Switch Mode Transformers EP7 Platform SMD Push Pull Converter Transformer Reinforced insulation for isolated power supply driver Compatible with MAXIM MAX253 to power RS-485/RS232 transceiver 8mm creepage, 4000V Hi-pot UL and TUV certification UL class F insulation System compliant 4 Electrical Specifications 25C - Operating Temperature -40C to +125C Inductance 2, 3 1 Part (1-3) DCR (1-3) MAX (1-3) Turns Isolated Voltage Number (H 45%) ( MAX) (V-sec) Ratio (Vrms) PH9185.011NL 750.0 0.50 66.0 1:1 PH9185.012NL 450.0 0.40 52.0 1:2 PH9185.013NL 200.0 0.35 36.0 1:3 PH9185.021NL 880.0 0.56 74.0 2:1 4000.0 PH9185.034NL 750.0 0.50 66.0 3:4 PH9185.038NL 310.0 0.35 44.0 3:8 PH9185.043NL 1260.0 0.70 89.0 4:3 PH9185.083NL 560.0 0.45 59.0 8:3 Notes: 1. The maximum volt-usec rating limits the peak flux density to 3600 gauss when used in and reel specification EIA481. bi-polar drive application with 200KHz. For unipolar drive applications or a bi-polar drive 3. The NL suffix indicates an RoHS-compliant part number. with 350kHz, a maximum volt-usec could be 60% of the listed value. 4. The temperature of the component (ambient plus the temperature rise) must be 2. Optional Tape & Reel packing can be ordered by adding a T suffix to the part number within the stated operating temperature range. (i.e. PH9185.012NL becomes PH9185.012NLT). Pulse complies to industry standard tape Mechanical Schematic PH9185.XXXXNL Weight .............................2.6grams Tape & Reel ........................150/reel Tray ......................................80/tray Inches Dimensions: mm Unless otherwise specified, .010 all tolerances are 0,25 USA 858 674 8100 Germany 49 7032 7806 0 Singapore 65 6287 8998 Shanghai 86 21 62787060 China 86 755 33966678 Taiwan 886 3 4356768 1 pulseelectronics.com P708A (7/12)Switching Mode Transformers EP7 Platform SMD Application PH9185NL 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. V IN PH9185 V CC D1 VOUT 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. This transformer design has been certified by UL to comply with U L60050-1 2 nd edition, and CAN/CSA C22.2 NO. 60950-1-07 2nd edition and by TUV to comply with EN61558-1 and EN61558-2-16 with reinforced insulation for a working voltage up to 400V 8mm creepage and 4000Vrms isolation voltage is guaranteed to meet this requirement. The design also complies with the Pulses class F insulation system. MAXIM is a registered trademark of Maxim Integrated Products. For More Information Pulse Worldwide Pulse Europe Pulse China Headquarters Pulse North China Pulse South Asia Pulse North Asia Headquarters Einsteinstrasse 1 B402, Shenzhen Academy of Room 2704/2705 135 Joo Seng Road 3F, No. 198 12220 World Trade Drive D-71083 Herren- Aerospace Technol- Super Ocean Finance 03-02 Zhongyuan Road San Diego, CA berg ogy Bldg. Ctr. PM Industrial Bldg. Zhongli City 92128 Germany 10th Kejinan Road 2067 Yan An Road Singapore 368363 Taoyuan County 320 U.S.A. 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, 2011. Pulse Electronics, Inc. All rights reserved. 2 pulseelectronics.com P708.A (7/12)