7342 COUPLED INDUCTORS Coupled Inductors for Critical Applications Tight coupling (k ≥ 0.97) and 200 V isolation make the ST526PND series of coupled inductors ideal for use in a variety of circuits including flyback, multi-output buck and SEPIC. These inductors provide high inductance, high efficiency and excellent current handling in a rugged, low cost part. They can also be used as two single inductors connected in series or parallel, as a common mode choke or as a 1 : 1 transformer. + + D L1 VIN C L2 C VOUT – SW – 0.295 max 7,5 0.295 max 7,5 Typical Flyback Converter L2 + 1 2 L1 L2 3 4 VIN SW L1 D Recommended Suggested Land Pattern 0.110 2,8 0.091 2,3 2 1 0.083 2,1 2 1 3 4 0.130 3,3 0.043 1,10 0.063 1,6 Dimensions are in inches mm ® VOUT – D – + C1 L2 Q C Typical SEPIC schematic VOUT – Core material Ferrite Terminations RoHS compliant matte tin over nickel over phos bronze. Other terminations available at additional cost. Weight 0.76 – 0.87g Ambient temperature –40°C to +85°C with Irms current, +85°C to +125°C with derated current Storage temperature Component: –55°C to +125°C. Tape and reel packaging: –55°C to +80°C Winding to winding isolation 200 Vrms 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) Packaging 250/7″ reel; 1000/13″ reel Plastic tape: 16 mm wide, 0.4 mm thick, 12 mm pocket spacing, 4.9 mm pocket depth Specifications subject to change without notice. Please check our website for latest information. 1102 Silver Lake Road Cary IL 60013 © Coilcraft, Inc. 2012 AUX Typical Buck Converter with auxiliary output VIN 0.028 0,7 C – L1 0.181 max 4,6 4 VOUT + + 3 + C – Dot indicates pin 1 123 0.150 3,8 D Document ST621-1 Revised 02/15/12 Phone 800-981-0363 Fax 847-639-1508 E-mail [email protected] Web www.coilcraft-cps.com 7342 COUPLED INDUCTORS Coupled Inductors – ST526PND CouplingLeakage Inductance2 DCR max3 SRF typ4 coefficient L typ5 Part number1 ±20% (µH) (Ohms) (MHz) typ (µH) ST526PND252MLZ 2.5 0.033 55 0.97 0.14 ST526PND332MLZ 3.3 0.037 43 0.99 0.09 ST526PND472MLZ 4.7 0.051 35 0.99 0.11 ST526PND562MLZ 5.6 0.063 32 0.99 0.09 ST526PND682MLZ 6.8 0.070 30 0.99 0.14 ST526PND822MLZ 8.2 0.075 27 0.98 0.25 ST526PND103MLZ 10 0.100 22 0.98 0.30 ST526PND123MLZ 12 0.120 20 0.98 0.36 ST526PND153MLZ 15 0.130 18 0.98 0.49 ST526PND183MLZ 18 0.170 15 >0.99 0.16 ST526PND223MLZ 22 0.220 13.5 >0.99 0.20 ST526PND273MLZ 27 0.250 12.0 >0.99 0.20 ST526PND333MLZ 33 0.270 11.0 >0.99 0.15 ST526PND393MLZ 39 0.380 10.0 0.99 0.70 ST526PND473MLZ 47 0.420 9.5 >0.99 0.30 ST526PND563MLZ 56 0.460 8.7 >0.99 0.51 ST526PND683MLZ 68 0.600 7.3 >0.99 0.51 ST526PND823MLZ 82 0.680 6.2 0.99 1.17 ST526PND104MLZ 100 0.770 5.5 >0.99 0.96 ST526PND124MLZ 120 1.03 4.5 >0.99 0.61 ST526PND154MLZ 150 1.35 4.0 >0.99 0.54 ST526PND184MLZ 180 1.52 3.8 >0.99 0.75 ST526PND224MLZ 220 1.72 3.5 >0.99 1.43 ST526PND274MLZ 270 2.41 3.3 >0.99 1.56 ST526PND334MLZ 330 2.70 3.0 >0.99 1.65 ST526PND394MLZ 390 3.05 2.8 0.99 4.73 ST526PND474MLZ 470 4.00 2.6 0.99 5.50 ST526PND564MLZ 560 4.43 2.5 >0.99 4.85 ST526PND684MLZ 680 5.00 2.3 0.99 7.59 ST526PND824MLZ 820 6.80 2.2 >0.99 8.01 ST526PND105MLZ1000 7.80 2.0 >0.99 8.69 (A)6 Irms (A) 10% 20% 30% both one windings7 winding8 drop drop drop 6.0 6.26.3 2.17 3.06 5.2 5.35.4 2.05 2.89 4.1 4.34.6 1.74 2.46 3.9 4.14.2 1.57 2.22 3.7 3.83.9 1.49 2.10 3.3 3.43.5 1.44 2.03 2.8 2.93.0 1.24 1.76 2.5 2.62.7 1.14 1.61 2.2 2.32.4 1.09 1.54 2.0 2.22.3 0.95 1.35 1.9 2.02.1 0.84 1.19 1.7 1.81.9 0.79 1.11 1.5 1.61.7 0.76 1.07 1.3 1.41.5 0.64 0.90 1.2 1.31.4 0.61 0.86 1.1 1.21.3 0.58 0.82 1.0 1.11.2 0.51 0.72 0.90 1.001.1 0.48 0.67 0.80 0.920.98 0.45 0.63 0.70 0.800.90 0.39 0.55 0.65 0.760.80 0.34 0.48 0.62 0.660.73 0.32 0.45 0.59 0.620.66 0.30 0.42 0.55 0.570.60 0.25 0.36 0.49 0.520.54 0.24 0.34 0.45 0.470.50 0.23 0.32 0.41 0.430.46 0.20 0.28 0.38 0.400.42 0.19 0.26 0.36 0.370.38 0.18 0.25 0.30 0.320.35 0.15 0.21 0.27 0.29 0.31 0.14 0.20 Isat 1. When ordering, please specify termination and testing codes: Temperature rise calculation based on specified Irms ST526PND105MLZ Termination:L = RoHS compliant matte tin over nickel over phos bronze. Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non-RoHS tin-lead (63/37). Testing:Z =COTS H = Screening per Coilcraft CP-SA-10001 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 which the inductance drops the specified amount 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. See temperature rise calculation. 8. Maximum current when applied to one winding that causes a 40°C temperature rise from 25°C ambient. See temperature rise calculation. 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. Winding power loss = (IL12 + IL22 ) × DCR in Watts (W) 129°C Temperature rise (t) = Winding power loss × W 129°C 2 2 t = (IL1 + IL2 ) × DCR × W ® Example 2. 526PND-123ML (IL1 = 1.4 A, IL2 = 0.6 A) Winding power loss = (1.4 2 + 0.6 2) × 0.120 = 0.278 W t = 0.278 W × 129°C = 36°C W Coupled Inductor Core and Winding Loss Calculator 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. Visit www.coilcraft-cps.com/coupledloss. Specifications subject to change without notice. Please check our website for latest information. 1102 Silver Lake Road Cary IL 60013 © Coilcraft, Inc. 2012 Example 1. 526PND-123ML (Equal current in each winding) Winding power loss = (1.14 2 + 1.14 2) × 0.120 = 0.312 W 129°C = 40°C t = 0.312 W × W Document ST621-2 Revised 02/15/12 Phone 800-981-0363 Fax 847-639-1508 E-mail [email protected] Web www.coilcraft-cps.com 7342 COUPLED INDUCTORS Coupled Inductors – ST526PND Typical L vs Current Typical L vs Frequency 10000 10000 1000 µH 100 µH 100 47 µH 10 µH 10 1000 µH 1000 470 µH Inductance (µH) Inductance (µH) 1000 470 µH 100 µH 100 47 µH 10 µH 10 4.7 µH 4.7 µH 1 0.01 1 0.1 10 1 0.1 Current (A) 10 1 100 Frequency (MHz) Irms Derating 120 110 90 80 70 60 50 40 25°C Percent of rated Irms 100 30 20 10 0 -40 -20 0 20 40 60 80 100 120 140 Ambient temperature (°C) ® Specifications subject to change without notice. Please check our website for latest information. 1102 Silver Lake Road Cary IL 60013 © Coilcraft, Inc. 2012 Document ST621-3 Revised 02/15/12 Phone 800-981-0363 Fax 847-639-1508 E-mail [email protected] Web www.coilcraft-cps.com