The principle of DC power module overload protection is implemented through circuit design and control algorithms. Its basic idea is to limit and protect the output current by controlling the working state and output characteristics of the circuit when the system is overloaded.
Specifically, the overload protection of DC power modules mainly includes two aspects: one is current protection, which controls the magnitude and stability of the output current; The second is temperature protection, which controls the internal temperature of the power supply to prevent overheating and damage to electronic components.
In terms of current protection, the current feedback circuit is usually used to monitor changes in output current. When the current exceeds a certain limit value, the switching state of the circuit is adjusted through PWM to reduce the magnitude of the output current. This can ensure that the output current of the power supply is always within a safe range, while also ensuring the stability of the output current, avoiding short circuits or other faults in the power supply caused by overload.
In terms of temperature protection, temperature sensors are usually used to monitor temperature changes inside the power supply. When the temperature rises to a certain level, the circuit will automatically cut off the output voltage to prevent overheating and damage to electronic components. Meanwhile, by reducing the output power of the power supply and adopting heat dissipation measures, the operating temperature of the power supply can be lowered, thereby improving its reliability and lifespan.
In general, the overload protection of DC power modules is mainly achieved by controlling the working state and output characteristics of the circuit to limit and protect the output current and temperature. This not only ensures the safety and reliability of the power supply, but also improves its working efficiency and service life, providing more reliable guarantees for the stable operation of various electronic devices.
