Power switch driving circuits and power converters thereof

摘要

In one embodiment, a power switch driving circuit can include: (i) an upper switch having a first power terminal coupled to a voltage source, and a second power terminal coupled to a driving signal; (ii) a lower switch having a first power terminal coupled to the driving signal, and a second power terminal coupled to a first voltage level, where the first voltage level is higher than a first ground potential; (iii) an upper switch driving sub circuit configured to receive a control signal, and to drive the upper switch in response thereto; and (iii) a lower switch driving sub circuit configured to receive the control signal, and to drive the lower switch in response thereto, where the upper and lower switch driving sub circuits are coupled to a second ground potential.

主权项

1. A circuit, comprising:
a) an upper switch having a first power terminal coupled to a voltage source, and a second power terminal coupled to a driving signal; b) a lower switch having a first power terminal coupled to said driving signal, and a second power terminal coupled to a first voltage level, wherein said first voltage level is higher than a first ground potential; c) an upper switch driving sub circuit configured to receive a control signal, and to drive said upper switch in response thereto; d) a lower switch driving sub circuit configured to receive said control signal, and to drive said lower switch in response thereto; and e) a power switch in a power converter, said power switch having a first power terminal coupled to a primary side of a four-terminal transformer, a control terminal coupled to said driving signal, and a second power terminal coupled to said first ground potential.