B0853-AL Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Planar Transformer

Document 403
Planar Transformer ForNSCLM5033PWMController
for IBC Applications
The B0853-A was designed specifically for the National
Semiconductor LM5033 high voltage PWM controller.
This planar transformer can be used in push-pull, half-
bridge and full-bridge topologies.
It is ideal for use in high-current power supply applications
such as open loop intermediate bus converters (IBC)
and closed loop voltage mode converters. It offers high
efficiency in a low-profile package and features a split
secondary, 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 B0853-A are available by
contacting Coilcraft or by visiting www.coilcraft.com.
Part
number¹
B0853-AL_
Output
power (W)
200
Input
voltage
range (V)
40 – 60
Output
voltage
nom (V)
10
Output
current
(A peak)
20
Primary
inductance²
min (µH)
46.8
Leakage
inductance³
max (µH)
0.10
DCR max
(mOhms)
Pri: 10.4
Sec: 4.0
Aux: 160.0
Turns ratio⁴
pri : sec : aux
5:4:4
1. When ordering, please specify packaging code:
B0853-ALD
Packaging: 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 3 and 4 at
250 kHz, 0.1 Vrms, 0 Adc.
3. Leakage inductance measured between pins 3 and 4 at 100 kHz,
0.1 Vrms, 0 Adc with pins 6 and 10 shorted.
4. Turns ratio is with the secondary windings connected in series.
5. Storage and ambient operating temperature range: –40°C to +85°C.
6. Electrical specifications at 25°C.
Dot indicates pin 1
1
0.810 _max
20,57
3
4
5
10
8
6
0.920
23,37
max
0.095 0.190 ¹
2,41 4,83
0.800
20,32
10 _0.250
6,35
Ø
0.080
2,03
5
6
Recommended
Land Pattern
Ø
0.110
2,79
3
Pri
4
1
Aux
5
6
8 Sec
10
0.360
9,14
max
0.006 /0,15
Weight:
11.6 g
Terminations: Matte tin over nckel over brass
Tape and reel: 200/13″ reel 44 mm tape width
© Coilcraft, Inc. 2007
Specifications subject to change without notice.
Please check our website for latest information.
Document 403 Revised 05/10/07