Level Translator Circuit, Driving Circuit for Driving High-Voltage Device and Method Thereof

摘要

The present invention provides a level translator circuit, a driving circuit for driving a high-voltage device and a corresponding method. The driving circuit for driving a high-voltage device comprises: a zener diode whose cathode is connected to a high-voltage power supply voltage and whose anode is connected to a ground potential of a low-voltage domain through a resistor; a high-voltage PMOS transistor whose gate is connected to an anode of the resistor, whose drain is connected to the ground potential of the low-voltage domain, and whose source is operable to supply a ground potential of a high-voltage domain; a level translator operable to convert a first signal in the low-voltage domain as received to a second signal in the high-voltage domain and output the second signal; and a low-voltage driving circuit operable to receive the second signal and adapt the second signal as a third signal which can drive the high-voltage device. The present invention allows for use of the low-voltage device to drive the high-voltage device to achieve the drive of the high-voltage device in a simple and efficient manner.

主权项

1. A driving circuit for driving a high-voltage device, comprising:
a zener diode whose cathode is connected to a high-voltage power supply voltage and whose anode is connected to a ground potential of a low-voltage domain through a resistor; a high-voltage PMOS transistor whose gate is connected to an anode of the resistor, whose drain is connected to the ground potential of the low-voltage domain, and whose source is operable to supply a ground potential of a high-voltage domain; a level translator whose working voltage terminal is connected to the high-voltage power supply voltage, whose first grounded terminal is connected to the ground potential of the low-voltage domain, and whose second grounded terminal is connected to the ground potential of the high-voltage domain, the level translator being operable to convert a first signal in the low-voltage domain as received to a second signal in the high-voltage domain and output the second signal; and a low-voltage driving circuit connected between the high-voltage power supply voltage and the ground potential of the high-voltage domain, and being operable to receive the second signal and adapt the second signal as a third signal which can drive the high-voltage device.