High efficiency high frequency resonant power conversion
First Claim
1. A power converter comprising:
- a switch network coupled to an input voltage port;
a power transformer having a primary winding and a secondary winding, wherein the primary winding is coupled to the switch network, and the secondary winding is coupled to a rectifier, and wherein the rectifier is coupled to an output voltage port;
a primary resonant tank having a first resonant capacitor and a first resonant frequency, and coupled to the primary winding of the power transformer and the switch network; and
a regulation circuit configured to control an output voltage across two terminals of the output voltage port of the power converter to be substantially proportional to an input voltage applied to the input voltage port and the switch network to operate at a frequency substantially close to the first resonant frequency, wherein the regulation circuit has an input connected to a third winding on a primary side of the power transformer, and wherein a voltage across two terminals of the third winding is proportional to the output voltage across two terminals of the output voltage port of the power converter in the steady-state operation.
3 Assignments
0 Petitions
Accused Products
Abstract
A power converter comprises a switch network coupled to an input voltage, a power transformer having a primary winding and a secondary winding, wherein the primary winding is coupled to the switch network, and the secondary winding is coupled to a rectifier, wherein the rectifier is coupled to an output voltage, a primary resonant tank having a first resonant capacitor and a first resonant frequency, and coupled to the primary winding of the power transformer and the switch network, and a regulation circuit configured to control the output voltage of the power converter to be substantially proportional to the input voltage and the switch network to operate at a frequency substantially close to the first resonant frequency.
23 Citations
18 Claims
-
1. A power converter comprising:
-
a switch network coupled to an input voltage port; a power transformer having a primary winding and a secondary winding, wherein the primary winding is coupled to the switch network, and the secondary winding is coupled to a rectifier, and wherein the rectifier is coupled to an output voltage port; a primary resonant tank having a first resonant capacitor and a first resonant frequency, and coupled to the primary winding of the power transformer and the switch network; and a regulation circuit configured to control an output voltage across two terminals of the output voltage port of the power converter to be substantially proportional to an input voltage applied to the input voltage port and the switch network to operate at a frequency substantially close to the first resonant frequency, wherein the regulation circuit has an input connected to a third winding on a primary side of the power transformer, and wherein a voltage across two terminals of the third winding is proportional to the output voltage across two terminals of the output voltage port of the power converter in the steady-state operation. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system having a power converter comprising:
-
a switch network coupled to an input voltage port; a power transformer having a primary winding and a secondary winding, wherein the primary winding is coupled to the switch network, and the secondary winding is coupled to a rectifier, and wherein the rectifier is coupled to an output voltage port; a primary resonant tank having a first resonant capacitor and a first resonant frequency, and coupled between the primary winding of the power transformer and the switch network;
a secondary resonant tank comprising at least a second resonant capacitor and having a second resonant frequency, and coupled to the secondary winding of the power transformer, wherein the second resonant frequency is substantially equal to the first resonant frequency; anda regulation circuit configured to control an output voltage across two terminals of the output voltage port to be proportional to an input voltage applied to the input voltage port in the steady-state operation and the switch network to operate at a frequency substantially equal to the first resonant frequency, wherein the regulation circuit comprises an error amplifier having a first input configured to receive a signal proportional to the output voltage from a third winding on a primary side of the power transformer, a second input configured to receive a signal proportional to the input voltage and an output configured to adjust the frequency of the switch network. - View Dependent Claims (9, 10, 11, 12)
-
-
13. An apparatus comprising:
-
a first switch network coupled to a power source; a power transformer having a primary winding and a secondary winding, wherein the primary winding is coupled to the first switch network, and the secondary winding is coupled to a second switch network coupled to an output voltage port; a primary resonant tank comprising a first resonant capacitor and a leakage inductance of the primary winding, wherein the primary resonant tank has a first resonant frequency and is coupled between the primary winding of the power transformer and the first switch network; a secondary resonant tank comprising a second resonant capacitor and a second leakage inductance of the secondary winding, wherein the secondary resonant tank has a second resonant frequency and is coupled between the secondary winding of the power transformer and the second switch network, and wherein the second resonant frequency is substantially equal to the first resonant frequency, and wherein a capacitance of the second resonant capacitor is equal to the square of a turns ratio of the power transformer times a capacitance of the first resonant capacitor; and a regulation circuit configured to control the first switch network to operate at a frequency substantially close to the first resonant frequency, wherein the regulation circuit has an input connected to a third winding on a primary side of the power transformer, and wherein a voltage across two terminals of the third winding is proportional to an output voltage across two terminals of the output voltage port in the steady state operation. - View Dependent Claims (14, 15, 16, 17, 18)
-
Specification