LPR6235-253PML Datasheet, PDF (1/2 Pages) Coilcraft lnc. – Miniature Step-Up / Flyback Transformers

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 trans-
former applications.
The high Isat and low DCR ratings of these low profile
parts provide high efficiency and excellent current han-
dling in a rugged, low cost design.
Custom inductance values and turn ratios are available
upon request.
Part
number¹
Primary (L1) ^{DCR max}
Turns inductance^{2 (Ohms)}
ratio ± 20% (µH) L1 L2
LPR6235-253PML_ 1 : 20
25
0.20 58
LPR6235-123QML_ 1 : 50
12.5 0.080 200
LPR6235-752RML_ 1 : 90
7.5 0.085 267
LPR6235-752SML_ 1 : 100
7.5 0.085 305
SRF
typ³ Isat⁴
(MHz) (A)
580 0.7
382 0.9
257 1.6
244 1.6
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 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
+
D
L1
L2
C
V_IN
C
PWM
+
V_OUT
–
–
Typical Step-Up / Flyback Converter
Core material Ferrite
Weight 460 – 480 mg
Terminations RoHS compliant silver-palladium-platinum-glass frit.
Other terminations available at additional cost.
Ambient temperature –40°C to +85°C with Irms current, +85°C to
+125°C with derated current
Storage temperature Component: –40°C to +125°C.
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)
Mean Time Between Failures (MTBF) 26,315,789 hours
Failures in Time (FIT) 38 per one billion hours
Packaging 350/7″reel; 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
© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
Document 752-1 Revised 10/01/09