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B0357_13 Datasheet, PDF (1/2 Pages) Coilcraft lnc. – Planar Magnetics
Document 372-1
Planar Magnetics For National Semiconductor
LM5025 and LM5034
Planar transformer and inductor pair designed for the NSC
LM5110 Gate Driver and LM5025 Active Clamp Voltage
Mode PWM Controller.
These parts are also specified by NSC for use with their
LM5034 Dual Interleaved Controller.
Core material Ferrite
Terminations  RoHS Matte-tin over nickel over brass
Weight  11.3 – 11.7 g
Ambient temperature  –40°C to +85°C
Storage temperature  Component: –40°C to +85°C.
Tape and reel packaging: –40°C to +80°C
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 200 per 13″ reel  Plastic tape: 44 mm wide,
0.37 mm thick, 32 mm pocket spacing, 9.4 mm pocket depth
PCB washing  Only pure water or alcohol recommended
Transformer
Part
Output
Output
 number1
power (W) voltage (V)
Output
Primary
Leakage
  current  inductance2   inductance3
DCR max
(A rms)
min (µH)
max (µH)
(mOhms)
Pri/sec
isolation
(Vdc)
B0357-BL_
100
3.3
30.0
320.0
0.55
Primary: 55.0
1500
Secondary: 1.0  
1. When ordering, please specify packaging code:
Packaging:
B0357-BLD
D = 13″ machine ready reel. EIA-481 embossed plastic
tape (200 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.
2. Inductance measured on an Agilent/HP 4284 between pins 1 and 2 at
250 kHz, 0.1 Vrms, 0 Adc.
3. Leakage inductance measured between pins 1 and 2 at 100 kHz,
0.1 Vrms, 0 Adc with secondary pins shorted.
4. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
0.920
23,37
max
1
4
0.810
20,57
max
3
2
Parts manufactured prior
to December 2011 may
be marked differently.
0.200
0.400 5,08
10,16
Ø
0.080
2,03
0.800
20,32
1
4
2
3
Recommended
Land Pattern
0.125
3,18
0.250
6,35
Ø
0.110
2,79
1
3
Pri
Sec
2
4
12 : 2
0.360
9,14
max
0.006 /0,15
Dimensions are in
inches
mm
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
Document 372-1  Revised 12/19/11
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.