A9786_13 Datasheet, PDF (1/2 Pages) Coilcraft lnc. – Planar Magnetics

Document 328-1
Planar Magnetics For National Semiconductor
LM5041 IC
This planar transformer and inductor pair were designed
specifically for National Semiconductor’s LM5041 IC.
The A9786-A transformer is engineered for use in high-
current telecom power supply applications that require high
efficiency in a low-profile package.The auxiliary winding
can be used to control input current to PWMs. It offers
very high current handling capability and extremely low
DC resistance in a low profile package.
Coilcraft’s A9787-A inductor is designed as the output
choke for the LM5041.
Planar magnetics offer high power densities along with
great reliability and repeatability. Windings are etched
into a printed circuit board, ensuring high efficiency and
consistency.
Request free evaluation samples by contacting Coilcraft
or visiting www.coilcraft.com.
Transformer
Input
Part
Output voltage Output
  _ number1 _{power (W) range (V) voltage (V)}
Output
Primary
Leakage
  _{current  inductance}1   _inductance2
DCR max
(A rms) min (mH)
max (µH)
(mOhms)
Pri/sec
isolation
(Vdc)
A9786-AL_ 150
36 – 75
2.5
60.0
1.25
0.90
Primary: 62.5 (1 – 3)

Secondary: 0.91 (5,6 – 9,10)
200 (4 – 11)
1100
1. When ordering, please specify packaging code:
Packaging:
A9786-ALD
D = 13″ machine-ready reel. EIA-481 embossed plastic
tape (125 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 3 at
250 kHz, 0.1 Vrms, 0 Adc.
3. Leakage inductance measured between pins 1 and 3 at 100 kHz, 0.1 Vrms,
0 Adc with all secondary pins shorted.
4. Operating temperature range: –40°C to +85°C.
5. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
5,6
0.004 /0,10
3
1.23 _max
31,24
2
1
1.48 _max
37,59
5
10
0.45 _max
11,43
4
1
0.285
7,24 2
1.32
33,53
1.21
30,73
1.15
29,21
10
3
5
11
0.075
1,91
‡
Recommended
Land Pattern
1
8T
Pri 2
8T
3
11
0.31
7,87
1T
7,8 Sec
1T
9,10
4
4T
Aux
11
4
0.12
3,05
0.175
4,45
Weight:  33.4 g
Terminations: Matte tin over nickel over brass
Tape and reel:  125/13″ reel  56 mm tape
US [phone] [e-mail]
UK [phone] [e-mail]
Taiwan [phone] [e-mail]
China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
Document 328-1  Revised 06/09/08
© 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.