Control method, pulse distribution module and control circuit
AssigneeNanjing Silergy Micro Technology Co., Ltd.
InventorsZhiyuan Shen, Peng Zhou, Zhaolong Yu, Zhengyong Ding
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Abstract
A method of controlling a power converter comprising N phase power stage circuits coupled in parallel, where N is a positive integer, can include: controlling an operating mode of the power converter; and disabling at least one pulse in a first trigger signal for controlling each phase power stage circuit in the power converter to start operating, in order to reduce a fluctuation amplitude of the output signal.
Claims18
A method of controlling a power converter comprising N phase power stage circuits coupled in parallel, wherein N is a positive integer, the method comprising:
- a) controlling an operating mode of the power converter;
- b) disabling at least one pulse in a first trigger signal for controlling each phase power stage circuit in the power converter to start operating, in order to reduce a fluctuation amplitude of the output signal;
- c) starting counting the pulses in the first trigger signal when an enable signal is active, and increasing a count value when each pulse in the first trigger signal arrives;
- and
- d) activating a first indication signal representing the counting is completed when the count value is not less than a count threshold, and deactivating the first indication signal when the count value is less than the count threshold or the enable signal is inactive.
A control circuit for a power converter comprising N power stage circuits coupled in parallel, wherein N is a positive integer, the control circuit comprising:
- a) an enable unit configured to control an operation mode of the power converter;
- b) a pulse shielding unit configured to disable at least one pulse in a first trigger signal for controlling each phase power stage circuit in the power converter to start operating when the power converter enters a first operating mode, in order to reduce a fluctuation amplitude of the output signal;
- c) wherein the pulse shielding unit comprises a counting module having a first counter configured to start counting the pulses in the first trigger signal when an enable signal generated by the enable unit is active, and to increase a count value when each pulse in the first trigger signal arrives;
- and
- d) wherein the counting module comprises a comparison circuit configured to activate a first indication signal representing the counting is completed when the count value is not less than the count threshold, and to deactivate the first indication signal when the count value is less than the count threshold or the enable signal is inactive.
Dependencies are inferred from the claim text.