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Slew control for high-side switch

A high-side switch and rotation speed technology, applied in electronic switches, output power conversion devices, conversion equipment without intermediate conversion to AC, etc., can solve problems such as needs

Active Publication Date: 2019-09-20
MICROCHIP TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Controlling the slew rate of the high-side switch FET 16 with the current limiter 34 results in the need for a large charge pump 2

Method used

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  • Slew control for high-side switch
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  • Slew control for high-side switch

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Embodiment Construction

[0018] Before any embodiment of the invention is explained in detail, it is to be understood that the invention in its application is not limited to the details of construction and the arrangement of parts set forth in the following description or shown in the following drawings. The invention is capable of other embodiments and of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of "including," "comprising" or "having" and variations thereof herein is intended to cover the items listed thereafter and their equivalents as well as additional items. Unless otherwise indicated or limited, the terms "mount", "connect", "support" and "coupling" and variations thereof are used broadly and encompass both direct and indirect mounting, connection, support and coupling. Furthermore, "connected" and "coupled" are not limited to p...

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PUM

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Abstract

The present invention discloses a circuit for slew rate control for a high-side switch. The circuit comprises a sample and level-shift circuit. The sample and level-shift circuit is connected to the high-side switch. The circuit further comprises a sampling capacitor, and the sampling capacitor is configured to sample an input voltage corresponding to the sample and level-shift circuit. Additionally, the circuit includes a charge-limiting circuit. The sampling capacitor is configured to charge a gate capacitance of the high-side switch. The charge-limiting circuit is configured to limit a rate of charge transferred to the gate capacitance of the high-side switch per unit of time.

Description

technical field [0001] The present disclosure relates to transistor-based switches, and more particularly, to slew control for high-side switches. [0002] Apply for priority [0003] This application claims priority from Indian application 201711012738 filed on April 10, 2017, the content of which is hereby incorporated in its entirety. Background technique [0004] High side switches can be used to drive a variety of loads, and thus can be used in many different applications. Typical systems and methods for driving high-side switches utilize charge pumps. Charge pumps are DC to DC converters that use capacitors as energy storage elements to generate higher or lower voltage power supplies. With regard to the high side switch, in addition to supplying the DC current used to drive the high side switch, a charge pump is also relied upon to supply other circuit components such as amplifiers. This approach requires the use of large capacitors within the charge pump to supply...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/06H03K17/16
CPCH03K17/063H03K17/163H03K2217/0063H02M1/08H02M1/0029H02M1/0006H02M1/096H02M3/07
Inventor S·拉玛琳格姆U·卡索斯
Owner MICROCHIP TECH INC