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Switching converter with output current estimator circuit

A technology for output current and converter circuits, applied in the field of switching converters, which can solve problems such as low efficiency and output oscillation

Pending Publication Date: 2020-04-03
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some SIMO converter scenarios, inefficiencies and output oscillations may occur due to the components used as well as control issues

Method used

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  • Switching converter with output current estimator circuit
  • Switching converter with output current estimator circuit
  • Switching converter with output current estimator circuit

Examples

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Embodiment Construction

[0016] Disclosed herein is a switching converter topology involving a current monitor circuit configured to estimate the output current of the switching converter. The estimated output current is used, for example, to detect an overcurrent condition (eg, current above a threshold for more than a predetermined interval). In some examples, a current monitor circuit includes a switch "on" (conduction) detection stage, a current estimation stage, and a comparison stage. The conduction detection stage detects either the high-side switch "on" condition or the low-side switch "on" condition. The current estimation stage provides a scaled estimate of the current associated with the detected "on" condition of the switch. In some examples, the estimated current for the time interval is integrated using an integration stage. The comparison stage compares the current estimate from the current estimation stage or the integration stage with a reference value. If the estimated current val...

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PUM

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Abstract

The disclosure relates to a switching converter with an output current estimator circuit. A system (100) includes a switching converter circuit (102) and a monitoring circuit (130) coupled to the switching converter circuit (102). The monitoring circuit (130) includes a current estimation circuit (132) configured to estimate an output current of the switching converter circuit (102). The monitoring circuit (132) also includes a compare circuit (134) configured to compare the estimated average output current with a threshold, wherein the compare circuit is configured to output an alert signal in response to the estimated output current being greater than the threshold.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Application No. 62 / 736,583, filed September 26, 2018, which is incorporated herein by reference. technical field [0003] The present disclosure relates to circuits, and more particularly, to a switching converter with an output current estimator circuit. Background technique [0004] Power supplies and power converters are used in a variety of electronic systems. Electrical power is typically transmitted over long distances as an alternating current (AC) signal. The AC signal is divided and metered as needed for each business or home location, and is often converted to direct current (DC) for use with each electronic device or component. Modern electronic systems often employ devices or components designed to operate with different DC voltages. Therefore, such systems require different DC-DC converters or DC-DC converters that support a wide range of output volt...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02M3/158G01R31/54G01R19/00
CPCH02M3/156H02M3/158G01R19/0092H02M3/1557H02M1/009H02M1/0009H03K5/24
Inventor 阿列尔·达里奥·莫克特苏马哈桑·波亚·福尔加尼-扎德斯里纳特·霍苏尔
Owner TEXAS INSTR INC