Isolation Power Transformers Toroid Platform SMD Push Pull Converter Transformer Functional insulation for isolated power supply driver 2.5KVrms isolation (380Vrms continuous) Electrical Specifications 25C - Operating Temperature -40C to +125C Inductance Leakage Inductance Capacitance 1 2 Part DCR (1-3) DCR (4-6) ET MAX (1-3) Turns Ratio Isolated Voltage (1-3) (1-3) with (4-6) shorted (1, 2, 3) to (4, 5, 6) Number ( MAX) ( MAX) (V-sec Max) (1:3) (6:4) (Vrms) (H 35%) (H MAX) (pF MAX) PH9085.011NL 1020 0.8 30 0.60 0.65 22 1CT : 1CT PH9085.012NL 1020 0.6 40 0.85 1.60 22 1CT : 2CT PH9085.021NL 1160 1.6 20 0.60 0.35 23.6 2CT : 1CT PH9085.034NL 1020 0.6 40 0.60 0.75 22 3CT : 4CT PH9085.035NL 1020 0.6 40 0.80 1.20 22 3CT : 5CT 2500 PH9085.038NL 1020 0.7 40 0.85 2.00 22 3CT : 8CT PH9085.043NL 1160 0.8 30 0.60 0.50 23.6 4CT : 3CT PH9085.083NL 1160 2.0 15 0.60 0.30 23.6 8CT : 3CT PH9085.089NL 1160 0.6 40 0.60 0.70 23.6 8CT :9CT Notes: 2.43 2.5 1. The ET Max is calculated to limit the core loss and temperature rise at 100KHz based on a Core Loss (W) = 7.70E-13 * (Frequency in kHz) * (210 * ET/ET Max ) bipolar flux swing of 210mT Peak. Where ET is the applied Volt Second, ET Max is the rated Volt Second for 210mT flux 2. For Push-Pull topology, where the voltage is applied across half the primary winding turns, swing the ET needs to be derated by 50% for the same flux swing. C. To calculate temperature rise, use the following formula: Temperature Rise (C) 3. The applied ET may need to be further derated for higher frequencies based on the = 340 * (Core Loss(W) + Copper Loss (W)) temperature rise which results from the core and copper losses 4. The AEC-Q200 temperature and humidity operational life testing was completed using a A. To calculate total copper loss (W), use the following formula: dielectric strength test of 2750Vdc. 2 2 Copper Loss (W) = Irms Primary * DCR Primary + Irms Secondary *DCR Secondary 5. Continuous isolation voltage confirmed by 125C/1000hrs accelerated aging with the bias B. To calculate total core loss (W), use the following formula: voltage applied between primary and secondary windings. Mechanical Schematic PH9085.XXXNL Weight ...........................0.365grams Tape & Reel ........................700/reel Tray ......................................55/tray Inches Dimensions: mm Unless otherwise specified, .010 all tolerances are 0,25 Isolation Power Transformers Toroid Platform SMD Application PH9085.XXXNL 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 2W) 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 PH9085 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. 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 Pulse Electronics GmbH Pulse Electronics (ShenZhen) CO., LTD Room 2704/2705 3 Fraser Street 1F., No.111 Xiyuan Rd 15255 Innovation Drive Ste 100 Am Rottland 12 D708, Shenzhen Academy of Super Ocean Finance Ctr. 0428 DUO Tower Zhongli City San Diego, CA 92128 58540 Meinerzhagen Aerospace Technology, 2067 Yan An Road West Singapore 189352 Taoyuan City 32057 U.S.A. Germany The 10th Keji South Road, Shanghai 200336 Taiwan (R.O.C) Nanshan District, Shenzhen, China P.R. China 518057 Tel: 858 674 8100 Tel: 49 2354 777 100 Tel: 86 755 33966678 Tel: 86 21 62787060 Tel: 65 6287 8998 Tel: 886 3 4356768 Fax: 858 674 8262 Fax: 49 2354 777 168 Fax: 86 755 33966700 Fax: 86 2162786973 Fax: 65 6280 0080 Fax: 886 3 4356820 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, 2018. Pulse Electronics, Inc. All rights reserved.