Document 900
For TI UCC2897A Active
Clamp PWM Controller
Planar Transformer
• Developed for Texas Instruments PMP4804 and PMP5997
Demo Board/Reference Design
• Designed as active clamp in forward topology
• Auxiliary winding provides current to the chipset
• Input voltage range: 36 – 75 V
Core material Ferrite
Terminations RoHS matte tin over nickel over brass. Other termina-
tions available at additional cost.
Weight 11.6 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, 9.35 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other
solvents, see Doc787_PCB_Washing.pdf
Output
voltage
nom (V)
Output
current
(Adc)
Primary
Leakage
Pri/sec
Isolation
(Vdc)
Part
Output
power (W)
inductance2 inductance3
DCR max4
(mOhms)
Turns ratio
pri : sec1 : sec2 : aux
number1
min (µH)
max (µH)
JA4309-AL_
100
3.3
30
67.5
0.35
pri: 20.0
sec: 0.5
aux: 160
6 : 1 : 1 : 4
1500
1. When ordering, please specify a packaging code:
JA4309-ALD
2. Inductance measured on an Agilent/HP 4284 between pins 2 and 4 at
200 kHz, 0.1 Vrms, 0 Adc.
3. Leakage inductance measured between pins 2 and 4 at 100 kHz,
0.1 Vrms, 0 Adc with all secondary pins shorted.
4. DCR for the secondary is for each winding.
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic
tape (200 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.
5. Electrical specifications at 25°C.
Dot indicates pin 1
2
0.125
3,18
0.800
20,32
6
0.080
2,03
10
9
Æ
10
9
Sec1
Primary
3
1
2
3
4
5
1
2
7
9
0.810
20,57
max
3
4
5
7
6
7
6
0.125
3,18
4
1
Sec2
10
0.095
2,41
0.110
Æ
Recommended
Land Pattern
2,79
Aux
5
0.920
23,37
max
Parts manufactured prior
to December 2011 may
be marked differently.
0.360
9,14
max
0.006/0,15
inches
mm
Dimensions are in
Specifications subject to change without notice.
Document 900 Revised 12/16/11
US +1-847-639-6400 sales@coilcraft.com
Please check our website for latest information.
UK +44-1236-730595 sales@coilcraft-europe.com
© Coilcraft Inc. 2016
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.
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
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