Apparatus and method for efficient shutdown of adiabatic charge pumps
First Claim
1. A power converter, comprising:
- a charge pump;
a controller configured to sense a switching status of the charge pump;
an inductor having a first terminal and a second terminal, the first terminal being connected to the charge pump and the second terminal configured to be connected an output load; and
a switch element connected across the inductor, the controller being configured to control the switch element to close and open respectively based on a disable switching and enable switching status of the charge pump.
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Accused Products
Abstract
An apparatus and method for efficient shutdown of adiabatic charge pumps. A power converter includes a charge pump, a controller, an output load and an inductor. According to one aspect, the power converter includes a switch which is connected across the inductor, where the controller is configured to sense a status of the charge pump and to correspondingly drive the switch element. According to another aspect, the charge pump includes an active discharge circuit and a current-sense circuit, where the current-sense circuit is configured to activate the active discharge circuit. According to yet another aspect, the power converter includes a cascade multiplier having a plurality of high side and low side switches, where a pair of high side and low side switches are enabled simultaneously, such that the pair of high side and low side switches act as an active discharge switch for the charge pump.
127 Citations
20 Claims
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1. A power converter, comprising:
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a charge pump; a controller configured to sense a switching status of the charge pump; an inductor having a first terminal and a second terminal, the first terminal being connected to the charge pump and the second terminal configured to be connected an output load; and a switch element connected across the inductor, the controller being configured to control the switch element to close and open respectively based on a disable switching and enable switching status of the charge pump. - View Dependent Claims (2, 3)
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4. A charge pump comprising:
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first and second input terminals configured to receive an input voltage to the charge pump; third and fourth input terminals configured to output an output voltage of the charge pump based on the input voltage; a charge pump controller; an active discharge circuit and a current-sense circuit each connected;
a) to the charge pump controller and b) across the third and fourth terminals of the charge pump,wherein the charge pump controller is configured to receive a sense status from the current-sense circuit, and to correspondingly drive the current-sense circuit, and the current-sense circuit is configured to correspondingly activate the active discharge circuit. - View Dependent Claims (5, 6, 7)
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8. A circuital arrangement, comprising:
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a charge pump having a controller; a cascade multiplier having a plurality of high side and low side switches, wherein the controller is configured to receive a pair of external signals, and to correspondingly drive the plurality of high side and low side switches in the cascade multiplier, a first pair of high side and low side switches from the plurality of high side and low side switches are enabled simultaneously, such that the first pair of high side and low side switches act as an active discharge switch for the charge pump, and the first pair of high side and low side switches are coupled to a first phase node of the cascade multiplier. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A power converter, comprising:
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a charge pump; a controller; an adiabatic element; an output load comprising a programmable current sink circuit that is configured to draw a current through the output load based on a control signal from the controller, wherein the output load is connected to the adiabatic element, and wherein during a shut down phase of the power converter, the controller first controls the programmable current sink to reduce the current drawn through the output load and then controls the charge pump to disable switching. - View Dependent Claims (19, 20)
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Specification