Patent ID: 11955790
Assignee: LISA DRÄXLMAIER GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. An electronic fuse circuit for safeguarding a multi-channel electronic power distributor, the electronic fuse circuit comprising:
a driver circuit for each channel of the multi-channel electronic power distributor, wherein the driver circuit is configured to control an electronic switch of a corresponding channel of the multi-channel electronic power distributor to assume a certain state;
a microcontroller interface configured to receive a command for adjusting a state of the electronic switch of each channel of the multi-channel electronic power distributor from a microcontroller, wherein the driver circuit of the corresponding channel is configured to set the state of the electronic switch of the corresponding channel of the multi-channel electronic power distributor according to the command from the microcontroller;
and a safety circuit for detecting a malfunction in at least one of the microcontroller and the multi-channel electronic power distributor,
wherein in response to a detected malfunction in the least one of the microcontroller and the multi-channel electronic power distributor, the driver circuit of each channel is configured to set the state of the electronic switch of the corresponding channel of the multi-channel electronic power distributor according to a channel-specific preconfigured safety state,
the driver circuit of each channel is configured to determine a transient undervoltage at a voltage supply terminal of the corresponding channel based on a detection of a terminal voltage at the voltage supply terminal, and
the safety circuit is configured to switch off the electronic switch of the corresponding channel when the terminal voltage falls below a first switch-off threshold value.