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Limiting average current in a peak-controlled boost converter

A boost converter, the technology of average current, applied in the emergency protection circuit device for limiting overcurrent/overvoltage, the conversion device of output power, the conversion of DC power input to DC power output, etc., can solve the peak inductor Problems such as large current error, to achieve the effect of eliminating shortcomings and problems

Inactive Publication Date: 2020-06-09
CIRRUS LOGIC INT SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in many systems, the error between peak and average inductor current can be large, and variations in the inductor can present significant challenges in determining an appropriate peak current limit

Method used

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  • Limiting average current in a peak-controlled boost converter
  • Limiting average current in a peak-controlled boost converter
  • Limiting average current in a peak-controlled boost converter

Examples

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Embodiment Construction

[0018] figure 1 An example personal audio device 1 is shown according to an embodiment of the present disclosure. figure 1 Personal audio device 1 is depicted coupled to headphones 3 in the form of a pair of earbud speakers 8A and 8B. figure 1 The headphones 3 depicted in are examples only, and it should be understood that the personal audio device 1 may be used in connection with a variety of audio transducers including, but not limited to, headphones, earbuds, in-ear headphones, and external speakers. The plug 4 can be used to connect the earphone 3 to the electrical terminals of the personal audio device 1 . The personal audio device 1 may use the touch screen 2 to provide a display to the user and receive user input, or alternatively, a standard liquid crystal display (LCD) may be provided with various buttons, sliders and / or on the front of the personal audio device 1 and / or Or a combination of dials on the side. Such as figure 1 As shown, the personal audio device 1 ...

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Abstract

A method may include monitoring a current through a power inductor of a boost converter and detecting when a mathematical integral of a difference between the current as monitored and a desired average current for the power inductor is equal to zero. Another method may include in a first mode of operation of a boost converter, controlling switching behavior of switches of the boost converter to regulate an output voltage generated by the boost converter and in a second mode of operation of the boost converter, controlling switching behavior of switches of the boost converter to regulate an input current received by the boost converter. Another method may include monitoring a current through a power inductor of a boost converter and detecting when the current as monitored exceeds a maximumcurrent for the power inductor.

Description

technical field [0001] The present disclosure relates generally to circuits for electronic devices, including but not limited to personal audio devices such as wireless phones and media players, and more particularly to limited average current in peak controlled boost converters. Background technique [0002] Personal audio devices, including wireless phones such as mobile / cellular phones, cordless phones, mp3 players and other consumer audio devices, are in widespread use. Such personal audio equipment may include circuitry for driving a pair of headphones or one or more speakers. Such circuits typically include speaker drivers including power amplifiers for driving audio output signals to headphones or speakers. Typically, a power converter is used to provide a supply voltage to a power amplifier to amplify the signal to drive speakers, headphones, or other transducers. A switching power converter is an electronic circuit that converts power from one direct current (DC) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M3/157H02M1/00
CPCH02M3/157H02M3/158G05F1/46H02M1/0009H02M3/156H02H9/02
Inventor 埃里克·J·金埃里克·B·史密斯
Owner CIRRUS LOGIC INT SEMICON
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