DC/DC Converter Transformer 1 : 1.35 : 1.35 + 2% Turns Ratio (1-9 : 2-10 : 5-6) Parameter Min. Inductance (1-3) 405 Typ. Leakage Inductance Interwinding Capacitance Max. Units 752 µH 0.35 µH 25 pF DC Resistance (1-3) 0.25 Ω DC Resistance (4-5) or (5-6) 0.650 Ω Hi-Pot Primary to Secondary Insulation Resistance 500 DC/DC converter for use with LinearTechnology LTC 1535 isolated RS485 transceiver. Materials used in construction of this component meet or exceed UL Class B and can be operated up to 130 oC VRMS 1000 MΩ at 500 VDC. 0O to + 85OC. Temperature Range: 1. Tested at 10 kHz - 100 mV SCHEMATIC DIAGRAM 1 6 Dimensions in inches (mm) 5 4 3 .370 (9.40) MAX. .525 (13.34) .375 (9.53) MAX. 6 .375 (9.53) MAX. .098 .028 (2.50) (0.70) 5 .025 (0.64) .100 (2.54) TYP. 1 Suggested Pad Layout 2 .340 (8.64) .505 (12.83) .490 (12.45) .050 (1.27) TYP. 3 4 .075 (1.905) TYP. RHOMBUS P/N: T-1479 CUST P/N: DATE: 01/31/02 Rhombus Industries Inc. Transformers & Magnetic Products www.rhombus-ind.com NAME: SHEET: 1 OF 1 15801 Chemical Lane, Huntington Beach, CA 92649-1595 Phone: (714) 898-0960 FAX: (714) 896-0971