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High Isolation Power Transformers
EP7 Platform SMD
Push Pull Converter Transformer
Basic insulation for isolated power supply driver
4.0mm Creepage
4KVrms Isolation (600Vrms continuous)
PH9184.XXXXNL
Mechanical Schematic
2
1
3
5
6
4
PH9185.XXXNL
CTRY MFG
DATE CODE
SCHEMATIC
(.394)
([10.00])
64
3
1
.100[2.54]
.100X2[2.54X2]
.047[1.20]
.394MAX[10.00]
SUGGESTED LAND PAT TERN
.512 MAX
[13.00 MAX]
(.378)
[9.60]
.100±.008
[2.54±.20]
.016±.002
[.40±.05]
1364
3
1
Primary
Primary
Secondary
Secondary
.079 REF
[2.00] REF
.079 REF
[2.00] REF
2X.100[2.54]
=.200±.008[5.08±.20]
13
4
6
6 PLACES
.005[.13]
.492 MAX
[12.50 MAX]
.370
[9.40]
.520
[13.21]
PH9184.XXXNL
Weight ...........................2.6grams
Tape & Reel ........................150/reel
Tray ......................................80/tray
Dimensions:
Unless otherwise specified,
all tolerances are ±
Inches
mm
.010
0,25
Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C
Part
Number
Inductance
(1-3)
(mH ±45%)
Leakage
Inductance
(uH MAX)
Capacitance
(pF MAX)
DCR (1-3)
(Ω MAX)
DCR (4-6)
(Ω MAX)
MAX (1-3)1
(V-µsec Max)
Turns Ratio
(1:3) (6:4)
Isolated Voltage
(Vrms)
PH9184.011NL 12.2 12.5 28.5 1.9 2.4 266 1CT : 1CT
PH9184.021NL 15.0 15.0 26.5 2.1 1.4 296 2CT : 1CT 4000
PH9184.034NL 6.8 5.0 31.5 1.4 2.2 200 3CT : 4CT
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_Primary2 * DCR_Primary + Irms_
Secondary2*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
C. To calculate temperature rise, use the following formula:
Temperature Rise (°C) = 90 * (Core Loss(W) + Copper Loss (W))
4. Optional Tape & Reel packing can be ordered by adding a “T” sux to the part number
(i.e. PH9184.011NL becomes PH9184.011NLT). Pulse complies to industry standard tape
and reel specification EIA481.
5. The “NL” sux indicates an RoHS-compliant part number.
6. The temperature of the component (ambient plus the temperature rise) must be
within the stated operating temperature range.
2power.pulseelectronics.com P782. D (04/19) http://www.power.pulseelectronics.com/contact
High Isolation Power Transformers
EP7 Platform SMD
Pulse Worldwide
Headquarters
15255 Innovation Drive Ste 100
San Diego, CA 92128
U.S.A.
Tel: 858 674 8100
Fax: 858 674 8262
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Pulse Electronics GmbH
Am Rottland 12
58540 Meinerzhagen
Germany
Tel: 49 2354 777 100
Fax: 49 2354 777 168
Pulse China Headquarters
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D708, Shenzhen Academy of
Aerospace Technology,
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Fax: 86 755 33966700
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China
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0428 DUO Tower
Singapore 189352
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Taoyuan City 32057
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Tel: 886 3 4356768
Fax: 886 3 4356820
For More Information
Performance warranty of products oered 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, 2019. Pulse Electronics, Inc. All rights reserved.
Application
PH9184NL 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.
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 conforms to UL60950-1 2 edition with basic insulation for a working voltage up to 300Vac.
3.2mm creepage and 3000Vrms isolation voltage is guaranteed to meet this requirement. The actual isolation and
creepage capability of the design exceeds these UL ratings.
MAXIM is a registered trademark of Maxim Integrated Products.
V
V
PH9184
D2
D1
GND
CC
OUT
VIN
DRIVER
IC
