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Current limiting in response to an amount related to the ratio of the output voltage divided by the input voltage

A technology of input current and output voltage, which is applied in the direction of output power conversion device, adjustment of electric variable, conversion of DC power input to DC power output, etc. It can solve the problem that cannot be limited, limited to a definable or predictable level And other issues

Active Publication Date: 2019-01-18
INTERSIL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, while overcurrent protection circuitry for a boost converter can limit the converter switching current to a definable level during an overcurrent condition, the overcurrent protection circuitry cannot Limits the converter output (load) current to a definable or predictable level during current conditions
Despite the action of the overcurrent protection circuitry, the fact that the overcurrent protection circuitry cannot limit the converter output (load) current to a definable or predictable level during an overcurrent condition may allow damage occurs during an overcurrent condition

Method used

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  • Current limiting in response to an amount related to the ratio of the output voltage divided by the input voltage
  • Current limiting in response to an amount related to the ratio of the output voltage divided by the input voltage
  • Current limiting in response to an amount related to the ratio of the output voltage divided by the input voltage

Examples

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Embodiment Construction

[0073] figure 1 is a schematic diagram of a boost converter power supply 10 and a load 12 powered by the power supply according to an embodiment.

[0074] The power supply 10 is configured to respond to an input voltage V on a node 16 in a normal operating mode in And produce an output voltage on a node 14, for example, a regulated output voltage V out , and includes an inductor 18 of a filter with an inductance L, a unidirectional current member (here a diode) 20, a capacitor 22 of a filter with a capacitance C, a controller of a power supply 24 , and a reference node (here, a ground node) 26 .

[0075] The controller 24 of the power supply includes a device configured to generate input, switching, output and load current I in , I switch , I out and I load or the switching regulator 28 that causes it to generate, and contains a configuration configured to limit the I during a current-limited mode switch and thus limit I in to a current-limited reference CL ref set in...

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Abstract

In one embodiment, a controller of a power supply includes a switching regulator and a current limiter. The switching regulator is configured to generate an input current such that an output voltage is generated in response to the input current and an input voltage, and the current limiter is configured to respond to a A proportional amount to limit the input current. For example, one embodiment of the controller for such a power supply can limit the input current from a power supply by limiting the input current in response to an amount related to the ratio of the output voltage to the input voltage (eg, boost ratio). The output of the device or the load current to a set level.

Description

[0001] This application claims priority to US Provisional Patent Application Serial No. 61 / 721,790 filed November 2, 2012, which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to the limitation of electric current. Background technique [0003] Power supplies, such as buck converters and boost converters, are used in many products such as computers and phones. In order to prevent the power supply from damaging itself or components in the power supply that supply power, the power supply may include over-current-protection (OCP) circuitry that prevents one or more currents ( For example, the load (supply output current and supply switch current) exceeds individual safe levels. [0004] During an overcurrent condition, although the power supply's overcurrent protection circuitry can limit such current to a definable, or predictable, level, the overcurrent protection circuitry cannot limit one or more other This curr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32
CPCG05F1/10H02M3/156
Inventor 马克·伊森·丹刚鲁奇·帕里克
Owner INTERSIL INC