Abnormality detection circuit and switching tube driving device

• Main Authors: HUANG JINGSONG, ZHAN WANXING, HONG XIANZHEN
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2022
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING; TESTING

The utility model discloses an abnormity detection circuit and a switch tube driving device, the switch tube driving device comprises a master controller and a driver, the master controller outputs a control signal, and the driver drives the switch tube; the anomaly detection circuit comprises a first detection unit and a second detection unit. The first detection unit is connected with the driver and outputs a level signal output by the driver in an inverted mode. The second detection unit is connected with the first detection unit and transmits a level signal output by the first detection unit to the main controller, and comprises a level clamping device for clamping the input end of the second detection unit to a second level signal when the second detection unit is not connected to the first detection unit; the driver sends out a first level signal when the switching tube is abnormal, and the master controller judges abnormality when the input end of the second detection unit has a second level signal. Th