Driving circuit for a switching transistor and a driving device including the same

• Main Authors: Ouyang, Huafen, Li, Hualiang, Jin, Dongxin
• Format: Patent
• Language: English
• Published: 25.06.2024
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

The present invention provides a driving circuit for a switching transistor and a driving device including the same. The driving circuit includes: a power amplifier, including a first power transistor and a second power transistor that are connected between a first direct current voltage terminal and a second direct current voltage terminal and are arranged in a push-pull circuit; a first voltage regulating device, connected between an input terminal of the power amplifier and a control terminal of the first power transistor; a third power transistor, connected between an output terminal of the power amplifier and the second direct current voltage terminal or a grounding terminal; a first voltage dividing device, connected between the input terminal and the output terminal of the power amplifier; and a transistor control circuit, configured to: control the third power transistor to be turned on when the switching transistor is located in a short-circuit path, and control the third power transistor to be turned off when the switching transistor is controlled to be turned on and is not located in the short-circuit path. The driving circuit of the present invention reduces the power consumption of the switching transistor and extends the time for short-circuit protection.