-X-LF 1. Assembly Process (Solder Composition) SnPb Pb-Free 2. Peak Solder Rating 225°C 260°C 1 (Unlimited, ≤30°C/60%RH) 1 (Unlimited, ≤30°C/60%RH) (per IPC/JEDEC-J-STD-020C) 3. Moisture Sensitive Levels (MSL) (per IPC/JEDEC-J-STD-020C) 4. Weight 5. Packaging Information (Tube) TBD grams TBD grams TBD pcs / tube TBD pcs / tube Package Drawings Next Page Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25 PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 Product performance is limited to specified parameters. Data is subject to change without prior notice. CSC3205G-X & -LF Rev. 8 06/13/12 FT TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com Photoflash Flyback Transformer EPC3205G-X & EPC3205G-X-LF ELECTRONICS INC. Package A Recommended Layout 0.311 (7.90) 0.383 (9.72) 4 1 Pin 1 I.D. Marking : PCA 2 EPC3205G-2(-LF) D.C. 0.311 (7.90) 0.238 (6.04) 3 0.138 Max. (3.50) Package B 0.350 (8.90) 1 Pin 1 I.D. Marking : PCA 2 EPC3205G-6(-LF) D.C. Package C Recommended Layout 0.311 (7.90) 0.422 (10.72) 4 0.350 (8.90) 1 Pin 1 I.D. Marking : PCA 2 EPC3205G-8(-LF) D.C. 0.277 (7.04) 3 0.205 Max. (5.20) Recommended Layout 0.383 (9.72) 4 0.311 (7.90) 0.238 (6.04) 3 0.193 Max. (4.90) Package D Package E 0.319 Typ. (8.10) Pin 1 I.D. 1 0.146 (3.70) 0.401 Typ. (10.20) 0.490 0.020 (12.45) 5 (0.50) 1 8 0.236 (6.00) 4 0.026 (0.65) 0.453 (11.50) 0.218 (5.54) 0.073 (1.85) 0.079 (2.00) Side Marking : 0.012 PCA EPC3205G-7(-LF) (0.30) D.C. 0°-8° 0°-8° 4 Pin 1 I.D. Side Marking D.C. PCA EPC 0.303 (7.70) 0.008 (0.20) Pad Layout 0.358 (9.10) 3 Side Marking : 3205G-5(-LF) 0.193 (4.90) 0.047 (1.20) 0.079 (2.00) 0.067 (1.70) 0.024 0.218 (5.54) 6 (0.60) 0.010 (0.25) .205 (5.20) 0.006 (0.15) 0.342 (8.70) Pad Layout 0.059 (1.50) 0.063 (1.60) 0.073 (1.85) Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25 PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 Product performance is limited to specified parameters. Data is subject to change without prior notice. CSC3205G-X & -LF Rev. 8 06/13/12 FT TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com