Current sensing module and power conversion apparatus and electronic apparatus using the same
First Claim
1. A current sensing module, adapted to detect a first load current flowing through a first load, the current sensing module comprising:
- a sampling stage circuit, coupled across the first load, and configured to selectively exchange coupling nodes between the sampling stage circuit and the first load by applying a multiplex switching means according to a current direction of the first load current, so as to sample the first load current flowing along a first direction or a second direction, and thus generate a sampling signal; and
an output stage circuit, coupled to the sampling stage circuit, and switching coupling nodes between the output stage circuit and an output terminals of the sampling stage circuit in collaboration with a switching timing of the sampling stage circuit, so as to generate a current indication signal for indicating a magnitude of the first load current according to the sampling signal.
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Abstract
A current sensing module and a power conversion apparatus and an electronic apparatus using the same are provided. The current sensing module is suitable for detecting a first load current flowing through a first load. The current sensing module includes a sampling stage circuit and an output stage circuit. The sampling stage circuit couples across the first load and selectively exchanges coupling nodes between the sampling stage circuit and the first load by a multiplex switching means, so as to sample the first load current flowing along a first direction or a second direction, and thus generate a sampling signal. The output stage circuit is coupled to the sampling stage circuit and switches coupling nodes between the output stage circuit and the output terminal of the sampling stage circuit, so as to generate a current indication signal indicating the magnitude of the first load current according to the sampling signal.
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Citations
23 Claims
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1. A current sensing module, adapted to detect a first load current flowing through a first load, the current sensing module comprising:
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a sampling stage circuit, coupled across the first load, and configured to selectively exchange coupling nodes between the sampling stage circuit and the first load by applying a multiplex switching means according to a current direction of the first load current, so as to sample the first load current flowing along a first direction or a second direction, and thus generate a sampling signal; and an output stage circuit, coupled to the sampling stage circuit, and switching coupling nodes between the output stage circuit and an output terminals of the sampling stage circuit in collaboration with a switching timing of the sampling stage circuit, so as to generate a current indication signal for indicating a magnitude of the first load current according to the sampling signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power conversion apparatus, comprising:
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a power conversion circuit, configured to convert an external power or a battery power into a working power for providing to a load apparatus, wherein the power conversion circuit has a first detection resistor coupled in series on a power conversion path; a current sensing module, coupled across the first detection resistor for detecting a first load current flowing through the first detection resistor, wherein the current sensing module comprises; a sampling stage circuit, coupled across the first detection resistor, and configured to selectively exchange coupling nodes between the sampling stage circuit and the first load by applying a multiplex switching means according to a current direction of the first load current, so as to sample the first load current flowing along a first direction or a second direction, and thus generate a sampling signal; and an output stage circuit, coupled to the sampling stage circuit, and switching coupling nodes between the output stage circuit and output terminals of the sampling stage circuit in collaboration with a switching timing of the sampling stage circuit, so as to generate a current indication signal indicating a magnitude of the first load current according to the sampling signal; and a control circuit, coupled to the power conversion circuit and the current sensing module, and configured to control operations of the power conversion circuit and the current sensing module. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An electronic apparatus, comprising:
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a battery, configured to provide a battery power; a charging terminal, configured to receive an external power; a power conversion apparatus, coupled to the battery and the charging terminal, wherein the power conversion apparatus comprises; a power conversion circuit, configured to convert the external power or the battery power into a working power, wherein the power conversion circuit has a first detection resistor connected in series on a power conversion path; a current sensing module, coupled across the first detection resistor for detecting a first load current flowing through the first detection resistor, wherein the current sensing module comprises; a sampling stage circuit, coupled across the first detection resistor, and configured to selectively exchange coupling nodes between the sampling stage circuit and the first load by applying a multiplex switching means according to a current direction of the first load current, so as to sample the first load current flowing along a first direction or a second direction, and thus generate a sampling signal; and an output stage circuit, coupled to the sampling stage circuit, and switching coupling nodes between the output stage circuit and output terminals of the sampling stage circuit in collaboration with a switching timing of the sampling stage circuit, so as to generate a current indication signal indicating a magnitude of the first load current according to the sampling signal; and the control circuit, coupled to the power conversion circuit and the current sensing module, and configured to control operations of the power conversion circuit and the current sensing module. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification