Driver chip and driving method of a half bridge circuit
AssigneeNuvoton Technology Corporation
InventorYU-CHI CHANG
Life of this patent
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Abstract
A driver chip includes a high side input terminal, a pulse generator, a level shift, a current detector, a high side output controller, and a high side output terminal. The high side input terminal receives the high side input signal and the pulse generator transfers the high side input signal into the rise pulse signal and the fall pulse signal. The current detector detects the first current and the second current flowing through the level shift, and the high side output controller generates the high side output signal. The high side output terminal controls the switching of the high side transistor by the high side output signal.
Claims17
A driver chip of a half bridge circuit for controlling switching of a high side transistor and a low side transistor, comprising:
- a high side input terminal receiving a high side input signal;
- a pulse generator electrically connected to the high side input terminal and transferring a rising edge and a falling edge of the high side input signal into a rise pulse signal and a fall pulse signal;
- a level shift electrically connected to the pulse generator and generating a first current and a second current according to the rise pulse signal and the fall pulse signal respectively;
- a current detector electrically connected to the level shift and detecting the first current and the second current for generating a rise current signal and a fall current signal respectively;
- a high side output controller electrically connected the current detector and generating a high side output signal according to the rise current signal and the fall current signal;
- and
- a high side output terminal, electrically connected to the high side output controller and the high side transistor and outputting the high side output signal to control the switching of the high side transistor.
A driver chip of a half bridge circuit for controlling switching of a high side transistor and a low side transistor, comprising:
- a high side input terminal, receiving a high side input signal;
- a pulse generator, electrically connected to the high side input terminal and transferring the rising edge and the falling edge of the high side input signal into a rise pulse signal and a fall pulse signal;
- single level shift, electrically connected to the pulse generator and configured to transmit the rise pulse signal and the fall pulse signal;
- a pulse detector, electrically connected to the level shift and detecting the rise pulse signal and the fall pulse signal outputted by the level shift;
- a high side output controller, electrically connected to the pulse detector and generating a high side output signal according to a sequence of the rise pulse signal and the fall pulse signal, or pulse widths of the rise pulse signal and the fall pulse signal;
- and
- a high side output terminal, electrically connected to the high side output controller and the high side transistor and outputting the high side output signal to control the switching of the high side transistor.
A driving method of a half bridge circuit for controlling switching of a high side transistor and a low side transistor, comprising:
- receiving a high side input signal;
- generating a rise pulse signal and a fall pulse signal according to the high side input signal and transmitting the rise pulse signal and the fall pulse signal to a level shift;
- detecting a first current and a second current which flow through the level shift and generating a rise current signal and a fall current signal according to the first current and the second current respectively;
- generating a high side output signal according to the rise current signal and the fall current signal;
- and
- transmitting the high side output signal to control the switching of the high side transistor.
Dependencies are inferred from the claim text.