September 1, 2009 SMPS FLYBACK TRANSFORMER SM79307 Electrical Specifications @ 25°C Designed for use with Broadcom BCM3380 – DOCSIS 3.0 Cable Modem Ls (1-8) @ 1Vrms, 100kHz 5.0µH ±0.5µH DCR (1-8) 0.012Ω Max. DCR (4-5) = (3-6) 0.55Ω Max. Polarity: 1, 3, 4 Same Phase Turns Ratio (1-8) : (4-5) : (3-6) 1:4:4 ±3% Hipot (1-8) to (4-5) 600VAC Hipot (1-8) to Core 600VAC Mechanical Outline Recommended PCB Layout 10.2 Max 7.8 Max 9.7 Max 2.5 +/-0.05 0.75 x 0.25 +/-0.13 9.0 Max Laser Marking 4 Notes: 1. 2. 3. 4. 5. d 3 DATE PRC 2 8 SM79307 1 Schematic 6 7 5 All dimensions are millimeters Unless otherwise specified tolerance ±0.25 Coplanarity: 0.102 Terminal finish is compliant to RoHS requirements. Solder in accordance with J-STD-020D Tape and Reel Quantity 250 pcs/reel DATATRONIC: 28151 Highway 74, Romoland, CA 92585 Tel 951-928-7700, FAX 951-928-7701 Email: [email protected] 499 King’s Road, Hong Kong Tel: (852) 2562 3858, (852) 2564 8477 Fax: (852) 2565 7214, (852) 2563 1290 All specifications are subject to change without notice.