Isolation Power Transformers
Toroid Platform SMD
Push Pull Converter Transformer
Functional insulation for isolated power supply driver
2.5KVrms isolation (380Vrms continuous)
Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C
Part
Number
PH9085.011NL
PH9085.012NL
PH9085.021NL
PH9085.034NL
PH9085.035NL
PH9085.038NL
PH9085.043NL
PH9085.083NL
PH9085.089NL
Inductance
(1-3)
(µH
±35%)
1020
1020
1160
1020
1020
1020
1160
1160
1160
Leakage Inductance
(1-3) with
Capacitance
(4-6) shorted (1, 2, 3) to (4, 5, 6)
(µH MAX)
(pF MAX)
0.8
0.6
1.6
0.6
0.6
0.7
0.8
2.0
0.6
30
40
20
40
40
40
30
15
40
DCR (1-3)
(Ω MAX)
0.60
0.85
0.60
0.60
0.80
0.85
0.60
0.60
0.60
DCR (4-6)
(Ω MAX)
0.65
1.60
0.35
0.75
1.20
2.00
0.50
0.30
0.70
MAX (1-3)
1
(V-µsec Max)
22
22
23.6
22
22
22
23.6
23.6
23.6
Turns Ratio
(1:3) (6:4)
1CT : 1CT
1CT : 2CT
2CT : 1CT
3CT : 4CT
3CT : 5CT
3CT : 8CT
4CT : 3CT
8CT : 3CT
8CT :9CT
2500
Isolated Voltage
2
(Vrms)
Notes:
1. The maximum volt-usec rating limits the peak flux density to 3600 gauss when used in
bi-polar drive application with 200KHz. For unipolar drive applications or a bi-polar drive
with 350kHz, a maximum volt-usec could be 60% of the listed value. For Push-Pull top-
ology, where the voltage is applied across half the primary winding turns, the maximum
volts-use needs to be derated by 50%.
2. The AEC-Q200 temperature and humidity operational life testing was
completed using a dielectric strength test of 2750Vdc.
3. Continuous isolation voltage confirmed by 125°C/1000hrs accelerated aging
with the bias voltage applied between primary and secondary windings.
Mechanical
PH9085.XXXXNL
Schematic
Weight
...........................0.365grams
Tape & Reel
........................700/reel
Tray
......................................55/tray
Dimensions:
Inches
mm
Unless otherwise specified,
all tolerances are
±
.010
0,25
USA 858 674 8100
1
Germany
49 2354 777 100
Singapore 65 6287 8998
Shanghai 86 21 62787060
China 86 755 33966678
Taiwan 886 3 4356768
P759.C (01/17)
pulseelectronics.com
Isolation Power Transformers
Toroid Platform SMD
Application
PH9085.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 2W) 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
PH9085
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.
MAXIM is a registered trademark of Maxim Integrated Products.
For More Information
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Nanshan District
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Taiwan R. O. C.
Shenzhen, PR China 518057
Tel: 886 3 4356768
Tel: 858 674 8100
Tel: 49 2354 777 100
Tel: 86 755 33966678
Tel: 86 21 62787060
Tel: 65 6287 8998
Fax: 886 3 4356823 (Pulse)
Fax: 858 674 8262
Fax: 49 2354 777 168
Fax: 86 755 33966700
Fax: 86 2162786973
Fax: 65 6287 8998
Fax: 886 3 4356820 (FRE)
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, 2016. Pulse Electronics, Inc. All rights reserved.
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