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MOSFETs embedded into PC boards

Schweizer will embed power MOSFETs directly in a PCB instead of mounted on the board exterior. The thermal benefits of this innovation enable higher power density that is ideal for 48V automotive power systems in Mild Hybrid cars (Courtesy of NY Daily News).

A Mild Hybrid (Image courtesy of NY Daily News).

A Mild Hybrid (Image courtesy of NY Daily News).

In an effort to reduce CO2 while an automobile is in traffic, Infineon MOSFETs have been embedded into PC boards by Schweizer Electronic AG. When a chip is embedded, the Power MOSFETs need not be soldered onto a circuit board but integrated within the board itself. There are thermal benefits to this architecture which allows a higher power density. Board integration also further improves system reliability. The ultimate result is higher power and improved cost effectiveness in 48 V systems.

A system PC Board with integrated power MOSFETs (Image courtesy of Schweitzer)

A system PC Board with integrated power MOSFETs (Image courtesy of Schweitzer)

48 V starter generators contribute significantly to CO₂ reduction of up to about 15 percent achieved by a mild hybrid vehicle as compared to a conventional drive train. The engine is stopped more often and for a longer duration than a 12 V based start-stop-system. This architecture also boosts acceleration leading to reduced load on the combustion engine. As a plus, during braking they also recover more of the kinetic energy than a 12 V system.

Continental Powertrain, the first company to adopt this technology, will be implementing this new technology in a 48 V starter generator for vehicles from a major European carmaker. Dietmar Vogt, System Technical Project Leader at Continental Powertrain says, “Chip embedding allows us to increase electrical power by 60 percent compared to a traditionally designed system.” <>

Infineon will supply its leading MOSFET technology, OptiMOS 5, to the new approach while Schweizer will use their embedding power PCB technology called Smart p2 Pack . The partners plan to start mass production in 2021.

2 comments on “MOSFETs embedded into PC boards

  1. DaveR1234
    May 22, 2019

    It'll be interesting to see if they can pass automotive qualification.

  2. Steve Taranovich
    May 22, 2019

    @DaveR1234—Good point! We will be watching

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