Connaught Electronics Limited

Beniamin Dragoi

Sergio Bantiles

A system having a load device coupled to an output of an electronic control unit (ECU) via a coaxial cable, and the ECU is disclosed. The ECU has a power supply configured to provide power for the load device, a power over coaxial cable (PoC) filter coupled to the output, a high side switch (HSS) coupled to the power supply and to the PoC filter via an HSS output line, and a diode disposed in the HSS output line and configured to substantially eliminate current flow from the output towards the HSS, while allowing current to flow from the HSS towards the load device from the HSS.

High side switch protection for power over coaxial cable systems

A load device coupled to an output of an ECU via a coaxial cable is disclosed. The ECU provides power to the load device, and has a power over coaxial cable (PoC) filter coupled to the output, a high side switch (HSS) coupled to the power supply and to the PoC filter via an HSS output line, a diode disposed in the HSS output line that eliminates current flow from the output towards the HSS, while allowing current flow from the HSS towards the load device, a diode resistor in parallel with the diode that allows a current to flow past the diode towards the HSS while a short-to-battery scenario is occurring, and a pull down resistor (RPD) disposed between the output line of the HSS and a ground prior to the diode configured to pull the voltage at the HSS output down to zero while an open load scenario is occurring.

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Tuam, Ireland

Beniamin Dragoi