Phase shift clock for digital llc converter
AssigneeInfineon Technologies Austria AG
InventorMartin Feldtkeller
Life of this patent
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Abstract
The techniques of this disclosure may digitally generate a driver signal with a period (or frequency) at a finer resolution than can be achieved by simply counting clock cycles of a system clock. The driver signal may be configured to trigger based on single output clock signal that may be phase-shifted relative to the master system clock. A clock phase shift circuit may increment the phase shift of the output clock signal to any fraction relative to the master system clock. A driver signal generated based on the phase-shifted output clock may achieve the high resolution in frequency desirable when controlling some pulse-width modulated circuits, such as an LLC converter.
Claims20
A system comprising:
- a single, input clock, wherein the single, input clock defines a master input clock frequency;
- a clock phase shift circuit, configured to:
- output a second clock signal wherein a second clock signal frequency is approximately the same frequency as the master input clock frequency, and
- increment a phase shift of the second clock signal relative to the single, input clock;
- and
- a control unit configured to:
- receive the second clock signal,
- generate a driver signal at a predetermined frequency, wherein the phase shift of the second clock signal relative to the master input clock sets a fractional part of a frequency ratio between the master input clock frequency and the predetermined frequency.
Dependencies are inferred from the claim text.