Web Sample Tools & Support Document 752R-1 page & buy software & FAQ For Step-Up, Resonant Coupled Inductors LPR6235 & Flyback Applications Halogen Can be used as step-up or flyback transformers in DC-DC Free converters or as autotransformers Perfect for low voltage step-up in energy harvesting applications Selected by Linear Technology for the LTC3108 and LTC3109 Ultralow Voltage Step-Up Converter and Power Managers AEC + Q200 85C 300 Vrms, one minute isolation (hipot) between windings 3.5 mm high and 6 mm square Excellent coupling coefficient (k = 0.95) ideal for use in a va - riety of applications such as flyback transformers and step-up pulse transformers. High Isat and low DCR ratings provide high efficiency and excellent current handling in a rugged, low cost design Custom inductance values and turn ratios are available upon request DCR max C Primary (L1) SRF D 2 (Ohms) 3 4 Part Turns inductance typ Isat V V IN OUT 1 number ratio 20% (H) L1 L2 (kHz) (A) D Sync LPR6235-253LMR 1 : 10 25 0.74 13.7 1300 1.3 Rectifier L1 L2 C LPR6235-253PMR 1 : 20 25 0.20 72 580 0.7 C LPR6235-123QMR 1 : 50 12.5 0.085 200 360 0.9 LPR6235-752RMR 1 : 90 7.5 0.085 285 257 1.6 LPR6235-752SMR 1 : 100 7.5 0.085 340 230 1.6 1. When ordering, please specify packaging code: LPR6235-253PMRC Packaging: C = 7 machine-ready reel. EIA-481 embossed plastic tape (350 parts per full reel). Quantities less than full reel Typical Step-Up Converter available: in tape (not machine ready) or with leader and trailer ( 25 charge). B = In an effort to simplify our part numbering system, ++ Coilcraft is eliminating the need for multiple packaging D codes. When ordering, simply change the last letter of your part number from B to C. C V L1 L2 OUT D = 13 machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked (1500 parts per full reel). V IN C 2. Inductance is measured at 100 kHz, 0.1 Vrms, 0 Adc for -253LMR. All other values are measured at 10 kHz, 0.1 Vrms, 0 Adc on an Agilent/HP 4284A PWM LCR meter or equivalent. 3. SRF measured using an Agilent/HP 4191A or equivalent. 4. DC current applied to L1, at which the inductance drops 10% from its value without current. Typical Flyback Converter 5. Electrical specifications at 25C. Refer to Doc 362 Soldering Surface Mount Components before soldering. Document 752R-1 Revised 12/13/21 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2021 This product may not be used in medical or high Taiwan +886-2-2264 3646 sales coilcraft.com.tw risk applications without prior Coilcraft approval. China +86-21-6218 8074 sales coilcraft.com.cn Specification subject to change without notice. Singapore + 65-6484 8412 sales coilcraft.com.sg Please check web site for latest information.Document 752R-2 Step-Up / Flyback Transformers LPR6235 Core material Ferrite Weight 460 480 mg Environmental RoHS compliant, halogen free Terminations RoHS compliant matte tin over nickel over silver. Halogen Other terminations available at additional cost. Free Ambient temperature 40C to +85C Storage temperature Component: 40C to +125C. Tape and reel packaging: 40C to +80C Winding to winding isolation 300 Vrms AEC + Resistance to soldering heat Max three 40 second reflows at Q200 85C +260C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30C / 85% relative humidity) Packaging 350/7 reel 1500/13 reel Plastic tape: 16 mm wide, 0.3 mm thick, 12 mm pocket spacing, 3.68 mm pocket depth Recommended pick and place nozzle OD: 6.2 mm ID: 3.1 mm PCB washing Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787 PCB Washing.pdf. inches Dimensions are in mm Document 752R-2 Revised 12/13/21 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2021 This product may not be used in medical or high Taiwan +886-2-2264 3646 sales coilcraft.com.tw risk applications without prior Coilcraft approval. China +86-21-6218 8074 sales coilcraft.com.cn Specification subject to change without notice. Singapore + 65-6484 8412 sales coilcraft.com.sg Please check web site for latest information.