High Isolation Power Transformers
EP7 Platform SMD
Push Pull Transformer
Reinforced insulation for isolated power supply driver
8mm creepage
5KVrms isolation (600Vrms continuous)
UL and TUV certified
Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C
Part
Number
PH9185.011NL
PH9185.012NL
PH9185.013NL
PH9185.021NL
PH9185.034NL
PH9185.038NL
PH9185.043NL
PH9185.083NL
Inductance (1-3) Leakage Inductance
(µH
±45%)
(µH MAX)
750
450
200
1800
750
310
1260
2350
1.2
0.9
0.6
3.0
1.2
0.9
1.5
6.0
DCR (1-3)
(Ω MAX)
0.50
0.40
0.35
0.75
0.50
0.44
0.70
0.90
DCR (4-6)
(Ω MAX)
0.55
0.80
0.95
0.45
0.75
1.00
0.56
0.40
ET MAX (1-3)
1
(V-µsec MAX)
66
52
36
100
66
44
89
110
CAP
(pF MAX)
10.0
10.0
8.0
10.0
10.0
8.0
12.0
8.0
Turns Ratio
(1:3) (6:4)
1CT : 1CT
1CT : 2CT
1CT : 3CT
2CT : 1CT
3CT : 4CT
3CT : 8CT
4CT : 3CT
8CT : 3CT
5000
Isolated Voltage
2
(Vrms)
Notes:
1. The ET Max is calculated to limit the core loss and temperature rise at 100KHz based on a
bipolar flux swing of 180mT Peak.
2. For Push-Pull topology, where the voltage is applied across half the primary winding
turns, the ET needs to be derated by 50% for the same flux swing.
3. The applied ET may need to be further derated for higher frequencies based on the
temperature rise which results from the core and copper losses
A. To calculate total copper loss (W), use the following formula:
Copper Loss (W) = Irms_Primary
2
* DCR_Primary + Irms_Secondary
2
*DCR_Secondary
B. To calculate total core loss (W), use the following formula:
Core Loss (W) = 4.40E-10 * (Frequency in kHz)
1.67
* (180 * [ET/ET Max])
2.53
Where ET is the applied Volt Second, ET Max is the rated Volt Second for 180mT flux
swing
4.
5.
6.
7.
C. To calculate temperature rise, use the following formula: Temperature Rise (°C) =
90 * (Core Loss(W) + Copper Loss (W))
The AEC-Q200 temperature and humidity operational life testing was completed using a
dielectric strength test of 5000Vdc.
Optional Tape & Reel packing can be ordered by adding a “T” suffix to the part number
(i.e. PH9185.012NL becomes PH9185.012NLT). Pulse complies to industry standard tape and
reel specification EIA481.
The “NL” suffix indicates an RoHS-compliant part number.
Continuous isolation voltage confirmed by 125°C/1000hrs accelerated aging with the bias
voltage applied between primary and secondary windings.
PH9185.XXXNL
Mechanical
6
4
Schematic
1
6
Primary
Secondary
5
Primary
3
Secondary
4
SCHEMATIC
2
6
4
PH9185.XXXNL
R
.100[2.54]
.100X2[2.54X2]
.047[1.20]
1
3
C
US
E119132 F2
.370
[9.40]
.520
[13.21]
DATE CODE
1
CTRY MFG
3
.394MAX[10.00]
SUGGESTED LAND PATTERN
(.394)
([10.00])
1
3
2X.100[2.54]
=.200±.008[5.08±.20]
Weight
...................2.6grams
Tape & Reel
...............150/reel
Tray
.............................80/tray
Dimensions:
Inches
mm
.492 MAX
[12.50 MAX]
Unless otherwise specified,
all tolerances are
±
.010
0,25
6
4
.016±.002
[.40±.05]
.079 REF
[2.00] REF
1
3
.100±.008
[2.54±.20]
.079 REF
[2.00] REF
(.378)
[9.60]
.512 MAX
[13.00 MAX]
.005[.13]
6 PLACES
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High Isolation Power Transformers
EP7 Platform SMD
Application
PH9185.XXXNL is a series of high isolation power supply transformer drivers. Intended to operate in a fixed duty cycle Push Pull topology, it is a part of a low cost solution
for delivering lower power (up to 3W) from a low voltage source. A typical implementation would be an isolated RS-485/RS-232 power supply driver circuit, the design is
compatible with the MAXIM™ MAX253 IC.
A schematic diagram for the Push Pull converter topology is given below.
V
IN
V
CC
D1
PH9185
V
OUT
DRIVER
IC
D2
GND
For a fixed 50% duty cycle mode of operation, the output voltage is simply determined by the input voltage and turns ratio. So, with the available turns ratios, a variety of
output voltages can be selected.
This transformer design has been certified by UL to comply with UL60950-1 2
nd
edition, and CAN/CSA C22.2 NO. 60950-1-07 2
nd
edition; and by TUV to comply with EN61558-1
and EN61558-2-16 with reinforced insulation for a working voltage up to 400Vac 8mm creepage and 5000Vrms isolation voltage is guaranteed to meet this requirement. The
design also complies with the Pulse’s class F insulation system. PH9185.013NL was not included in the original UL/TUV certification but is complaint. Cost reduced versions
without UL/TUV certification available, please contact Pulse Electronics for more information.
MAXIM is a registered trademark of Maxim Integrated Products.
For More Information
Pulse Worldwide
Pulse Europe
Headquarters
Pulse Electronics GmbH
15255 Innovation Drive Ste 100
Am Rottland 12
San Diego, CA 92128
58540 Meinerzhagen
U.S.A.
Germany
Pulse China Headquarters
Pulse Electronics (ShenZhen) CO., LTD
D708, Shenzhen Academy of
Aerospace Technology,
The 10th Keji South Road,
Nanshan District, Shenzhen,
P.R. China 518057
Tel: 86 755 33966678
Fax: 86 755 33966700
Pulse North China
Room 2704/2705
Super Ocean Finance Ctr.
2067 Yan An Road West
Shanghai 200336
China
Tel: 86 21 62787060
Fax: 86 2162786973
Pulse South Asia
3 Fraser Street
0428 DUO Tower
Singapore 189352
Pulse North Asia
1F., No.111 Xiyuan Rd
Zhongli City
Taoyuan City 32057
Taiwan (R.O.C)
Tel: 858 674 8100
Fax: 858 674 8262
Tel: 49 2354 777 100
Fax: 49 2354 777 168
Tel: 65 6287 8998
Fax: 65 6280 0080
Tel: 886 3 4356768
Fax: 886 3 4356820
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, 2018. Pulse Electronics, Inc. All rights reserved.
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