Mains frequency synchronous burst mode power supply
AssigneeThomson Licensing
InventorAnton Werner Keller
Life of this patent
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Abstract
A synchronous burst mode power supply includes a power converter for transforming an AC mains from a relatively low frequency to a higher frequency, and a gate circuit responsive to the AC mains supply for enabling the power converter (2) to initiate a burst of output pulses at the higher frequency each time the AC mains supply occurs within a predetermined range. In an alternative embodiment, the power supply has a regulating circuit for regulating output from the power converter that includes a current feedback loop to the gate circuit for pre-regulating control of the power converter in response to load variations.
Claims25
A synchronous burst mode power supply comprising:
- a power converter for transforming an AC mains from a relatively low frequency to a higher frequency;
- and
- a gate circuit responsive to said AC mains supply for enabling said power converter to initiate a burst of output pulses at said higher frequency each time a momentary amplitude of said AC mains supply occurs within a predetermined range.
A synchronous burst mode standby power supply comprising:
- a self-oscillating power converter for receiving an AC mains supply;
- a transformer primary winding coupled to said power converter and receiving pulses therefrom for generating a supply of power at a secondary winding of said transformer;
- and
- a gate circuit coupled to said AC mains supply and said power converter, wherein said gate circuit enable operation of said self-oscillating power converter while a momentary amplitude of said AC mains supply cycles through a predetermined range.
A method for providing synchronous burst mode power comprising the steps of:
- receiving an AC mains supply at a relatively low frequency;
- detecting when a momentary amplitude of said AC mains supply occurs within a predetermined range, and
- initiating a burst of output pulses at a higher frequency than said relatively low frequency responsive to said detecting step.
Dependencies are inferred from the claim text.