Document 580-1 Coupled Inductors – LPD4012 For Flyback, SEPIC and other Applications • Only 1.1 mm high and 4 mm square • Ideal for use in flyback, multi-output buck and SEPIC applications. • High inductance, high efficiency and excellent current handling • Can also be used as two single inductors connected in series or parallel or as a common mode choke. + + D L1 C L2 VOUT C VIN – SW – Typical Flyback Converter D L2 + VOUT C AUX – + VIN 0.155 ±0.003 3,94 ±0,076 Dash number 0.155 ±0.003 3,94 ±0,076 VIN Internal code – Recommended Land Pattern 1 4 0.031 0,78 0.103 0.049 2,606 1,24 1 2 4 L2 45° typ 0.174 4,40 3 2 L1 D + L1 0.0433 ±0.004 1,10 ±0,10 0.049 1,24 0.103 2,606 0.174 4,40 Dimensions are in 3 VOUT C – 3 0.060 1,52 D Typical Buck Converter with auxiliary output 4 XXX X SW – Dot indicates pin 1 1 2 + L1 inches mm C + C1 Q L2 Typical SEPIC schematic C VOUT – Core material Ferrite Core and winding loss Go to online calculator + + Weight 54 – 64 mg C1 halogen freeL2 Environmental RoHS compliant, Q Terminations RoHS compliant D over nickel over C C silver.VOUT VIN L1 matte tin Other terminations available at additional cost. Ambient temperature –40°C to +85°C with (40°C rise) Irms current. – – Maximum part temperature +125°C (ambient + temp rise). Typical Zeta schematic Storage temperature Component: –40°C to +125°C. Tape and reel packaging: –40°C to +80°C Winding to winding isolation 100 V Resistance to soldering heat Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 85% relative humidity) Failures in Time (FIT) / Mean Time Between Failures (MTBF) 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 Packaging 1000/7″ reel; 3500/13″ reel Plastic tape: 12 mm wide, 0.25 mm thick, 8 mm pocket spacing, 1.32 mm pocket depth Recommended pick and place nozzle OD: 4 mm; ID: ≤ 2 mm PCB washing Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787_PCB_Washing.pdf. Document 580-1 Revised 11/09/15 Document 580-2 Coupled Inductors for SEPIC Applications – LPD4012 Series Coupling Leakage Inductance2 DCR max3 SRF typ4 coefficient L typ5 1 Part number (µH) (Ohms) (MHz) typ (µH) LPD4012-331NR_ 0.33 ±30% 0.042 LPD4012-561NR_ 0.56 ±30% 0.087 LPD4012-821NR_ 0.82 ±30% 0.100 LPD4012-152NR_ 1.5 ±30% 0.185 LPD4012-222NR_ 2.2 ±30% 0.235 10% drop Isat (A)6 Irms (A) 20% 30% both one drop drop windings7 winding8 255 185 130 86 70 0.94 0.95 0.97 0.97 0.98 0.06 0.08 0.09 0.11 0.14 5.2 3.7 3.2 2.50 2.30 5.4 3.8 3.3 2.81 2.40 5.6 3.9 3.4 2.91 2.50 1.87 1.30 1.21 1.15 0.95 2.65 1.84 1.72 1.62 1.35 0.98 0.98 0.99 0.99 0.99 0.16 0.18 0.20 0.22 0.24 1.80 1.60 1.50 1.20 1.10 1.90 1.70 1.60 1.52 1.20 2.00 1.80 1.60 1.63 1.30 0.75 0.65 0.55 0.60 0.55 1.06 0.92 0.78 0.86 0.78 LPD4012-332NR_ 3.3 ±30% LPD4012-472MR_ 4.7 ±20% LPD4012-562MR_ 5.6 ±20% LPD4012-682MR_ 6.8 ±20% LPD4012-822MR_ 8.2 ±20% 0.320 0.500 0.620 0.530 0.600 48 39 32 31 29 LPD4012-103MR_ 10 ±20% LPD4012-153MR_ 15 ±20% LPD4012-223MR_ 22 ±20% LPD4012-333MR_ 33 ±20% LPD4012-473MR_ 47 ±20% 0.750 1.13 1.63 1.83 2.52 25 21 15 12 8.8 0.99 0.99 0.99 >0.99 >0.99 0.26 0.30 0.34 0.41 0.51 0.98 0.90 0.70 0.37 0.33 1.00 0.92 0.82 0.57 0.39 1.10 0.94 0.84 0.58 0.40 0.50 0.43 0.34 0.31 0.28 0.71 0.60 0.48 0.44 0.39 LPD4012-683MR_ 68 ±20% LPD4012-823MR_ 82 ±20% LPD4012-104MR_ 100 ±20% LPD4012-124MR_ 120 ±20% LPD4012-154MR_ 150 ±20% 3.23 3.66 4.76 5.54 6.90 7.8 7.3 6.1 5.3 4.6 >0.99 >0.99 >0.99 >0.99 >0.99 0.66 0.75 0.86 0.98 1.19 0.27 0.27 0.22 0.21 0.18 0.36 0.27 0.28 0.26 0.26 0.37 0.29 0.29 0.27 0.27 0.25 0.23 0.20 0.19 0.17 0.36 0.31 0.27 0.27 0.23 8.75 11.24 17.00 4.1 3.3 2.8 >0.99 >0.99 >0.99 1.40 1.66 2.45 0.16 0.15 0.13 0.21 0.16 0.16 0.23 0.17 0.16 0.14 0.12 0.10 0.18 0.17 0.14 LPD4012-184MR_ LPD4012-224MR_ LPD4012-334MR_ 180 ±20% 220 ±20% 330 ±20% 1. Please specify termination and packaging codes: Coupled Inductor Core and Winding Loss Calculator LPD4012-334MRC Termination: R = RoHS compliant, matte tin over nickel over silver. Special order: Q = RoHS tin-silver-copper (95.5/4/0.5) or P = non-RoHS tin-lead (63/37). Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic tape (1000 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 (3500 parts per full reel). 2. Inductance shown for each winding, measured at 100 kHz, 0.1 Vrms, 0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads are connected in parallel, inductance is the same value. When leads are connected in series, inductance is four times the value. 3. DCR is for each winding. When leads are connected in parallel, DCR is half the value. When leads are connected in series, DCR is twice the value. 4. SRF measured using an Agilent/HP 4191A or equivalent. When leads are connected in parallel, SRF is the same value. 5. Leakage Inductance is for L1 and is measured with L2 shorted. 6. DC current at 25°C that causes the specified inductance drop from its value without current. It is the sum of the current flowing in both windings. 7. Equal current when applied to each winding simultaneously that causes a 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. 8. Maximum current when applied to one winding that causes a 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. 9. Electrical specifications at 25°C. Refer to Doc 639 “Selecting Coupled Inductors for SEPIC Applications.” Refer to Doc 362 “Soldering Surface Mount Components” before soldering. This web-based utility allows you to enter frequency, peak-to-peak (ripple) current, and Irms current to predict temperature rise and overall losses, including core loss. Go to online calculator. Document 580-2 Document 580-2 Revised 11/09/15 Revised 02/15/11 Document 580-3 Coupled Inductors for SEPIC Applications – LPD4012 Series Typical L vs Current Typical L vs Frequency 1000 1000 330 µH 330 µH 100 µH 33 µH 10 µH 10 100 µH 100 Inductance (µH) Inductance (µH) 100 3.3 µH 1.5 µH 33 µH 10 µH 10 3.3 µH 1.5 µH 1 1 0.33 µH 0.1 0.01 0.1 Current (A) 0.33 µH 1 10 0.1 0.1 1 10 100 Document 580-3 Document 580-3 Revised 11/09/15 Revised 02/15/11 Frequency (MHz)