Short-circuit protection circuit for MOS (Metal Oxide Semiconductor) tube

• Main Author: WANG HANGFEI
• Format: Patent
• Language: Chinese; English
• Published: 29.12.2023
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

The utility model discloses an MOS tube short circuit protection circuit, which relates to the technical field of MOS tube protection, is connected behind a load of a constant voltage circuit, and comprises an MOS tube, a sampling module, an amplification module, a control module and a main control module, the drain electrode of the MOS tube is connected with the output end of the constant voltage circuit, and the source electrode of the MOS tube is connected with the sampling module; the sampling module is used for sampling the output voltage of the MOS tube to obtain a sampling signal; the amplification module is used for converting and amplifying the sampling signal and then outputting an amplified signal; the control module is used for controlling the on and off of the MOS tube according to the amplified signal; and the main control module is used for controlling whether the output end of the main control module outputs the PWM signal or not according to the size of the constant voltage signal. When the o