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PCB transformer

A PCB transformer (Printed Circuit Board Transformer) is a high-frequency electromagnetic device manufactured using the printed circuit board (PCB) process. It replaces the traditional transformer's enameled wire windings with spiral copper foil traces etched onto a multi-layer PCB, combined with a planar magnetic core to achieve energy conversion. Its core breakthrough lies in replacing millimeter-level manual winding with micron-level precision wiring. It represents the evolution of third-generation high-frequency transformer technology.

    Application Scenarios

    High-frequency power supply: GAN fast charging (100kHz+ switching frequency), industrial DC-DC module.

    Communication equipment: Network transformer signal isolation (4kV insulation).

    Automotive electronics: Space-sensitive scenarios for OBC onboard chargers.

     

    Core product features

    Technical Performance

    - The operating frequency is extended to 50Hz-2MHz, compatible with both industrial frequency and high frequency scenarios;

    - Leakage inductance is controlled within 0.5% of the primary inductance, and efficiency is increased to over 92%;

    Structural advantages

    - Height is compressed to 1/3 of the traditional transformer (typical value is 5mm), and the power density reaches 30W/cm³;

    - The core and PCB are encapsulated with epoxy resin, reducing vibration noise by 15dB;

    reliability

    - Insulation resistance >100MΩ under 500VDC test, and 1500VAC withstand voltage meets safety standards;

    - Temperature rise ≤50K at 40℃ ambient temperature, supporting -40℃~125℃ operating range.

     

    Typical application scenarios

    Industrial power modules

    The DC-DC conversion unit used in PLC control cabinets solves the heat dissipation and space conflicts of traditional EI transformers in compact chassis.

    medical devices

    The medical ultrasound probe power isolation module uses its low magnetic leakage characteristics to avoid interference with sensitive signals.

    New energy field

    The boost circuit of the photovoltaic micro-inverter is adapted to the requirements of the high-frequency MPPT algorithm.

     

    Model parameter

    Item

    Core type

    Output power(w)

    Item

    Core type

    Output power(w)

    EI28

    EI28/8x12

    0.5-1

    EI57

    EI57/19x30

    16-32

    EI28

    EI28/8x16

    0.7-1

    EI57

    EI57/19x38

    20-40

    EI35

    EI35/9.6x10

    0.2-0.8

    EI66

    EI66/22x22

    17-35

    EI35

    EI35/9.6x12.5

    0.25-1

    EI66

    EI66/22x 28

    24-45

    EI35

    EI35/9.6x16

    0.4-1.7

    EI66

    EI66/22x35

    36-58

    EI35

    EI35/9.6x20

    0.6-2.5

    EI66

    EI66/22x45

    55-77

    EI41

    EI4/13x13

    0.6-2.3

    EI76

    EI76.2/25.4x25

    65-88

    EI41

    EI41/13x16

    1-36

    EI76

    EI76.2/25.4x31.5

    71-95

    EI41

    EI41/13x21

    1.6-5.5

    EI76

    EI76.2/25.4X40

    70-97

    EI41

    EI41/13x26

    2.3-7.7

    EI76

    EI76.2/25.4X50

    86-123

    EI48

    EI48/16x16

    2-5

    EI85.8

    EI85.8/28.6x29

    70-95

    EI48

    EI48/16x20

    2.8-7.2

    EI85.8

    EI85.8/28.6x36

    84-120

    EI48

    EI48/16x25

    4.6-11.1

    EI85.8

    EI85.8/28.6x46

    105-154

    EI48

    EI48/16x32

    7-10

    EI85.8

    EI85.8/28.6x58

    130-200

    EI54

    EI54/18x18

    5-12

    EI96

    EI96/32x40

    100-150

    EI54

    EI54/18x22.5

    8-17

    EI96

    EI96/32x45

    110-160

    EI54

    EI54/18x29

    11-25

    EI105

    EI105/35

    500-700

    EI54

    EI54/18x36

    17-34

    EI114

    EI114/38

    700-1000

    EI57

    E157/19x19

    7-16

    All the output voltage and current are according to customers requirements

    EI57

    EI57/19x24

    14-21