High-frequency DC-DC converter control
First Claim
Patent Images
1. A high-frequency DC-DC converter comprising:
- a resonant power stage configured for variable frequency commutation control and for pulse width modulation duty cycle control; and
a controller to operate the power stage such that the commutation frequency and the duty cycle of the power stage are both varied in response to the amount of load connected to an output of the converter when the power delivered to the load is less than a predetermined threshold level, and such that the commutation frequency of the power stage is substantially fixed and the duty cycle is varied in response to the amount of load when the power delivered to the load is greater than the predetermined threshold level,wherein the power stage is controlled by the controller to convert an input DC voltage to one of a higher output DC voltage and a lower output DC voltage.
6 Assignments
0 Petitions
Accused Products
Abstract
A high-frequency DC-DC converter. The high-frequency DC-DC converter comprises a resonant power stage and a controller to operate the resonant power stage. The resonant power stage is controlled by the controller with at least one of a variable frequency mode and a pulse width modulation mode to convert an input DC voltage to one of a higher output DC voltage and a lower output DC voltage.
27 Citations
20 Claims
-
1. A high-frequency DC-DC converter comprising:
-
a resonant power stage configured for variable frequency commutation control and for pulse width modulation duty cycle control; and a controller to operate the power stage such that the commutation frequency and the duty cycle of the power stage are both varied in response to the amount of load connected to an output of the converter when the power delivered to the load is less than a predetermined threshold level, and such that the commutation frequency of the power stage is substantially fixed and the duty cycle is varied in response to the amount of load when the power delivered to the load is greater than the predetermined threshold level, wherein the power stage is controlled by the controller to convert an input DC voltage to one of a higher output DC voltage and a lower output DC voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A high-frequency DC-DC converter comprising:
-
a resonant power stage configured for variable frequency commutation control and for pulse width modulation duty cycle control, the power stage including a primary portion comprising four electronic switches arranged as a full-bridge switching converter and a secondary portion comprising four diodes arranged as a full-wave rectifier; and a controller to operate the power stage such that the commutation frequency and the duty cycle of the power stage are both varied in response to the amount of load connected to an output of the converter when the power delivered to the load is less than a predetermined threshold level, and such that the commutation frequency of the power stage is substantially fixed and the duty cycle is varied in response to the amount of load when the power delivered to the load is greater than the predetermined threshold level, wherein the resonant power stage is controlled by the controller to convert an input DC voltage to one of a higher output DC voltage and a lower output DC voltage.
-
-
13. A method for converting low-voltage DC to high-voltage DC comprising the steps of:
-
operating a power stage in resonance, the power stage being configured for variable frequency commutation control and for pulse width modulation duty cycle control; and controlling the power stage such that the commutation frequency and the duty cycle of the power stage are both varied in response to the amount of load connected to an output of the converter when the power delivered to the load is less than a predetermined threshold level, and such that the commutation frequency of the power stage is substantially fixed and the duty cycle is varied in response to the amount of load when the power delivered to the load is greater than the predetermined threshold level, to convert an input DC voltage to one of a higher output DC voltage and a lower output DC voltage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
Specification