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High Speed ​​Tracking Bidirectional Current Sensing System

A technology for tracking current and sensing systems, which is applied in control/regulation systems, electrical components, circuit devices, etc., and can solve problems such as inability to collect or obtain current

Active Publication Date: 2019-07-23
INFINEON TECH AUSTRIA AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of op amps results in tracking current sense circuits with a lower bound speed, and thus may not be able to sink or source current at the speed sometimes required by modern technologies / systems

Method used

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  • High Speed ​​Tracking Bidirectional Current Sensing System
  • High Speed ​​Tracking Bidirectional Current Sensing System
  • High Speed ​​Tracking Bidirectional Current Sensing System

Examples

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Embodiment Construction

[0023] Some power systems rely on linear sense amplifier (“LSA”) based current sensing systems to perform current tracking techniques. One disadvantage of LSA-based current sensing systems is that LSAs can be unstable in high-speed power systems. That is, some LSA-based current sensing systems may have a "residual offset" (eg, the amount of time after performing a sensing operation that the overall system needs to wait before continuing with other non-sensing operations) and / or a large stable schedule. Some power systems, such as step-down or "buck" converters, perform fast switching and / or high / low duty cycle operation, and have very useful current sensing techniques available for LSA-based current sensing systems. less time. Accordingly, an LSA-based current sensing system with residual offset and / or large settling time may become unstable and / or end performing sensing operations during the time the power system has been available for sensing. Even if the LSA-based curren...

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PUM

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Abstract

The present invention relates to high speed tracking bidirectional current sensing systems. A tracking current sensing system is described that includes a current source and a current control device. The current source alternatively and substantially replicates the first current flowing through the first switch and the second current flowing through the second switch. The current control device configures the current source to alternate between replicating the first current and the second current.

Description

technical field [0001] The present disclosure generally relates to current sensing techniques in electronic circuits. Background technique [0002] Tracking current sensing circuits generally provide tracking current and can be used in applications such as DC-DC converters for servers and mobile computer applications. Conventional tracking current sensing circuits often include operational amplifiers that have limited slew rates and limited bandwidth due to capacitance introduced for stability. The use of operational amplifiers results in tracking current sensing circuits with a lower limit speed, and thus may not be able to sink or source current at the speed sometimes required by modern technologies / systems. Contents of the invention [0003] In general, this disclosure describes techniques and circuits for improving the speed, bandwidth, and stability of tracking current sensing systems. Some of the techniques and circuits described herein enable a tracking current se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/158
CPCH02M3/1584H02J7/34H02M3/1586G05F3/267
Inventor K.诺林A.萨姆布科
Owner INFINEON TECH AUSTRIA AG