QUASI-CONTINUOUS VOLTAGE REGULATOR WITH DUAL POLARITY OUTPUTS
First Claim
1. A controller, comprising:
- a hysteretic circuit that provides a first ON level pulse when a corresponding first negative regulated voltage rises above a respective first voltage threshold;
the hysteretic circuit providing a second ON level pulse when a corresponding second positive regulated voltage drops below a respective second voltage threshold;
the hysteretic circuit providing an OFF level pulse when one of first and second switch currents increases above a current threshold; and
a switch control circuit that receives the first and second ON level pulses and the OFF level pulse and that provides first and second switch control outputs to separately regulate the first and second regulated voltages.
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Accused Products
Abstract
A controller includes a hysteretic circuit that provides a first ON level pulse when a corresponding first negative regulated voltage rises above a respective first voltage threshold. Similarly, a second ON level pulse is provided when a corresponding second positive regulated voltage falls below a respective second voltage threshold. The hysteretic circuit provides an OFF level pulse when one of first and second switch currents increases above a current threshold. A switch control circuit receives the first and second ON level pulses and the OFF level pulse, and provides first and second switch control outputs to separately regulate the first and second regulated voltages.
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Citations
20 Claims
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1. A controller, comprising:
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a hysteretic circuit that provides a first ON level pulse when a corresponding first negative regulated voltage rises above a respective first voltage threshold;
the hysteretic circuit providing a second ON level pulse when a corresponding second positive regulated voltage drops below a respective second voltage threshold;
the hysteretic circuit providing an OFF level pulse when one of first and second switch currents increases above a current threshold; anda switch control circuit that receives the first and second ON level pulses and the OFF level pulse and that provides first and second switch control outputs to separately regulate the first and second regulated voltages. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A voltage regulator comprising:
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an output circuit that provides first and second regulated voltages having opposite polarities, the output circuit comprising first and second switches that switch a supply voltage to an inductor in the output circuit; a hysteretic circuit that provides a first ON level pulse when a corresponding first negative regulated voltage rises above a respective first voltage threshold;
the hysteretic circuit providing a second ON level pulse when a corresponding second positive regulated voltage drops below a respective second voltage threshold;
the hysteretic circuit providing an OFF level pulse when one of first and second switch currents increases above a current threshold; anda switch control circuit that receives the first and second ON level pulses and the OFF level pulse and that provides first and second switch control outputs to the first and second switches to separately regulate the first and second regulated voltages. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method of a voltage regulation, comprising:
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coupling a first polarity supply voltage to an inductor through first and second switches to deliver first and second switch currents to the inductor; generating first and second opposite polarity regulated voltages from energy stored in the inductor by the first and second switch currents; generating a first hysteretic ON level pulse when the corresponding first regulated voltage rises above a respective first voltage threshold, and generating a hysteretic OFF level pulse when one of the first and second switch currents increases above a current threshold; and generating a second hysteretic ON level pulse when the corresponding second positive regulated voltage drops below a respective second voltage threshold, and generating a hysteretic OFF level pulse when one of the first and second switch currents increases above a current threshold; and providing first and second switch control outputs to the respective first and second switches to separately regulate the first and second regulated voltages. - View Dependent Claims (17, 18, 19, 20)
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Specification