Document 833-1 For Flyback, SEPIC, Zeta and other Applications Coupled Inductors LPD6235 Tight coupling (k 0.97) makes the LPD6235 series of coupled inductors ideal for use in a variety of circuits including flyback, multi-output buck, SEPIC and Zeta. These coupled miniature shielded inductors are 3.5 mm high and 6.0 mm square. They provide high inductance, high efficiency and excellent current handling in low cost part. They can be used as two single inductors connected in series or parallel, as a common mode choke or as a 1 : 1 transformer. + + D C V L1 L2 OUT C V IN SW Typical Flyback Converter + 0.236 0.003 D V OUT C AUX 6,0 0,08 Dot indicates pin 1 L2 14 ++ 0.236 0.003 L1 6,0 0,08 V OUT V D C IN SW XXXX 23 Typical Buck Converter with auxiliary output Dash Internal number code D ++ L1 C1 0.138 max 3,5 Recommended V V C Q L2 C OUT IN LandPattern 1 4 45 typ Typical SEPIC schematic 0.047 1,20 0.167 0.079 0.260 4,25 2,00 6,60 ++ L2 C1 Q 3 2 V CCD V L1 OUT IN 0.079 0.079 2,00 2,00 0.167 4,25 Typical Zeta schematic 0.260 6,60 1 4 inches Dimensions are in L1 L2 mm 3 2 Document 833-1 Revised 07/15/13 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2014 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 833-2 Coupled Inductors LPD6235 Series 6 Isat (A) Irms (A) 5 DCR SRF Coupling Leakage 2 3 4 Inductance max typ coefficient L typ 10% 20% 30% both one 1 7 8 Part number 20% (H) (Ohms) (MHz) typ (H) drop drop drop windings winding LPD6235-682ME 6.8 0.108 31 0.99 0.10 2.80 3.00 3.12 1.60 2.26 LPD6235-103ME 10 0.157 27 0.99 0.12 2.50 2.70 2.80 1.40 1.98 LPD6235-223ME 22 0.300 15 >0.99 0.15 1.50 1.67 1.73 0.85 1.20 LPD6235-473ME 47 0.620 9.7 >0.99 0.21 0.90 0.98 0.99 0.60 0.85 LPD6235-474ME 470 3.50 3.0 >0.99 0.61 0.18 0.22 0.23 0.25 0.35 LPD6235-105ME 1000 7.00 1.9 >0.99 1.05 0.12 0.14 0.15 0.15 0.21 LPD6235-155ME 1500 10.8 1.5 >0.99 1.70 0.12 0.12 0.13 0.14 0.20 LPD6235-205ME 2000 16.0 1.3 >0.99 2.10 0.08 0.11 0.12 0.11 0.16 1. Please specify termination and packaging codes: Coupled Inductor Core and Winding Loss Calculator This web-based utility allows you to enter frequency, peak-to-peak LPD6235-205MEC (ripple) current, and Irms current to predict temperature rise and overall Termination: E = RoHS compliant Silver-palladium-platinum-glass frit. losses, including core loss. Go to online calculator. Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non- RoHS tin-lead (63/37). Core material Ferrite Packaging: C = 7 machine-ready reel. EIA-481 embossed plastic Core and winding loss Go to online calculator tape (350 parts per full reel). Weight 420 480 mg B = Less than full reel. In tape, but not machine ready. To have a leader and trailer added ( 25 charge), use Environmental RoHS compliant, halogen free code letter D instead. Terminations RoHS compliant silver-palladium-platinum-glass frit. D = 13 machine-ready reel. EIA-481 embossed plastic Other terminations available at additional cost. tape. Factory order only, not stocked (1500 parts per Ambient temperature 40C to +85C with Irms current, +85C to full reel). +125C with derated current 2. Inductance shown for each winding, measured at 100 kHz, 0.1 Vrms, Storage temperature Component: 40C to +125C. 0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads Tape and reel packaging: 40C to +80C are connected in parallel, inductance is the same value. When leads are connected in series, inductance is four times the value. Winding to winding isolation 100 V 3. DCR is for each winding. When leads are connected in parallel, DCR Resistance to soldering heat Max three 40 second reflows at is half the value. When leads are connected in series, DCR is twice the +260C, parts cooled to room temperature between cycles value. Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30C / 4. SRF measured using an Agilent/HP 4191A or equivalent. When leads 85% relative humidity) are connected in parallel, SRF is the same value. Failures in Time (FIT) / Mean Time Between Failures (MTBF) 5. Leakage inductance is for L1 and is measured with L2 shorted. 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 6. DC current, at which the inductance drops the specified amount from its Packaging 350/7 reel 1500/13 reel Plastic tape: 16 mm wide, value without current. It is the sum of the current flowing in both wind- 0.3 mm thick, 12 mm pocket spacing, 3.68 mm pocket depth ings. Recommended pick and place nozzle OD: 6.2 mm ID: 3.1 mm 7. Equal current when applied to each winding simultaneously that causes PCB washing Tested with pure water or alcohol only. For other solvents, a 40C temperature rise from 25C ambient. See temperature rise see Doc787 PCB Washing.pdf. calculation. 8. Maximum current when applied to one winding that causes a 40C temperature rise from 25C ambient. See temperature rise calculation. 9. Electrical specifications at 25C. Refer to Doc 639 Selecting Coupled Inductors for SEPIC Applications. Refer to Doc 362 Soldering Surface Mount Components before soldering. Document 833-2 Revised 07/15/13 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2014 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.