Isolation Power Transformers Toroid Platform SMD Push Pull Converter Transformer Compatible with MAXIM™ MAX253 to power RS-485/RS232 transceiver and other communication interfaces 2.5KVrms isolation Compact and cost effective industrial design 4 Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C Part 2, 3, 4 Number Inductance (1-3) (µH ±35%) Leakage Inductance (1-3) with Capacitance (4-6) shorted (1, 2, 3) to (4, 5, 6) (µH MAX) (pF MAX) DCR (1-3) (Ω MAX) DCR (4-6) (Ω MAX) MAX (1-3)1 (V-µsec Max) Turns Ratio (1:3) (6:4) PH9085.011NL 1020 0.8 30 0.60 0.65 11 1CT : 1CT PH9085.012NL 1020 0.6 40 0.85 1.60 11 1CT : 2CT PH9085.021NL 1160 1.6 20 0.60 0.35 11.8 2CT : 1CT PH9085.034NL 1020 0.6 40 0.60 0.75 11 3CT : 4CT PH9085.035NL 1020 0.6 40 0.80 1.20 11 3CT : 5CT PH9085.038NL 1020 0.7 40 0.85 2.00 11 3CT : 8CT PH9085.043NL 1160 0.8 30 0.60 0.50 11.8 4CT : 3CT PH9085.083NL 1160 2.0 15 0.60 0.30 11.8 8CT : 3CT PH9085.089NL 1160 0.6 40 0.60 0.70 11.8 8CT :9CT Notes: 1. The maximum volt-usec rating limits the peak flux density to 3600 gauss when used in bi-polar drive application with 200KHz. For unipolar drive applications or a bi-polar drive with 350kHz, a maximum volt-usec could be 60% of the listed value. For Push-Pull topology, where the voltage is applied across half the primary winding turns, the maximum volts-use needs to be derated by 50%. Schematic 8.10 MAX 5 6 PULSE PH9085.XXXNL DATE CODE CoO 7.10 MAX 4 2500 2. Optional Tape & Reel packing can be ordered by adding a “T” suffix to the part number (i.e. PH9085.012NL becomes PH9085.012NLT). Pulse complies to industry standard tape and reel specification EIA481. 3. The “NL” suffix indicates an RoHS-compliant part number. Mechanical PH9085.XXXXNL Isolated Voltage (Vrms) 1.80 1 6 2 5 3 4 3 2 5.08 2.54 1 6.4 Weight ...........................0.365grams Tape & Reel ........................700/reel Tray ......................................55/tray 12 5.08 MAX d (8.30) 0.10 6 SURFACES 0.50 ±0.10 9.50 MAX USA 858 674 8100 Germany 49 7032 7806 0 1 Singapore 65 6287 8998 pulseelectronics.com Dimensions: Inches mm Unless otherwise specified, all tolerances are ± .010 0,25 Shanghai 86 21 62787060 China 86 755 33966678 Taiwan 886 3 4356768 P759.B (08/15) Isolation Power Transformers Toroid Platform SMD Application PH9085NL is a series of high isolation power supply transformer drivers. Intended to operate in a fixed duty cycle Push Pull topology, it is a part of a low cost solution for delivering lower power (up to 3W) from a low voltage source. A typical implementation would be an isolated RS-485/RS-232 power supply driver circuit, the design is compatible with the MAXIM™ MAX253 IC. A schematic diagram for the Push Pull converter topology is given below. VIN PH9085 VCC D1 V OUT DRIVER IC D2 GND For a fixed 50% duty cycle mode of operation, the output voltage is simply determined by the input voltage and turns ratio. So, with the available turns ratios, a variety of output voltages can be selected. MAXIM is a registered trademark of Maxim Integrated Products. For More Information Pulse Worldwide Headquarters 12220 World Trade Drive San Diego, CA 92128 U.S.A. Pulse Europe Einsteinstrasse 1 D-71083 Herrenberg Germany Pulse China Headquarters Pulse North China Pulse South Asia Pulse North Asia B402, Shenzhen Academy of Room 2704/2705 135 Joo Seng Road 3F, No. 198 Aerospace TechnolSuper Ocean Finance #03-02 Zhongyuan Road ogy Bldg. Ctr. PM Industrial Bldg. Zhongli City 10th Kejinan Road 2067 Yan An Road Singapore 368363 Taoyuan County 320 High-Tech Zone West Taiwan R. O. C. Nanshan District Shanghai 200336 Tel: 886 3 4356768 Shenzen, PR China China Tel: 65 6287 8998 Fax: 886 3 4356823 (Pulse) Tel: 858 674 8100 Tel: 49 7032 78060 518057 Fax: 65 6287 8998 Fax: 886 3 4356820 (FRE) Fax: 858 674 8262 Fax: 49 7032 7806 135 Tel: 86 755 33966678 Tel: 86 21 62787060 Fax: 86 755 33966700 Fax: 86 2162786973 Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. © Copyright, 2015. Pulse Electronics, Inc. All rights reserved. 2 pulseelectronics.com P759.B (08/15)