Apparatus and method for detecting reflow process

摘要

Circuitry and method for detecting occurrence of a reflow process to an embedded storage device are disclosed. A temperature sensing device includes a resistor, a temperature sensor, and a comparator. The first terminal of the resistor is coupled to a voltage source, and the second terminal of the resistor is coupled to both the first terminal of the temperature sensor and the first input of the comparator. The second terminal of the temperature sensor is grounded and the second input of the comparator is coupled to a reference voltage. The resistance state of the temperature sensor changes from a first resistance state to a second resistance state when the temperature surrounding the temperature sensor reaches a threshold. The comparator generates an output based on the resistance changes of the temperature sensor. The generated output may indicate whether a reflow process has occurred to the embedded storage device.

主权项

1. A temperature sensing device, comprising:
a resistor having a first terminal coupled to a voltage source; a temperature sensor having a first terminal coupled to a second terminal of the resistor and a second terminal of the temperature sensor being grounded, wherein resistance of the temperature sensor changes from a first resistance state to a second resistance state after temperature surrounding the temperature sensing device reaches a threshold temperature; a comparator having a first input and a second input, wherein the first input of the comparator is coupled to the second terminal of the resistor and the first terminal of the temperature sensor, and the second input of the comparator is coupled to a reference voltage, wherein the comparator generates an output based on resistance changes of the temperature sensor, indicating temperature changes for the temperature sensing device.