Boost off time adaptive adjustment unit and power converter comprising the same
AssigneeChengdu Monolithic Power Systems Co., Ltd.
InventorJian Zhang
Life of this patent
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Abstract
A power converter, a boost off time adaptive adjustment unit and a boost cycle short circuit protection module for controlling an off time of a boost cycle of the power converter. The boost off time adaptive adjustment unit is adapted to generate an off time control signal based at least on an input voltage and an output voltage of the power converter to regulate the off time of the boost cycle to change in an opposite direction to the output voltage when the power converter is operating normally during the boost cycle, and to regulate the off time of the boost cycle to change in a same direction as the output voltage when a short-circuit fault occurs during the power converter operating in the boost cycle.
Claims20
A power converter, comprising:
- a switch module, adapted to regulate energy or power transmission from an input port to an output port of the power converter in response to at least one control signal;
- and
- a control circuit, adapted to provide the at least one control signal to control the switch module to perform on and off switching;
- wherein the control circuit comprises a boost off time adaptive adjustment unit comprising:
- a first input terminal, adapted to be coupled to the input port of the power converter;
- a second input terminal, adapted to be coupled to the output port of the power converter;
- and
- an output terminal, adapted to provide an off time control signal;
- and wherein
- the boost off time adaptive adjustment unit is adapted to generate the off time control signal based at least on an input voltage at the input port and an output voltage at the output port, and wherein when the power converter is operating normally during a boost cycle, the off time control signal is configured to regulate the off time of the boost cycle to change in an opposite direction to the output voltage, and wherein when a short-circuit fault occurs during the power converter operating in the boost cycle, the off time control signal is configured to regulate the off time of the boost cycle to change in a same direction as the output voltage.
A boost off time adaptive adjustment unit for controlling an off time of a boost cycle of a power converter, the boost off time adaptive adjustment unit comprising:
- a first input terminal, adapted to be coupled to an input port of the power converter;
- a second input terminal, adapted to be coupled to an output port of the power converter;
- and
- an output terminal, adapted to provide an off time control signal;
- wherein
- the boost off time adaptive adjustment unit is adapted to generate the off time control signal based at least on an input voltage at the input port and an output voltage at the output port, and wherein when the power converter is operating normally during the boost cycle, the off time control signal is configured to regulate the off time of the boost cycle to change in an opposite direction to the output voltage, and wherein when a short-circuit fault occurs during the power converter operating in the boost cycle, the off time control signal is configured to regulate the off time of the boost cycle to change in a same direction as the output voltage.
A boost cycle short circuit protection module for a power converter having a boost cycle, wherein
- the boost cycle short circuit protection module is adapted to provide a short circuit protection signal based at least on an input voltage and an output voltage of the power converter, wherein if a short-circuit fault occurs during the power converter operating in the boost cycle, the boost cycle short circuit protection module is further adapted to make the short circuit protection signal to adjust an off time of the boost cycle to vary in a same direction as the output voltage.
Dependencies are inferred from the claim text.