Strobed DC-DC converter with current regulation
First Claim
1. A DC-DC converter comprising:
- converting means for converting a first DC voltage to a converted DC voltage; and
power conservation means having hysteresis for powering on said converting means in response to the converted DC voltage being less than a minimum voltage, and for powering off said converting means in response to the converted DC voltage being greater than a maximum voltage, said converting means comprising;
switching means for increasing the current flow through an inductor;
current sensing means for sensing the current flow through the inductor;
regulating means governed by said current sensing means to control said switching means in response to the current flow through the inductor exceeding a predetermined value, thereby regulating the current flow through the inductor;
voltage storage means for storing the converted DC voltage;
rectifying means having an input coupled to said switching means and an output coupled to said voltage storage means; and
timing means for periodically activating said switching means, wherein the inductor has an input coupled to a voltage source and an output coupled to said switching means and said rectifying means, and wherein the switching means couples the output of the inductor to a common potential when activated, and decouple the output of the inductor from the common potential when deactivated.
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Accused Products
Abstract
A DC-DC converter regulates the maximum current through an inductor. The DC-DC converter operates within a paging receiver and boosts a voltage from a single cell battery to substantially 3.1 VDC in order to operate circuits which require more voltage than that produced by the single cell battery. Such circuits include CMOS microcomputers and code plug. The DC-DC converter is current regulated thus providing for improved power conversion efficiency. The DC-DC converter is active when the voltage is below a minimum voltage and inactive when above a maximum voltage. The DC-DC converter provides for a wide range of load currents from the converted voltage without being controlled by a microcomputer and while delivering the power to the loads with an improved efficiency.
156 Citations
14 Claims
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1. A DC-DC converter comprising:
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converting means for converting a first DC voltage to a converted DC voltage; and power conservation means having hysteresis for powering on said converting means in response to the converted DC voltage being less than a minimum voltage, and for powering off said converting means in response to the converted DC voltage being greater than a maximum voltage, said converting means comprising; switching means for increasing the current flow through an inductor; current sensing means for sensing the current flow through the inductor; regulating means governed by said current sensing means to control said switching means in response to the current flow through the inductor exceeding a predetermined value, thereby regulating the current flow through the inductor; voltage storage means for storing the converted DC voltage; rectifying means having an input coupled to said switching means and an output coupled to said voltage storage means; and timing means for periodically activating said switching means, wherein the inductor has an input coupled to a voltage source and an output coupled to said switching means and said rectifying means, and wherein the switching means couples the output of the inductor to a common potential when activated, and decouple the output of the inductor from the common potential when deactivated. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A DC-DC converter comprising:
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converting means for converting a first DC voltage to a converted DC voltage, comprising; switching means for increasing the current flow through an inductor; current sensing means for sensing the current flow through said switching means; and regulating means governed by said current sensing means to control said switching means in response to the current flow through said switching means exceeding a predetermined value, thereby regulating the current flow through the inductor; and power conservation means having hysteresis for powering on said converting means in response to the converted DC voltage being less than a minimum voltage, and for powering off said converting means in response to the converted DC voltage being greater than a maximum voltage. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification