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Overvoltage protection circuit, overvoltage protection method, and gate drive integrated circuit

A technology for protecting circuits and integrated circuits, applied in the field of overvoltage protection circuits and gate drive integrated circuits, can solve problems such as load damage, and achieve the effect of simple structure

Active Publication Date: 2018-09-25
UPI SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The load can therefore be damaged by high voltage stress

Method used

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  • Overvoltage protection circuit, overvoltage protection method, and gate drive integrated circuit
  • Overvoltage protection circuit, overvoltage protection method, and gate drive integrated circuit
  • Overvoltage protection circuit, overvoltage protection method, and gate drive integrated circuit

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Embodiment Construction

[0070] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In addition, elements / members with the same or similar numbers used in the drawings and the embodiments are used to represent the same or similar parts.

[0071] In the following embodiments, when an element is referred to as being “connected” or “coupled” to another element, it may be directly connected or coupled to the other element, or there may be intervening elements. The term "circuit" or "unit" may refer to at least one element or a plurality of elements, or elements that are actively and / or passively coupled together to provide a suitable function. The term "signal" may refer to at least one current, voltage, load, temperature, data or other signal.

[0072] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings. In addition, ele...

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Abstract

The present invention provides an overvoltage protection circuit, an overvoltage protection method and a gate driving integrated circuit. The overvoltage protection method is used for the overvoltage protection circuit. The overvoltage protection circuit is coupled to a first switch which has a control end. The overvoltage protection method comprises the following steps: comparing a first voltage preset value with an operating voltage to generate a first enable signal; and comparing a voltage of the control end of the first switch with a reference voltage when the first enable signal is generated, so as to determine whether the overvoltage protection circuit executes an overvoltage protection operation, thereby avoiding damages to a load caused by high voltage stress.

Description

technical field [0001] The invention relates to an overvoltage protection technology, in particular to an overvoltage protection circuit, an overvoltage protection method and a gate drive integrated circuit. Background technique [0002] figure 1 It is an application schematic diagram of an existing power conversion circuit. The power conversion circuit 100 includes a gate driving circuit 110 and an output stage 120 . The gate driving circuit 110 switches the first switch Q1 and the second switch Q2 of the output stage 120 according to the pulse width modulation signal PWM, so that the input voltage VIN is converted into an output voltage VOUT and supplied to the load 130 . [0003] The load 130 is a central processing unit or a graphics processing unit, and its power source is the output voltage VOUT. Assume that the power conversion circuit 100 does not have an overvoltage protection circuit for the output stage 120 , the input voltage VIN is 5V or 12V, and the first sw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/20H02M1/088
Inventor 徐正青
Owner UPI SEMICON CORP
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