Hot and hazardous indicator on solid state drives

1. A solid state drive (SSD) comprising:

an enclosure;

a non-volatile memory (NVM) device;

a device controller coupled to the NVM device;

a capacitor;

a backup voltage line coupled to the capacitor; and

a safety assembly comprising:

a timer circuit including an input node coupled to the backup voltage line, a reset node, and an output node,

an indicator circuit coupled to the output node of the timer circuit, and

a temperature comparator circuit coupled to the reset node of the timer circuit, wherein if a temperature of the enclosure exceeds a threshold while a backup voltage is present on the backup voltage line, the temperature comparator circuit causes the timer circuit to trigger light pulses from the indicator circuit.

2. The SSD of claim 1 , wherein the timer circuit includes:

a regulator including the input node, a regulator output node, and an enablement node, and

a timer device including the output node, the reset node, and a timer input node coupled to the regulator output node.

3. The SSD of claim 2 , wherein the enablement node is coupled to a main voltage line, wherein a lack of a main voltage on the main voltage line enables the timer circuit and the light pulses while the SSD is powered off, and wherein a presence of main voltage on the main voltage line disables the light pulses and the light pulses while the SSD is powered on.

4. The SSD of claim 2 , wherein the enablement node is coupled to a ground connection, and wherein the ground connection enables the timer circuit and the light pulses while the SSD is powered on and powered off.

5. The SSD of claim 2 , wherein the regular includes a low dropout regulator.

6. The SSD of claim 2 , wherein the regular includes a buck-boost regulator.

7. The SSD of claim 1 , wherein the temperature comparator circuit includes:

a temperature comparator device coupled to a ground connection and the reset node, and

a divider resistor coupled to the reset node and a step-down voltage line of the timer circuit.

8. The SSD of claim 1 , wherein the indicator circuit includes:

a switch coupled to the output node and a ground connection,

a light emitting diode (LED) coupled to the switch, and

a series resistor coupled to the LED and a step-down voltage line of the timer circuit.

9. A safety assembly comprising:

a timer circuit including an input node coupled to a backup voltage line, a reset node, and an output node;

an indicator circuit coupled to the output node of the timer circuit; and

a temperature comparator circuit coupled to the reset node of the timer circuit, wherein if an enclosure temperature exceeds a threshold while a backup voltage is present on the backup voltage line, the temperature comparator circuit causes the timer circuit to trigger light pulses from the indicator circuit.

10. The safety assembly of claim 9 , wherein the timer circuit includes:

a regulator including the input node, a regulator output node, and an enablement node; and

a timer device including the output node, the reset node, and a timer input node coupled to the regulator output node.

11. The safety assembly of claim 10 , wherein the enablement node is coupled to a main voltage line, wherein a lack of a main voltage on the main voltage line enables the timer circuit and the light pulses, and wherein a presence of main voltage on the main voltage line disables the timer circuit and the light pulses.

12. The safety assembly of claim 10 , wherein the enablement node is coupled to a ground connection, and wherein the ground connection enables the timer circuit and the light pulses.

13. The safety assembly of claim 10 , wherein the regular includes a low dropout regulator.

14. The safety assembly of claim 10 , wherein the regular includes a buck-boost regulator.

15. The safety assembly of claim 9 , wherein the temperature comparator circuit includes:

a temperature comparator device coupled to a ground connection and the reset node; and

a divider resistor coupled to the reset node and a step-down voltage line of the timer circuit.

16. The safety assembly of claim 9 , wherein the indicator circuit includes:

a switch coupled to the output node and a ground connection;

a light emitting diode (LED) coupled to the switch; and

a series resistor coupled to the LED and a step-down voltage line of the timer circuit.

17. A method of operating a safety assembly, the method comprising:

causing, by a temperature comparator circuit, a timer circuit to trigger light pulses from an indicator circuit if an enclosure temperature exceeds a threshold while a backup voltage is present on a backup voltage line, wherein the timer circuit includes an input node coupled to the backup voltage line, a reset node, and an output node, wherein the indicator circuit is coupled to the output node of the timer circuit, and wherein the temperature comparator circuit is coupled to the reset node of the timer circuit.

18. The method of claim 17 , wherein the timer circuit includes a regulator including the input node, a regulator output node, and an enablement node and a timer device including the output node, the reset node, and a timer input node coupled to the regulator output node, wherein the enablement node is coupled to a main voltage line, and wherein the method further includes:

enabling, via a lack of a main voltage on the main voltage line, the timer circuit and the light pulses; and

disabling, via a presence of main voltage on the main voltage line, the timer circuit and the light pulses.

19. The method of claim 17 , wherein the timer circuit includes a regulator including the input node, a regulator output node, and an enablement node and a timer device including the output node, the reset node, and a timer input node coupled to the regulator output node, wherein the enablement node is coupled to a ground connection, and wherein the method further includes enabling, via the ground connection, the timer circuit and the light pulses.