Electric system comprising a load driving apparatus by auto-recovery mode, and method of operating the apparatus

摘要

A driver for an electric load includes a power device having a control terminal and an output terminal for an output current, and a control module. The control module is configured to drive the power device in an auto-recovery mode by switching between activation and deactivation in the occurrence of an overcurrent condition, wherein the output current reaches a threshold current. The control module is also configured to evaluate a first time interval between a time wherein the overcurrent condition occurs, and a first time, and generate a limit signal when the time interval is equal to a time threshold. The power device is driven in a switching-off condition at least as a function of the limit signal.

主权项

1. A driving apparatus for an electric load comprising:
a power device having a control terminal and an output terminal for an output current to be supplied to the electric load; and a control module configured to
drive said power device in an auto-recovery mode, by switching between activation and deactivation responsive to an overcurrent condition wherein the output current reaches a current threshold, with said power device remaining in a fully on state when the output current reaches the current threshold,evaluate a first time interval between a time when the overcurrent condition occurs, and a first time,generate a limit signal when the time interval is equal to a time threshold, anddrive said power device to a switching-off condition at least as a function of the limit signal; said control module comprising a control and drive module configured to
evaluate a temperature increase of said power device associated with a second time interval and between generating the limit signal and a second time, andgenerate a first signal for switching off said power device when the evaluated temperature increase reaches a first threshold temperature.