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LPR6235 Series

Coupled Inductors for Step-Up & Flyback Applications

RoHS compliant halogen free
This is a new halogen free version recommended for new designs. Only the termination material and part number have changed. The previous version is available only to current customers.
Coilcraft LPR6235 Series low-profile 1:N coupled power inductors are ideal for a variety of voltage step-up and step-down applications, including low voltage step-up in energy harvesting designs. They offer excellent coupling coefficient (K > 0.95) and 200 Vrms, one-minute isolation (hipot) between windings.
  • Different turns ratios for a variety of voltage step-up and step-down applications.
  • Perfect for low voltage step-up in energy harvesting applications
  • Selected by Linear Technology for their LTC3108 and LTC3109 Ultralow Voltage Step-Up Converter and Power Managers
  • Excellent coupling coefficient: K > 0.95
300 Vrms, one minute isolation (hipot) betweeen windings
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Specifications

Electrical specifications at 25°C.

For Flyback Applications

Part number 1 Inductance (µH) 2
(Tolerance: ±20%)
DCR (Ω) 3 Isolation
Voltage (V)
Turns Ratio
L1 max L2 max
LPR6235-752RMR_ 7.5 0.085 285 300 1 : 90
LPR6235-752SMR_ 7.5 0.085 340 300 1 : 100
LPR6235-123QMR_ 13 0.085 200 300 1 : 50
LPR6235-253LMR_ 25 0.74 13.7 300 1 : 10
LPR6235-253PMR_ 25 0.20 72.0 300 1 : 20

For SEPIC Applications

Part number 1 Inductance (µH) 2
(Tolerance: ±20%)
DCR max (Ω) 3 SRF typ (kHz) 4 Isat (A) 5
L1 L2
LPR6235-752RMR_ 7.5 0.085 285 257 1.6
LPR6235-752SMR_ 7.5 0.085 340 230 1.6
LPR6235-123QMR_ 13 0.085 200 360 0.9
LPR6235-253LMR_ 25 0.74 13.7 1300 1.3
LPR6235-253PMR_ 25 0.20 72.0 580 0.7
Notes
  1. When ordering, please specify termination and packaging codes: e.g. LPR6235-253PMRC
  2. Inductance is measured at 100 kHz, 0.1 Vrms, 0 Adc on an Agilent/HP 4284A LCR meter or equivalent.
  3. DCR at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
  4. SRF measured using an Agilent/HP 4191A or equivalent.
  5. Isat: DC current applied to L1 at which the inductance drops 10% from its value without current.

 

Termination:

  • R = Matte tin over nickel over silver
  • Q = RoHS tin-silver-copper (95.5/4/0.5). (Special order, added cost)
  • P = non-RoHS tin-lead (63/37). (Special order, added cost)

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 C instead.
  • D = 13" machine-ready reel
    EIA-481 embossed plastic tape. Factory order only, not stocked (1500 parts per full reel).
Environmental
Environmental:
RoHS compliant , halogen free
Ambient temperature range:
−40°C to +85°C with Irms current.
Storage temperature range:
Component: −40°C to +125°C. Tape and reel packaging: −40°C to +80°C
Maximum part temperature:
+125°C (Ambient + temperature rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
38 per one billion hours/ 26,315,789 hours

Schematics

lpr6235s-(1).gif

Physical characteristics

lpr6235d.gif
dims_inches_mm.gif

Tape and Reel specification

tapereel_pl-(16).gif


 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
7" (178 mm) 13" (330 mm) A B C D E W P Po P1 H T part_or_aj.gif
350 1500* 178/330 60/100 13 22,4 16,4 16 12 4 2 3,68 0,3
* Special order

General specification

Core Material:
Ferrite
Weight:
460 - 480 mg
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

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles
Refer to Soldering Coilcraft Components before soldering.
Recommended Pick & Place Nozzle:
OD: 6.2 mm; ID: ≤ 3.1 mm
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.