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Isolated gate driver circuit for power switching devices

A gate driver, power switch technology, applied in electronic switches, circuits, electrical components, etc., can solve problems such as damage to power switches, power supply voltage fluctuations, overheating, etc.

Inactive Publication Date: 2012-04-25
MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Breakdown loss of the power supply, which can cause fluctuations in the supply voltage, and / or cause overheating, which will damage the power switch

Method used

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  • Isolated gate driver circuit for power switching devices
  • Isolated gate driver circuit for power switching devices
  • Isolated gate driver circuit for power switching devices

Examples

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Embodiment Construction

[0053] Various embodiments of the present invention will be described below. The description that follows provides specific details for a thorough understanding of these embodiments. It will be understood by those skilled in the art that the present invention may be practiced without some of the described details. Also, some well-known structures or functions may not be shown or described in detail to avoid unnecessarily obscuring the related description of the various embodiments.

[0054] Terms used in the following description, even when used in conjunction with detailed descriptions of certain specific embodiments of the invention, are to be interpreted in their broadest reasonable manner. Certain terms may be emphasized below; however, terms that are to be interpreted in a restricted manner will be openly and explicitly defined in the Detailed Description.

[0055] Embodiments of isolated gate driver circuits for driving high-side and low-side switching devices of bridg...

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PUM

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Abstract

Embodiments of isolated gate driver circuits are disclosed for driving high- and low-side switching devices for half- and full-bridge power converter topology. Disclosed circuits provide sufficient dead-time, operate over a wide range of duty cycles, and require a single power supply (V<cc>). Typical applications for such circuits include cold cathode fluorescent lamp (CCFL) inverters that are powered by a high voltage DC rail.

Description

technical field [0001] The present invention generally relates to an integrated circuit gate driver for driving a MOS-gated power device, and in particular to an IGBT (Insulated Gate Bipolar Transistor) device that prevents simultaneous opening of the high-voltage side and the low-voltage side drive. Background technique [0002] Power switching devices with capacitive gate control inputs such as MOSFETs, insulated gate bipolar transistors (IGBTs) and MOS controlled thyristors (MCTs) are widely used due to their superior performance at high switching frequencies. In electronic switching applications such as ON / OFF load control, switching amplifiers, motor drives, switch mode power supplies (SMPS) and cycloconverters. These devices are turned on by charging the gate capacitance to some suitable relatively low voltage value, and turned off by discharging the gate capacitance. Information about when to turn on and off the power switching device is passed to a gate driver circ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/567H02M1/08H02M3/155
CPCH02M1/08H03K17/691H03K17/04123
Inventor 金相顺陈伟
Owner MONOLITHIC POWER SYST