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Author Author: Jan Cumps
Date Created: 18 Jul 2020 6:30 PM Date Created
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Peek inside an SMD Ethernet transformer

18 Jul 2020

On many Ethernet devices, you find magnetics - a transformer - as part of the physical layer.

The example above is from a TI TM4C launchpad. It looks like a solid block - like a silicon package.

I have a defect launchpad so I scavenged some parts.

To my surprise, this is how the transformer looks like from the underside:

Surprisingly old school.

Supplier's schematic: Pulse HX1198FNL

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Gough Lui over 4 years ago

I'm surprised this one wasn't covered in potting compound / resin, as most of them seem to be.

- Gough
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Jan Cumps over 4 years ago in reply to Gough Lui

Gough Lui wrote:

I'm surprised this one wasn't covered in potting compound / resin, as most of them seem to be.

- Gough
The coils seem to be glued in. They are fixed on the spot. But no potting.
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Jan Cumps over 4 years ago in reply to Gough Lui

Gough Lui wrote:

I'm surprised this one wasn't covered in potting compound / resin, as most of them seem to be.

- Gough
The coils seem to be glued in. They are fixed on the spot. But no potting.
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- Vote Up +2 Vote Down
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