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| Document 752-1 Miniature Step-Up / Flyback Transformers * Can be used as step-up or flyback transformers in DC-DC converters or as autotransformers * Perfect for low voltage step-up in energy harvesting applications These shielded parts are only 3.5 mm high and 6 mm square. The excellent coupling coefficient (k = 0.95) makes them ideal for use in a variety of applications, such as flyback converters and step-up pulse transformer applications. The high Isat and low DCR ratings of these low profile parts provide high efficiency and excellent current handling in a rugged, low cost design. Custom inductance values and turn ratios are available upon request. + D + L1 L2 C VOUT Part number1 LPR6235-253PML_ LPR6235-123QML_ LPR6235-752RML_ LPR6235-752SML_ Primary (L1) DCR max Turns inductance2 (Ohms) ratio 20% (H) L1 L2 1 : 20 1 : 50 1 : 90 1 : 100 25 12.5 7.5 7.5 0.20 0.080 0.085 0.085 58 200 267 305 SRF typ3 Isat4 (MHz) (A) 580 382 257 244 0.7 0.9 1.6 1.6 VIN C PWM - - Typical Step-Up / Flyback Converter 1. When ordering, please specify packaging code: LPR6235-253PMLC Packaging: C = 7 machine-ready reel. EIA-481 embossed plastic tape (350 parts per full reel). B = Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead. D = 13 machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked (1500 parts per full reel). 2. Inductance is measured at 100 kHz, 0.1 Vrms, 0 Adc on an Agilent/HP 4284A 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. 5. Electrical specifications at 25C. Refer to Doc 362 "Soldering Surface Mount Components" before soldering. Core material Ferrite Weight 460 - 480 mg Terminations RoHS compliant silver-palladium-platinum-glass frit. Other terminations available at additional cost. Ambient temperature -40C to +85C with Irms current, +85C to +125C with derated current Storage temperature Component: -40C to +125C. Packaging: -40C to +80C Winding to winding isolation 100 V Resistance to soldering heat Max three 40 second reflows at +260C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30C / 85% relative humidity) Mean Time Between Failures (MTBF) 26,315,789 hours Failures in Time (FIT) 38 per one billion hours Packaging 350/7reel; 1500/13 reel Plastic tape: 12 mm wide, 0.3 mm thick, 8 mm pocket spacing, 3.68 mm pocket depth Recommended pick and place nozzle OD: 6.2 mm; ID: 3.1 mm PCB washing Only pure water or alcohol recommended Specifications subject to change without notice. Please check our website for latest information. Document 752-1 Revised 10/01/09 (c) Coilcraft, Inc. 2009 Document 752-2 Step-Up / Flyback Transformers - LPR6235 Dot indicates pin 1 1 0.236 0.003 6,00 0,08 L1 2 L2 3 4 XXXX Dash number 0.138 max 3,50 0.236 0.003 6,00 0,08 Recommended Land Pattern 3 1 4 2 0.167 0.079 4,25 2,00 1 4 0.047 1,2 45 typ 0.260 6,60 2 3 0.060 1,52 Dimensions are in inches mm 0.079 2,00 0.167 4,25 0.260 6,60 Specifications subject to change without notice. Please check our website for latest information. Document 752-2 Revised 10/01/09 (c) Coilcraft, Inc. 2009 |
Price & Availability of LPR6235-123QML
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