OLT equipment temperature overheating protection circuit and method

• Main Authors: MAI HAIXIANG, GUO JIGANG, QIN WENFENG
• Format: Patent
• Language: Chinese; English
• Published: 01.04.2022
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention discloses an OLT (Optical Line Terminal) equipment temperature overheating protection circuit and method. The protection circuit comprises a CPU (Central Processing Unit), a first temperature chip, a second temperature chip, a CPLD (Complex Programmable Logic Device) module, a first fan system, a second fan system and a system power supply, the CPLD module serves as I2C main equipment to read the temperature value of the second temperature chip, the temperature value is compared with an internal preset target value, when the read value is larger than the target value, it is judged that the system is overheated, and the CPLD module will control a system power source to be powered off and meanwhile control a second fan system to work for cooling; when the read value is smaller than the target value, the CPLD module can control the system power supply to restore power supply and meanwhile control the second fan system to stop working; and meanwhile, the CPLD module can inform the CPU that the overh