HigH Frequency Wire Wound
TransFormers
EFD20 Platforms - THT
Power Range:
Up to120W
Height:
13.0mm Max
Footprint:
22.4mm x 21.0mm Max
Topology:
Forward and Flyback
electrical specifications @ 25°c — operating Temperature -40°c to 130°c
5
Pri. Inductance
Lk. Inductance
PA1040NL
DCR
Hi-Pot
K1 Factor
Pri. Inductance
Lk. Inductance
PA1425NL
DCR
Hi-Pot
K1 Factor
Pri. Inductance
Lk. Inductance
PA1426NL
DCR
Hi-Pot
K1 Factor
Pri. Inductance
Lk. Inductance
PA1522NL
DCR
(2-3)
(2-3) with (5,6,7,8) shorted
(2-3)
(5-6)
(7-8)
(1-4)
Pri-Sec
23
(1,2-3,4)
(1,2-3,4) with (5,6,7,8) shorted
(2-3)
(1-4)
(7,8-5,6)
Pri-Sec
23
(7,8-5,6)
(7,8-5,6) with (2-3) shorted
(7,8-5,6)
(2-3)
Pri-Sec
263
(1,2-3,4)
(1,2-3,4) with (5,6,7,8) shorted
(1-3)
(2-4)
(8,7-6,5)
Pri-Sec
26.9
(1-2)
(1-2) with (5,6,7,8) shorted
(1-2)
(3-4)
(5-6)
(7-8)
Pri-Sec
32.3
222µH ±30%
2µH MAX
45mΩ MAX
15mΩ MAX
24mΩ MAX
80mΩ MAX
1500 Vdc
110µH ±30%
2µH MAX
82mΩ MAX
102mΩ MAX
7.5mΩ MAX
1500 Vrms
10.6µH ±7%
1.5µH MAX
13mΩ MAX
480mΩ MAX
1500 Vrms
2
30−57V
250 KHZ
3
1
2.0
1.0
5
+ 12V, 5A
6
7
−
12V, 1.6A
8
AR
1
2
34−80V
200 KHZ
3
4
2
10µH, 20mA
3
Y
12V, 0.1A
1.0
1.0
4
2.0
1.0
1.0
1.0
1
2
36—72 V
200 KHz
4
3
6.0
1.0
1
32—75 V
250 KHz
2
3
8 V, 20 mA
4
0.4
0.4
1.0
1.2
FOWARD TRANSFORMER
7,8
12V, 10A
5,6
IN
160.2µH ±33%
1.5µH MAX
60mΩ MAX
72mΩ MAX
2.5mΩ MAX
1800 Vdc
40µH ±10%
0.33µH MAX
18mΩ MAX
61mΩ MAX
24mΩ MAX
62mΩ MAX
1500 Vrms
FOWARD TRANSFORMER
7,8
10µH, 10A
5,6
IM
1
OUTPUT INDUCTOR
8,7
3.3 V, 30A
6,5
EL
Pri. Inductance
Lk. Inductance
DCR
Hi-Pot
K1 Factor
FOWARD TRANSFORMER
5
24 V, 4 A
6
7
8 V, 20 mA
8
PR
PA2583NL
FOWARD TRANSFORMER
USA 858 674 8100 • Germany 49 7032 7806 0 • Singapore 65 6287 8998 • Shanghai 86 21 32181071 • China 86 755 33966678 • Taiwan 886 3 4643715
www.pulseeng.com
PRELIMINARY P677.A (3/09)
HigH Frequency Wire Wound
TransFormers
EFD20 Platforms - THT
notes
1. The temperature of the component (ambient plus temperature rise) must
be within the stated operating temperature range.
2. The above transformers and inductors have been tested and approved
by Pulse’s power IC partners and are sited in the appropriate datasheet
or evaluation board documentation at these companies. To determine
which IC and IC partners are matched with the above Pulse part num-
bers please consult the IC Cross Reference on the Pulse website.
3. For flyback topology applications, it is necessary to ensure that the trans-
former will not saturate in the application. The peak flux density (Bpk)
should remain below 2700Gauss. To calculate the peak flux density use
the following formula:
Bpk (Gauss) = K1_Factor * Ipk(A)
4. In high volt-µsec applications, it is important to calculate the core loss of
the transformer. Approximate transformer core loss can be calculated as:
CoreLoss (W) = 1.32E-13 * (Freq_kHz)
1.63
* (DB_Gauss)
2.63
where
DB
can be calculated as:
For Flyback Topology:
DB
= K1_Factor *
D(A)
For Forward Topology:
DB
= K1_Factor * Volt-µsec
5. The “NL” suffix indicates an RoHS-compliant part number. Non-NL suf-
fixed parts are not necessarily RoHS compliant, but are electrically and
mechanically equivalent to NL versions. If a part number does not have
the “NL” suffix, but an RoHS compliant version is required, please con-
tact Pulse for availability.
mechanical
.826
20,98
PR
For more information:
Pulse Worldwide
Headquarters
12220 World Trade Dr.
San Diego, CA 92128
U.S.A.
www.pulseeng.com
TEL: 858 674 8100
FAX: 858 674 8262
EL
.882
22,40
Pulse European
Headquarters
Einsteinstrasse 1
D-71083 Herrenberg
Germany
IM
Pulse China
Headquarters
B402, Shenzhen Academy of
Aerospace Technology Bldg.
10th Kejinan Rd.
High-Tech Zone
Nanshan District
Shenzen, PR China 518057
TEL: 86 755 33966678
FAX: 86 755 33966700
IN
Pulse North China
Room 1503
XinYin Building
No. 888 YiShan Rd.
Shanghai 200233
China
TEL: 86 21 32181071
FAX: 86 21 32181396
TEL: 49 7032 7806 0
FAX: 49 7032 7806 12
This is a “Preliminary” product data sheet. Products mentioned on this data sheet are in development and in the process of being qualified. These products are not fully
released nor are they in production. Features, specifications and performance of products offered are subject to change without notice. Other brand and product names
mentioned herein may be products and/or registered trademarks of their respective owners. For current information on this product, please contact the Pulse office
nearest you and ask for the “Power Applications Engineer.” © Copyright, 2009. Pulse Engineering, Inc. All rights reserved.
www.pulseeng.com
AR
Y
Pulse South Asia
135 Joo Seng Rd.
#03-02
PM Industrial Bldg.
Singapore 368363
Pulse North Asia
No. 26
Kao Ching Rd.
Yang Mei Chen
Taoyuan Hsien
Taiwan, R. O. C.
32667
TEL: 886 3 4643715
FAX: 886 3 4641911
TEL: 65 6287 8998
FAX: 65 6280 0080
2
PRELIMINARY P677.A (3/09)
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