TRANSISTOR BODY CONTROL CIRCUIT AND AN INTEGRATED CIRCUIT

摘要

An integrated circuit comprises a transistor body control circuit for controlling a body of a bidirectional power transistor. The transistor body control circuit comprises switches connected between a body terminal and a first current terminal, with a control terminal for controlling the current flowing through the switch.;The control terminal of the switch is connected to alternating current, AC capacitive voltage divider. The AC capacitive voltage dividers are connected to the control terminals and arranged to control the switches to switch the voltage of the body terminal as a function of the voltage between the first current terminal and the second current terminal. The integrated circuit further comprises a bi-directional power transistor connected to the transistor body control circuit.

主权项

1. A transistor body control circuit for controlling a body of a bidirectional power transistor, comprising:
a first switch connectable between a body terminal and a first current terminal of the bidirectional power transistor, comprising a control terminal for controlling the current flowing through the first switch; a second switch connectable between the body terminal and a second current terminal of the bidirectional power transistor, comprising a control terminal for controlling the current flowing through the second switch; the control terminal of the first switch being connected to a first alternating current, AC capacitive voltage divider and the control terminal of the second switch being connected to a second AC capacitive voltage divider; said AC capacitive voltage dividers being connectable to the first control terminal and the second current terminal and arranged to control the first switch and the second switch to switch the voltage of the body terminal to the first current terminal or the second current terminal as a function of the voltage between the first current terminal and the second current terminal.