Circuit composition and advantages and disadvantages of over-temperature protection circuit

Regarding the knowledge of over-temperature protection circuit, when the temperature is higher than the set protection point, the module output will be shut down, and the module will be restarted after the temperature recovers. The following is the circuit composition and advantages and disadvantages of the over-temperature protection circuit. Interested friends can refer to it.

Over temperature protection circuit

1. Overview (circuit category and main functions)

This circuit is an over-temperature protection circuit. When the temperature is higher than the set protection point, the module output is turned off, and the module is automatically turned on when the temperature recovers.

2. Circuit composition (schematic diagram)

3. Working principle (main functions, performance indicators and implementation principles)

The voltage regulator tube provides 5V voltage to U103MAX6501. When the temperature is normal, the five pins of U103 output high level. When the temperature exceeds the protection point, the five pins of U103 output low level. When the temperature recovers, the five pins of U103 output high level.

4. Advantages and disadvantages of the circuit

Advantages: simple circuit and high accuracy.

Disadvantages: higher cost.

5. Precautions for use

1) When the 3rd and 1st pins of MAX6501 are connected, the hysteresis temperature is 10℃; when the 3rd pin is connected to the ground, the hysteresis temperature is 2℃.

2) The supply voltage of MAX6501 cannot exceed 7V, otherwise it will be damaged.

3) The MAX6501 must be placed near the hottest part.