SMT Isolation Transformers Selection Guide Datasheet by Pulse Electronics

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SMT ISOLATION TRANSFORMERS
LOW POWER ISOLATION TRANSFORMERS
Low Power Isolation Transformers are used in a wide-assortment of applications and circuits for the communications, computing, medical, industrial and automotive market
segments. Traditionally isolation transformers were used to isolate signals between low voltage and high voltage circuits, provide voltage to gate drive circuitry and turn-on
and control IGBTs. In addition, they are used to power isolated communication interfaces such as RS-232 and RS-485. With the proliferation of high voltage battery packs in
automotive and energy storage applications the demand for compact, high isolation transformers is growing exponentially.
Isolation transformers are used primarily in energy transfer topologies such as push-pull, half-bridge or full-bridge but they are also used in energy storage topologies such
as quasi resonant and discontinuous mode flybacks.
The selection of the appropriate isolation transformer will depend on:
1) End-Application Safety Requirements
* Minimum isolation voltage to comply with the applications working voltage.
* Level of insulation (Functional, Basic, Reinforced)
* Minimum safety distances (creepage and clearances)
2) End-Application Electrical Requirements
* Selected Topology
* Input and Output Voltages which will dictate the turns ratio
* Operating Frequency which, along with the input voltage will set the volt-usecs
* Output power to ensure the selected component is sized correctly
Pulse parts are designed to be UL and TUV compliant where indicated in accordance the IEC60950, IEC61558, IEC60601 safety standards.
Selected designs have also been safety standard certified.
Pulse offers both commercial and automotive grade parts.
Gate Driver
High Side Gate
Low Side Gate
Source
Drain
VCC D1
D2
Driver
IC
GND
Push-pull Isolation Transformer
VOUT
Primary
Secondary
Power IC
Flyback Isolation Transformer
High Side, Low Side H-Bridge
Series Isolation Insulation UL Creepage Topology IATF
6.6 5.8 5.3 PH9084 1500Vrms Functional - 28-37 -
7.1 6.1 5.5 PA2777 1500Vrms Basic 1.4mm 9.3 -
8.0 6.6 5.3 P0926 1500Vdc Functional - 23 -
8.3 6.9 3.0 PG1427 2700Vdc Functional - 21-30 -
8.6 6.7 2.5 PE-68386, PA2001 1500Vrms Functional - 21-30 -
8.6 6.7 3.6 PA0264, PA2004 1000Vrms Functional - 12-20 -
9.5 7.1 5.3 PA1323 1500Vrms Functional - 21.7 -
10.2 7.5 11.0 PH9572, PH9572A 12.0 42.84 -
9.5 8.1 5.1 PH9085, PM2180 2500Vrms Functional 22.24 Yes*
11.8 8.8 4.0 P0544, PA2002 "1500Vdc Functional 1.4mm 45-60 -
11.8 8.8 4.0 1500Vrms Basic 1.4mm 27-53 -
11.8 8.8 4.0 1500Vrms Basic 1.4mm 17-26 -
10.9 9.7 2.7 PA3493 1650Vrms Basic 1.4mm 21.7 -
10.0 10.0 12.5 PH9184 4000Vrms Basic 4.0mm 200-296 -
10.0 10.0 12.5 PH9185, PM2190 5000Vrms Reinforced 8.0mm 36-110 Yes*
10.5 10.3 12.5 PH9496 2500Vrms Basic 6.2mm - -
9.2 12.5 7.6 PH9384, PM2185 4000Vrms Reinforced 8.3mm - Yes*
13.0 10.0 12.5 PH0416 5000Vrms Reinforced 8.3mm - -
13.0 12.0 7.1 PH9363 2500Vrms Basic 2.8mm - -
16.5 15.6 7.1 PH9385, PM2155 4000Vrms Basic 12.0mm 70-109 Yes*
16.7 16.5 14.2 PH9400, PH9400A 4000Vrms Basic 12.0mm 125-375 -
SCHEMATIC 1 SCHEMATIC 2 SCHEMATIC 3 SCHEMATIC 4
Available Schematics
(multiple turns ratios available)
*See specific datasheeet for details
SMT Isolation Transformer Solutions
UPDATED 05/01/20
Energy Transfer
(schematic 1)
Energy Transfer
(schematic 1)
Energy Transfer
(schematic 4)
Energy Transfer
(schematic 1)
Energy Transfer
(schematic 1)
Energy Transfer
(schematic 1)
Energy Transfer
(schematic 4)
Energy Transfer
(schematic 4)
Energy Transfer
(schematic 4)
Energy Transfer
(schematic 2)
Energy Transfer
(schematic 2)
Energy Transfer
(schematic 2)
Energy Transfer
(schematic 2)
Energy Transfer
(schematic 1)
Energy Transfer
(schematic 1)
Energy Transfer
(schematic 4)
Energy Transfer
(schematic 4)
PA0173, PA0185
PA2005, PA2006
PA0184, PA0297, PA0510,
PA2007, PA2008, PA2009
Volt-usec
Rating
(V-usec)
L W H
Energy Transfer
(schematic 2)
Energy Transfer
(schematic 4)
Energy Transfer
(schematic 3)
Energy Transfer
(schematic 1)
Dimensions
1500Vrms
2500Vrms
Functional
Basic