B0860-CL

Document 426
Planar Transformer
For Maxim MAX5069A
PWM Controller
The B0860-C is approved by Maxim for use with their
MAX5069A high-frequency, current-mode, pulse-width
modulation (PWM) controller.
This planar transformer can be used in push-pull, halfbridge and full-bridge topologies. It is ideal for use in
high-current, isolated or nonisolated power supply applications. It offers high efficiency in a low-profile package and features split primary and secondary windings,
a separate auxiliary winding and 1500 Vdc primary to
secondary isolation.
Coilcraft’s Planar Prototyping Kit C356 was used to design this transformer. No tooling or additional parts were
required. To order the kit, contact Coilcraft or purchase
on-line at http://order.coilcraft.com.
Free evaluation samples of B0860-C are available by
contacting Coilcraft or by visiting www.coilcraft.com.
Input OutputOutput Primary Leakage
Turns ratio4
Part
Output voltage voltage current inductance2 inductance3 DCR max
number1 power (W) range (V) nom (V) (A peak)
min (µH)
max (µH)
(mOhms)
pri : sec pri : aux
B0860-CL_
180
36 – 72
12
15
187.0
0.25
Pri: 38.0
10 : 4
10 : 3
Sec:
4.0
Aux:
120.0
1. When ordering, specify a packaging code:
B0860-CLD
Packaging:D =13″ machine ready reel. EIA-481 embossed plastic
tape (200per 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.
Dot indicates pin 1
10
1
0.095
2,41
0.800
20,32
1
2. Inductance measured on an Agilent/HP 4284 between pins 2 and 4 at 250
kHz, 0.1 Vrms, 0 Adc.
3. Leakage inductance measured between pins 2 and 4 at 250 kHz, 0.1 Vrms,
0 Adc with pins 6, 8 and 10 shorted.
4. Turns ratio is with the primary windings and secondary windings connected
in series.
5. Storage and ambient operating temperature range: –40°C to +85°C.
6. Electrical specifications at 25°C.
6
3
8 Sec
4
10
10
0.250
6,35
2
0.810 max
3
20,57
2
Pri
8
4
5
5
6
0.080
Ø
2,03
0.920
max
23,37
6
Recommended
Land Pattern
0.110
Ø
2,79
1
Aux
5
0.360 max
9,14
0.006 /0,15
Weight:
11.8 g
Terminations: Matte tin over nickel over brass
Tape and reel: 200/13″ reel 44 mm tape width
Document 426 Revised 05/10/07
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