Virtual parametric high side MOSFET driver
First Claim
Patent Images
1. A power converter comprising:
- a. an output transformer;
b. a resonant tank circuit coupled to the output transformer, comprising;
i. a first energy storing element;
ii. a primary switch for selectively charging a first energy storing element;
iii. a second energy storing element in parallel with the first energy storing element; and
iv. an auxiliary switch for selectively coupling a third energy storing element with the first energy storing element;
c. a first power source coupled to the resonant tank circuit for providing power to the resonant tank circuit;
d. a comparator to detect a voltage across at least one of the energy storage elements;
e. a driver to drive the auxiliary switch based on the output state of the comparator; and
f. a second power source coupled to the driver for providing power to the tank circuit, wherein the second power source is independent from the first power source.
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Abstract
A power supply apparatus and method of regulating is provided. A converter circuit includes a primary switching element and an auxiliary switching element. The auxiliary switching element is for transferring a reflected voltage signal. A transformer includes a primary and a secondary, the primary is coupled with the converter circuit. The converter circuit comprises a primary and an auxiliary switch for selectively determining a resonant frequency. The auxiliary switch is enabled by a driver having an independent power source so as to allow as strong a driver as necessary to drive a large auxiliary switch.
135 Citations
33 Claims
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1. A power converter comprising:
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a. an output transformer; b. a resonant tank circuit coupled to the output transformer, comprising; i. a first energy storing element; ii. a primary switch for selectively charging a first energy storing element; iii. a second energy storing element in parallel with the first energy storing element; and iv. an auxiliary switch for selectively coupling a third energy storing element with the first energy storing element; c. a first power source coupled to the resonant tank circuit for providing power to the resonant tank circuit; d. a comparator to detect a voltage across at least one of the energy storage elements; e. a driver to drive the auxiliary switch based on the output state of the comparator; and f. a second power source coupled to the driver for providing power to the tank circuit, wherein the second power source is independent from the first power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A power converter comprising:
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a. an output transformer; b. a first resonance capacitor coupled to the transformer to form a resonant circuit with a primary inductance of the output transformer; c. a primary switch for selectively charging the first resonance capacitor; d. a second resonance capacitor coupled to the output transformer; e. an auxiliary switch to form a resonant circuit with the primary inductance of the transformer; f. a comparator for determining an amount of charge on the first resonance capacitor; and g. a driver for selectively enabling and disabling the auxiliary switch according to an output state of the comparator, wherein the driver receives an independent power supply. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A power converter comprising:
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a. a transformer; b. a primary switch; c. a first resonance capacitor coupled to the transformer to form a resonant circuit with a primary inductance of the transformer; d. a second resonance capacitor coupled to the transformer through an auxiliary switch to form a resonant circuit with the primary inductance of said transformer; e. a driver that drives the auxiliary switch; and f. a comparator, wherein the comparator selectively enables the driver according to a switching cycle. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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Specification