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Active Current Sensing for High Voltage Switching Regulators

A voltage switching and current sensing technology, applied in the direction of adjusting electrical variables, measuring only current, control/regulating systems, etc., can solve the problems of accuracy loss, increased switching noise, decreased accuracy, etc., to reduce delay and increase adjustment. Resolution, effect of good measurement accuracy

Inactive Publication Date: 2016-02-17
MICROCHIP TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current conveyor must follow the voltage across the power switching transistor 200, causing significant loss of accuracy and measurement noise
As the transfer ratio of the DC / DC converter increases, switching noise increases and accuracy decreases

Method used

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  • Active Current Sensing for High Voltage Switching Regulators
  • Active Current Sensing for High Voltage Switching Regulators
  • Active Current Sensing for High Voltage Switching Regulators

Examples

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Embodiment Construction

[0018] Referring now to the drawings, details of certain example embodiments are schematically illustrated. Like elements in the drawings will be represented by the same numerals, and similar elements will be represented by the same numerals with different lowercase subscripts.

[0019] In a general sense, a power converter can be defined as a device that continuously converts one form of energy into another. Any storage or loss of energy within such power systems typically amounts to a process of energy conversion while such power systems are performing their conversion functions. There are many types of devices that can provide such functionality with varying degrees of cost, stability, complexity, and efficiency. Mechanisms for power conversion can take many basic forms, such as those that are mechanical, electrical, or chemical in nature. This article will focus on power converters that can perform energy conversion both electrically and dynamically, using a limited set ...

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Abstract

The present invention discloses a high voltage switching regulator with significantly reduced current sensing delay between the measurement of the input current and the generation of the sensed current value, while using current replicating and current conveyors to maintain current flow through the power transistors. Good accuracy of current. High sensing accuracy of input current ensures good load regulation, and low sensing latency ensures constant duty cycle over a wide range of output currents and high input / output voltage ratios. The current transmitter is used to transmit the high-side current value to the low-side control circuit (eg, pulse width modulation PWM control). The current transmitter is always on (eg, there is always some current flowing), thereby minimizing any current measurement delays. This is accomplished by dynamically biasing the current conveyor by draining a current equal to the sense current to ground. Thereby the balance of the current conveyor is ensured and the offset at the input of the current conveyor is minimized.

Description

[0001] Related patent applications [0002] This application asserts a claim against the authors of Philippe Deval, Philippe Gimmel, Marius Budaes, Daniel Leonescu, Terry Cleveland, and Co-owned U.S. Provisional Patent Application Serial No. 61 / 2010, entitled "Effective Current Sensing for High Voltage Switching Regulators," filed February 1, 2010, by Scott Dearborn 300,174; and is incorporated herein by reference for all purposes. technical field [0003] The present invention relates to switching regulator power supplies, and more particularly, the present invention relates to high resolution current measurement in switching regulator power supplies with minimal measurement delay. Background technique [0004] As higher efficiencies are sought for low power applications, more and more linear regulator solutions are being replaced by switching regulator solutions. However, a limitation of current technology switching regulators is usually limited to monitoring the VIN / VO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/158G01R19/00
CPCG01R19/0092H02M3/158H02M1/0009
Inventor 菲利普·德瓦尔菲利普·吉梅尔马里乌斯·布达斯达尼埃尔·莱奥内斯库特丽·克利夫兰斯科特·迪尔伯恩
Owner MICROCHIP TECH INC
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