US 2016/0254675 A1Published application

Switching module

AssigneeNXP USA, Inc.

InventorsAlexander Petrovich SOLDATOV, Vasily Alekseyevich SYNGAEVSKIY, Gennady Mihaylovich VYDOLOB

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Abstract

A switching module comprising at least one current sense component. The at least one current sense component is arranged to generate a first phase sense current based at least partly on a received output signal of the at least one differential amplifier when the first cross-coupling component is configured to operably couple the differential inputs of the at least one differential amplifier to the output node of the at least one power switching device and the current sense feedback node with a first polarity, generate a second phase sense current based at least partly on a received output signal of the at least one differential amplifier when the first cross-coupling component is configured to operably couple the differential inputs of the at least one differential amplifier to the output node of the at least one power switching device and the current sense feedback node with a second polarity, and output a combined sense current based at least partly on a combination of the first phase sense current and the second phase sense current.

Claims20

Dependent claims

A switching module, comprising:

at least one power switching device arranged to output from an output node thereof a load current for the switching module, and
at least one current sense component arranged to generate at least one current sense signal for outputting by the switching module representative of the load current;
the at least one current sense component comprising:
at least one differential amplifier comprising differential inputs arranged to be operably coupled to the output node of the at least one power switching device and a current sense feedback node, and an output arranged to output a signal representative of the load current output by the at least one power switching device;
and
a sense current generation component arranged to receive a signal output by the at least one differential amplifier and generate a sense current based at least partly thereon;
the at least one current sense component further comprises a first cross-coupling component controllable to alternate a polarity with which the differential inputs of the at least one differential amplifier are operably coupled to the output node of the at least one power switching device and the current sense feedback node;
and
which at least one sense current generation component is arranged to:
generate a first phase sense current based at least partly on a received output signal of the at least one differential amplifier when the first cross-coupling component is configured to operably couple the differential inputs of the at least one differential amplifier to the output node of the at least one power switching device and the current sense feedback node with a first polarity;
generate a second phase sense current based at least partly on a received output signal of the at least one differential amplifier when the first cross-coupling component is configured to operably couple the differential inputs of the at least one differential amplifier to the output node of the at least one power switching device and the current sense feedback node with a second polarity;
and
output a combined sense current based at least partly on a combination of the first phase sense current and the second phase sense current.

10 more elements

A method of generating a current sense signal for outputting by a switching module, the method comprising:

generating a first phase sense current based at least partly on an output signal received from a differential amplifier when differential inputs of the differential amplifier are operably coupled with a first polarity to an output node of a power switching device of the switching module and a current sense feedback node, the output signal of the differential amplifier being representative of the load current output by the at least one power switching device;
generating a second phase sense current based at least partly on an output signal received from the differential amplifier when the differential inputs of the differential amplifier are operably coupled with a second polarity to the output node of the power switching device of the switching module and the current sense feedback node;
and
outputting a combined sense current based at least partly on a combination of the first phase sense current and the second phase sense current.

1 more element

Dependencies are inferred from the claim text.