Driving device and method of power device

A device, including:

• a detection module, coupled with a power device, and configured to detect an overcurrent status of the power device;
• a driving module, respectively coupled to the detection module and the power device, and configured to regulate the power device according to a detection result of the detection module,
• wherein:
• in response to the detection result indicating that the power device is in a first overcurrent state, the driving module is configured to cause the power device to enter a first protection mode;
• in response to the detection result indicating that the power device is in a second overcurrent state, the detection module continues to detect the overcurrent status of the power device within a first determined time period;
• during the first determined time period, in response to that the power device reaches the first overcurrent state, the driving module is configured to cause the power device to enter the first protection mode;
• and
• in response to the power device remaining in the second overcurrent state at an end of the first determined time period, the driving module is configured to cause the power device to enter a second protection mode, and
• wherein the detection module comprises:
• a first comparator having a first input terrain& configured to receive a first threshold value, a second input terminal configured to receive a current sense signal of the power device, and an output terminal coupled to the driving module to provide a first overcurrent state flag;
• a second comparator having a first input terminal configured to receive a second threshold, a second input configured to receive the current sense signal of the power device, the first threshold being greater than the second threshold;
• and
• a delay unit having a first input terminal and a second input terminal respectively coupled to output terminals of the first comparator and the second comparator, and configured to generate the first determined time period and a second state flag signal based on the output signals of the first comparator and the second comparator within or at the end of the first determined time period.

A driving method, including:

• detecting a current sensing signal related to an overcurrent status of a power device;
• in response to the current sense signal being greater than or equal to a first threshold, driving the power device under a first protection mode to cause the power device to softly turn off and not to respond to a system switching signal, the first threshold corresponding to a first overcurrent state;
• and
• in response to the current sense signal being greater than or equal to a second threshold and less than the first threshold, driving the power device under a second protection mode to cause the power device to softly turn off and be responsive to the system switching signal, the second threshold corresponding to a second overcurrent state.

A driving method for power devices, including:

• detecting a current sensing signal related to an overcurrent status of a power device;
• in response to the current sense signal being greater than or equal to a first threshold, driving the power device under a first protection mode to cause the power device to softly turn off and not to respond to a system switching, signal, the first threshold corresponding to a first overcurrent state;
• in response to the current sense signal being greater than or equal to a second threshold and less than the first threshold, monitoring the current sense signal of the power device within a first determined time period, the second threshold corresponding to a second overcurrent state;
• during the first determined time period, in response to the current sense signal being greater than or equal to the first threshold, driving the power device under the first protection mode to cause the power device to softly turn off and not to respond to the system switching signal;
• and
• at the end of the first determined time period, in response to the current sense signal remaining greater than or equal to the second threshold and less than the first threshold, driving the power device under a second protection mode to cause the power device to softly turn off and be responsive to the system switching signal.