DC-DC voltage converter with reduced output voltage ripple
First Claim
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1. An apparatus including an integrated buck converter circuit, comprising:
- an input electrode to convey a DC input voltage;
a plurality of intermediate electrodes;
an output electrode to convey a DC output voltage which is less than said DC input voltage;
switching circuitry coupled between said input electrode and said plurality of intermediate electrodes, and responsive to a plurality of control signals by providing, between said input electrode and respective ones of said plurality of intermediate electrodes, a plurality of current paths having respective conduction states during time intervals which are substantially mutually exclusive;
shunt rectification circuitry coupled to said plurality of intermediate electrodes; and
a plurality of inductances each one of which is coupled between a respective one of said plurality of intermediate electrodes and said output electrode.
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Abstract
An integrated DC—DC converter circuit in which multiple switched circuits operate in parallel to drive the output electrode with multiple pulsed charging voltages such that the corresponding respective output ripple voltage components combine with destructive interference, thereby reducing the net output ripple voltage.
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Citations
17 Claims
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1. An apparatus including an integrated buck converter circuit, comprising:
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an input electrode to convey a DC input voltage; a plurality of intermediate electrodes; an output electrode to convey a DC output voltage which is less than said DC input voltage; switching circuitry coupled between said input electrode and said plurality of intermediate electrodes, and responsive to a plurality of control signals by providing, between said input electrode and respective ones of said plurality of intermediate electrodes, a plurality of current paths having respective conduction states during time intervals which are substantially mutually exclusive; shunt rectification circuitry coupled to said plurality of intermediate electrodes; and a plurality of inductances each one of which is coupled between a respective one of said plurality of intermediate electrodes and said output electrode. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus including an integrated boost converter circuit, comprising:
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an input electrode to convey a DC input voltage; a plurality of intermediate electrodes; an output electrode to convey a DC output voltage which is greater than said DC input voltage; a plurality of inductances each one of which is coupled between said input electrode and a respective one of said plurality of intermediate electrodes; shunt switching circuitry coupled to said plurality of intermediate electrodes and responsive to a plurality of control signals by providing a plurality of shunt current paths having respective conduction states during time intervals which are substantially mutually exclusive; and rectification circuitry coupled between said plurality of intermediate electrodes and said output electrode. - View Dependent Claims (7, 8, 9, 10)
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11. An apparatus including an integrated buck-boost converter circuit, comprising:
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an input electrode to convey a DC input voltage; a plurality of intermediate electrodes; an output electrode to convey a DC output voltage which is selectively less than or greater than said DC input voltage; switching circuitry coupled between said input electrode and said plurality of intermediate electrodes, and responsive to a plurality of control signals by providing, between said input electrode and respective ones of said plurality of intermediate electrodes, a plurality of current paths having respective conduction states during time intervals which are substantially mutually exclusive; a plurality of shunt inductances each of which is coupled to a respective one of said plurality of intermediate electrodes; and rectification circuitry coupled between said plurality of intermediate electrodes and said output electrode. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification