Control method for multi-phase DC-DC controller and multi-phase DC-DC controller
AssigneeuPI Semiconductor Corp.
InventorHua-Chiang Huang
Life of this patent
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Abstract
A multi-phase DC-DC controller. The multi-phase DC-DC controller comprises converter channels, a channel control device and a power control device. Each converter channel comprises a switch device, a first output node and an inductor coupled between the switch device and the first output node. The channel control device generates adjusted pulse width modulation signals according to control signals of the converter channels to respectively control operation of the switch device in each converter channel. The power control device generates the control signals according to sensed currents in the converter channels so as to dynamically turn on or off each converter channel according to the sensed currents.
Claims26
A multi-phase DC-DC controller, comprising:
- a plurality of converter channels, wherein each converter channel comprises a switch device, a first output node and an inductor coupled between the switch device and the first output node;
- a channel control device generating a plurality of adjusted pulse width modulation (PWM) signals according to a plurality of control signals of the converter channels to respectively control operation of the switch device in each converter channel;
- and
- a power control device generating the control signals according to a plurality of sensed currents in the converter channels so as to dynamically turn on or off each converter channel according to the sensed currents.
A multi-phase DC-DC controller, comprising:
- a first converter channel comprising a first switch device, a first output node and a first inductor coupled between the first switch device and the first output node;
- a second converter channel comprising a second switch device, a second output node and a second inductor coupled between the second switch device and the second output node;
- a first sensing device coupled to the first converter channel to sense a first current at the first output node;
- a second sensing device coupled to the second converter channel to sense a second current at the second output node;
- a channel control device generating a first adjusted pulse width modulation (PWM) signal according to a first control signal to control operation of the first switch device, and generating a second adjusted PWM signal according to a second control signal to control operation of the second switch device;
- and
- a power control device generating the first control signal according to the first current and generating the second control signal according to the second current so as to dynamically turn on or off the first converter channel and the second converter channel according to the first and second sensed currents.
A method for controlling operation of a multi-phase DC-DC controller, wherein the multi-phase DC-DC controller comprises a plurality of converter channels turning on or off according to a plurality of adjusted pulse width modulation (PWM) signals, respectively, comprising:
- detecting a loading current at an output node of each converter channel;
- comparing the loading current with a predetermined current to obtain a compared result;
- and
- generating the adjusted PWM signal of each converter channel according to the compared result.
Dependencies are inferred from the claim text.