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Driver controller with AC-adapted and DC-adapted control modes

A control mode and driver technology, applied in the direction of output power conversion devices, high-efficiency power electronic conversion, electrical components, etc., can solve the problem of imperfect completion of smoothing capacitors with too small size of conversion rectifiers

Active Publication Date: 2016-08-31
INFINEON TECH AUSTRIA AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, some systems provide drives with power that is converted from AC to DC, but competing design constraints sometimes dictate that this conversion be done imperfectly, such as with rectifiers and relatively undersized smoothing capacitors

Method used

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  • Driver controller with AC-adapted and DC-adapted control modes
  • Driver controller with AC-adapted and DC-adapted control modes
  • Driver controller with AC-adapted and DC-adapted control modes

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] Example 1: A method of controlling a drive comprising: detecting whether an input is predominantly alternating current (AC) or predominantly direct current (DC); and controlling output current in an AC-adapted control mode in response to detecting that the input is predominantly AC , and the output current is controlled in a DC adaptation control mode in response to detecting that the input is predominantly DC.

example 2

[0046] Example 2: The method of Example 1, wherein detecting whether the input is predominantly AC or predominantly DC comprises: measuring a total range of voltage variation between a minimum voltage and a maximum voltage of the input; if the total range is greater than a selected threshold, determining whether the input is is predominantly AC; and if the total range is less than the selected threshold, then the input is determined to be predominantly DC.

example 3

[0047] Example 3: The method of any combination of Examples 1 and 2, wherein detecting whether the input is predominantly AC or predominantly DC comprises: determining whether a minimum voltage at the input is less than a selected base threshold; if the minimum voltage at the input is less than the selected base threshold, then determining the input as predominantly AC; and determining the input as predominantly DC if the minimum voltage of the input is greater than a selected base threshold.

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PUM

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Abstract

The invention relates to a driver controller with AC-adapted and DC-adapted control modes. Methods, devices, and integrated circuits are disclosed for a driver controller that determines whether an input is AC or DC and controls a driver in either an AC-adapted control mode or a DC-adapted control mode. An example method includes detecting whether an input is primarily AC or DC. The method further includes controlling an output current in an AC-adapted control mode in response to detecting that the input is primarily AC, and controlling the output current in a DC-adapted control mode in response to detecting that the input is primarily DC.

Description

technical field [0001] The present disclosure relates to electronic circuits and in particular to current drivers. Background technique [0002] Some driver circuit applications are designed to provide drive current, such as for groups of light emitting diodes (LEDs). The number of LEDs can vary depending on the particular application. The driver can control the current flowing through the LED chain, and the output voltage can be set by the number and forward voltage of the LEDs that make up the chain. In many applications it is desirable for the driver to deliver a constant average current (as opposed to eg a constant voltage) through the load when the load is switched on. Drivers may be incorporated in larger systems that may have mixed or ambiguous power requirements, especially when the system is designed with typical engineering trade-offs between competing design constraints including low cost, fast response, and small sized components. For example, some systems pro...

Claims

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Application Information

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IPC IPC(8): H02M1/10
CPCH02M1/10H02M1/0083H02M3/156H02M1/4291Y02B70/10
Inventor 弓小武M.赫富尔特
Owner INFINEON TECH AUSTRIA AG