Electronic controller unit

An electronic controller unit, ECU, comprising a heatsink comprising a cooling unit having a first upper and second lower cooling plate and a fluid channel arranged between the cooling plates and configured to receive a cooling fluid, wherein the cooling fluid is circulated through the channel in proximity to said cooling plates;

• a first printed circuit board, PCB;
• a second printed circuit board, PCB, and
• a plurality of components located on said PCBs;
• wherein the heatsink is arranged between the first and second PCBs, and
• configured for thermally coupling to components located on said PCBs, and is configured to provide a thermal coupling of components to a respective cooling plate to effect cooling of components, as required;
• wherein the first PCB is connected to the second PCB by a board-to-board, B2B, connector which is configured to electrically and/or communicatively connect the PCBs located above and below the heatsink;
• and
• wherein the upper and lower cooling plates each comprise a plurality of thermally conducting pedestals extending outwardly therefrom towards the PCBs and components located thereon, wherein each pedestal is configured to provide a thermal coupling of a component to a respective cooling plate, for cooling.