Document 1299
For TI UCC2897 12 V/264 W
Active Clamp Forward
SMT Planar Transformer
• Developed for Texas Instruments UCC2897 Active Clamp
Forward (PMP7376 reference design)
• Designed for 52 – 60 Vdc input; 12 V, 22 A output
• High efficiency; excellent DCR; very low leakage inductance;
• 1500 Vrms, one minute primary to secondary isolation (hipot)
Core material Ferrite
Terminations Matte tin over nickel over brass.
Weight 22.0 g
Ambient temperature –40°C to +125°C
Maximum part temperature +155°C (ambient + temp rise)
Storage temperature Component: –40°C to +155°C.
Tray 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 36 per tray
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Primary
Leakage
inductance2
max (µH)
Volt-time
Turns
Pri Sec Aux
DCR max (mOhms)
Part
number
inductance1
±±20 (µH)
product typ3
(V-µsec)
Pri
Sec
Aux
Output
NA5738-DL
5
2
2
100
0.18
4.8
1.7
18
94.5
12 V, 22 A
1. Inductance is for the primary, measured on Agilent/HP 4284A at
200 kHz, 0.5 Vrms, 0 Adc.
2. Leakage Inductance is for the primary, measured at 100 kHz,
0.1 Vrms, 0 Adc with secondary pins shorted.
3. Volt-time product is based on primary turns and 3000 gauss.
4. Output of the aux winding is 12 V.
1.032
26,20
max
5. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1.110
max
28,20
2
7
Pri
0.453
11,50
max
3
Sec
5
1
Aux
4
0.004/0,102
0.966
24,54
0.236
6,00
typ
0.325
8,25
Recommeded
Land Pattern
typ
C
L
0.087
2,20
typ
0.080
2,03
(2)
∅
0.133
3,38
(4)
∅
inches
mm
Dimensions are in
Specifications subject to change without notice.
Document 1299 Revised 01/15/16
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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