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Protective member, system and method

A technology of protection devices and gate drivers, which is applied in the direction of electrical components, high-efficiency power electronic conversion, output power conversion devices, etc.

Active Publication Date: 2014-08-20
FAIRCHILD SEMICON SUZHOU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach requires the use of relatively large capacitors, which require additional cost and physical space to implement

Method used

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  • Protective member, system and method
  • Protective member, system and method
  • Protective member, system and method

Examples

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Embodiment Construction

[0030] figure 1 A block diagram of a power protection system 100 consistent with various exemplary embodiments of the invention is shown. figure 1 The illustrated power protection system 100 may be included with or form part of a general purpose or custom integrated circuit (IC) (e.g., a semiconductor integrated circuit chip, system on chip (SoC), etc.) . The following description will use the example of an automotive starter coil, however, it should be understood from the outset that this is only a non-limiting example and that the teachings of the present invention can be utilized in any system where uninterrupted switch conduction is expected or required. Additionally, the following detailed description will describe certain specific types of switching circuits, such as FET, BJT, IGBT, SiC, etc., however, it should be understood that these switch types are interchangeable for certain applications (as understood by those skilled in the art) ), and thus the invention is not...

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Abstract

Devices and methods provide a protection device for maintaining a steady output on a gate driver terminal despite fluctuations in a power supply, the protection device including low voltage detection circuitry configured to monitor the power supply and detect fluctuations in the power supply; and gate isolation circuitry configured to isolate the gate driver terminal from the power supply if the low voltage detection circuitry detects a fluctuation in the power supply, wherein a voltage of the gate driver terminal is maintained within a preselected range when the gate is isolated.

Description

technical field [0001] The present invention relates to a power protection system, in particular to a gate protection circuit for high voltage applications. Background technique [0002] In automotive electronic systems, the ignition coil typically induces hundreds of volts to drive the starter motor. The ignition coil is typically controlled by a high voltage switch (eg, IGBT, MOSFET, etc.) to couple the ignition coil to the battery voltage. If there is a momentary drop in battery voltage, the momentary drop can cause the gate of the high voltage switch to discharge and open, which in turn can cause a floating high voltage condition at the ignition coil. Floating high voltage conditions often cause sparks from the ignition coil primary to the ignition coil secondary, which can hazard and / or damage nearby electronic components. Conventional solutions to this sparking problem include using a large capacitor to act essentially as a battery, and keeping the high voltage switc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/32H02M1/00
CPCH02M2001/0022H02M2001/0096H02M3/1588H02M3/156Y02B70/10H02M1/0022H02M1/0096
Inventor 詹姆斯·E·吉尔伯格约而根·批安卡
Owner FAIRCHILD SEMICON SUZHOU