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Current detection circuit and method

A current detection circuit and current detection technology, applied in the direction of measuring current/voltage, voltage/current isolation, measuring devices, etc., can solve problems such as the influence of current detection accuracy

Active Publication Date: 2019-04-30
东莞市长工微电子有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the reference device is placed in one location, such as the main center of the MOSFET, the sensing accuracy of the current must be affected

Method used

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  • Current detection circuit and method

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] refer to figure 1 ,Such as figure 1 As shown, a current detection circuit and method, including a switching converter; the switching converter includes:

[0042] A high-side main power MOSFET coupled between the input voltage and the switching node;

[0043] an output inductor coupled between the switch node and the output voltage;

[0044] Two or more current detection sections to detect the current of each section;

[0045] Two or several current detection output circuits, so that the power devices in each area have the same current detection;

[0046]The two or more current detection...

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Abstract

The invention discloses a current detection circuit and method. The current detection circuit comprises a switching converter; the switching converter comprises a high-end main power MOSFET coupled between an input voltage and a switching node; an output inductor coupled between a switch node and an output voltage; two or more than two current detection parts for detecting the current of each part; and two or more current detection output circuits which enable the power devices in each area to have the same current detection. According to the current detection circuit and method, multi-regioncurrents of an integrated power supply system can be accurately detected.

Description

technical field [0001] The invention relates to current detection of a power semiconductor device, in particular to a multi-region accurate current detection circuit and method suitable for an integrated power supply system. Background technique [0002] Currently, power supplies or voltage regulators (VRs) are widely used in various electronic systems to provide a constant voltage level required by a load and a current required by the load. In addition, modern power electronic systems also need to supply current to a wide range of components, from relatively high peak currents to very low currents in light-load operation modes. In all power supply and converter designs, one of the key technologies is how to accurately and timely obtain current signals for current control and monitoring. [0003] For example, for a hypothetical server system, increasingly accurate current sense (CS) and power telemetry data will need to be used in system-level power and thermal management a...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R15/14
CPCG01R15/14G01R19/00
Inventor 李学宁
Owner 东莞市长工微电子有限公司