Data storage device having over-voltage detection and protection

A method performed by a data storage device having a controller coupled to a non-volatile memory device, the method comprising:

• detecting an occurrence of an over-voltage condition, wherein the over-voltage condition is detected by an over-voltage detection circuit;
• operating a voltage clamp of the data storage device in a conduction state in response to the occurrence of the over-voltage condition;
• latching a switching device of the data storage device in a forward conduction mode in response to the voltage clamp operating in the conduction state, wherein the switching device couples a positive voltage bus of a power supply circuit of the data storage device to the voltage clamp when operating in the forward conduction mode;
• receiving an indication of the detected occurrence of the over-voltage condition at the controller;
• storing the occurrence of the over-voltage condition in a memory;
• and
• transmitting the occurrence of the over-voltage condition to an external device.

A data storage device, comprising:

• a power supply circuit, including:
• a voltage clamp configured to operate in a conduction state in response to an over-voltage condition of the power supply circuit;
• a fuse in series with the voltage clamp and the positive voltage bus, wherein the fuse is configured to open in response to a current flowing through the fuse and the voltage clamp exceeding a threshold value;
• a switching device configured to latch in a forward conduction mode in response to the voltage clamp operating in the conduction state, wherein the switching device couples a positive voltage bus to the voltage clamp when operating in the forward conduction mode;
• and
• an over-voltage detection circuit configured to detect an occurrence of an over-voltage event.