HigH Frequency Wire Wound
TransFormers
EF25 Platforms - THT Horizontal
AC/DC and DC/DC Switching Transformers
Reinforced Insulation
3000 Vrms Hi-pot
Height:
20.8mm Max
Footprint:
29.2mm x 27.9mm Max
Topology:
Flyback
electrical specifications @ 25°c — operating Temperature -40°c to 130°c
5
Pri. Inductance
Lk. Inductance
PA1297NL
DCR
Hi-Pot
K1 Factor
Pri. Inductance
Lk. Inductance
PA2547NL
DCR
Hi-Pot
K1 Factor
Pri. Inductance
Lk. Inductance
PA2611NL
DCR
(3-1)
(3-1) with (7-9) shorted
(3-1)
(9-7)
(4-5)
Pri-Sec
1528.3
(3-1)
(3-1) with (7-9) shorted
(3-1)
(9-7)
(4-5)
Pri-Sec
4152.8
1-3)
(1-3) with (6,7,8,9,10) shorted
(1-3)
(10-8)
(7-6)
(4-5)
Pri-Sec
2.7
(3-1)
(3-1) with (7-9) shorted
(3-1)
( 9-7)
( 4-5)
Pri-Sec
1537.3
(1-3)
(1-3) with (4,5,6,7,8,9,10) shorted
(1-3)
(9-10)
(5-4)
(6-7)
Pri-Sec
1179.8
380µH ±10%
11µH MAX
945mW MAX
40mW MAX
85mW MAX
3000Vrms
90-380Vdc
3.2
200kHz
IN
AR
Y
1.0
9
28V / 1.1A
1
4
5
7
13V / .02A
0.46
IM
1
1850µH ±15%
21µH MAX
930mW MAX
223mW MAX
408mW MAX
3000Vrms
9
47V / 0.64A
190-370Vdc
140kHz
3.3
1.0
1
4
5
7
47V / .02A
1.0
EL
Hi-Pot
K1 Factor
Pri. Inductance
Lk. Inductance
DCR
Hi-Pot
K1 Factor
Pri. Inductance
Lk. Inductance
DCR
Hi-Pot
K1 Factor
9850µH ±15%
40µH MAX
790mW MAX
220mW MAX
15mW MAX
80mW MAX
3000Vrms
860µH ±15%
78µH MAX
910mW MAX
3050mW MAX
350mW MAX
4000Vrms
275µH ±10%
8.4µH MAX
250mW MAX
160mW MAX
400mW MAX
311mW MAX
3000Vrms
375-390Vdc
100kHz
1
4.24
1.0
1.0
3
4
0.29
13V / 0.02A
10
9
8
7
6
45V / 1.1A
5
0.29
13V / 0.3A
HALF-BRIDGE TRANSFORMER
PR
400V
80kHz
3
1.0
1.0
9
140V / 75W
PA2676NL
1
4
0.167
7
25V / 0.02A
5
FLYBACK TRANSFORMER
85-305Vdc
80-200kHz
1
1.96
1.0
10
35V / 0.7A
PA2804NL
3
4
0.57
16V / 0.02A
9
7
0.44
13V / 0.02A
5
6
FLYBACK 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 P681.A (5/09)
HigH Frequency Wire Wound
TransFormers
EF25 Platforms - THT Vertical
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) = 3.9E-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.
EL
1
IM
1.10
27,94 MAX
5
SQ .027 (9X)
0,69
.80
20,32
5
4
6
7
8
9
10
9X
Ø
(.063)
1,60
1
LAYOUT (PIN VIEW)
.82 MAX
20,82
PR
For more information:
Pulse Worldwide
Headquarters
Pulse Europe
1.15
MAX
29,21
IN
PULSE
PA2804NL
DATE ORIGIN
10
6
.20
4X 5,08
3
2
Pulse China Headquarters Pulse North China
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
Room 1503
XinYin Building
No. 888 YiShan Rd.
Shanghai 200233
China
Tel: 86 21 54643211/2
Fax: 86 21 54643210
Einsteinstrasse 1
12220 World Trade Dr. D-71083 Herrenberg
San Diego, CA 92128 Germany
U.S.A.
www.pulseeng.com
Tel: 858 674 8100
Fax: 858 674 8262
Tel: 49 7032 7806 0
Fax: 49 7032 7806 135
Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product
names mentioned herein may be trademarks or registered trademarks of their respective owners.
© Copyright, 2009. Pulse Engineering, Inc. All rights reserved.
www.pulseeng.com
AR
Y
mechanical
Pulse South Asia
135 Joo Seng Rd.
#03-02
PM Industrial Bldg.
Singapore 368363
TEL: 65 6287 8998
FAX: 65 6280 0080
Pulse North Asia
No. 26, Kao Ching Rd.
Yang Mei Chen
Taoyuan Hsien
Taiwan
R. O. C.
Tel: 886 3 4643715
Fax: 886 3 4641911
2
PRELIMINARY P681.A (5/09)
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
