Methods and apparatus for open-loop enhanced control of power supply transients
First Claim
1. A system for supplying current to a dynamic load subject to a transient current requirement, said system comprising:
- a sense unit coupled to said dynamic load, said sense unit configured to sense the rate of change of supply current required by said dynamic load during said transient current requirement;
a current source coupled to said sense unit and said dynamic load, said current source configured to supply a current pulse to said dynamic load in response to said sense unit determining that said rate of change of supply current exceeds a predetermined threshold;
said current pulse having a shape characterized by a first region and a subsequent second region, wherein said first region includes a first boost current which exceeds said transient current requirement, and wherein said second region includes a second boost current whose amplitude is less than said transient current requirement.
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Accused Products
Abstract
A system is provided for supplying current to a dynamic load subject to transient current requirements. A sense unit coupled to the dynamic load is configured to sense the rate of change of supply current required by the dynamic load during a transient event. A current source coupled to the sense unit is configured to supply a current pulse to the dynamic load in response to the sense unit determining that the rate of change of supply current (di/dt) exceeds a predetermined threshold. The current pulse preferably has a shape characterized by a first region and a second region subsequent to the second region, wherein the first region includes a first boost current which exceeds the transient current requirement, and wherein the second region includes a second boost current which is less than the transient current requirement. More generally, a wideband transient suppression system is provided for controlling a wide spectrum of transients. The wideband system includes a primary regulator configured to compensate for low frequency transients, and a secondary regulator configured to provide short-term compensation current to the dynamic load until the relatively slow primary regulator can accommodate the transient event. The secondary regulator includes two major functional blocks: a close-loop voltage-sensing compensation circuit configured to compensate for transients falling within a mid-range frequency range, and an open-loop di/dt-sensing compensation circuit configured to compensate for transients falling within a high-frequency range.
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Citations
24 Claims
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1. A system for supplying current to a dynamic load subject to a transient current requirement, said system comprising:
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a sense unit coupled to said dynamic load, said sense unit configured to sense the rate of change of supply current required by said dynamic load during said transient current requirement;
a current source coupled to said sense unit and said dynamic load, said current source configured to supply a current pulse to said dynamic load in response to said sense unit determining that said rate of change of supply current exceeds a predetermined threshold;
said current pulse having a shape characterized by a first region and a subsequent second region, wherein said first region includes a first boost current which exceeds said transient current requirement, and wherein said second region includes a second boost current whose amplitude is less than said transient current requirement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power supply system comprising:
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a plurality of output banks coupled to a dynamic load subject to a transient current requirement;
a controller coupled to said plurality of output banks, said controller configured to control said output banks such that said output banks are either active output banks or inactive output banks;
each of said output banks comprising;
a sense unit coupled to said dynamic load, said sense unit configured to sense the rate of change of supply current required by said dynamic load during said transient current requirement;
a current source coupled to said sense unit and said dynamic load, said current source configured to supply, when said output bank is an active output bank, a current pulse to said dynamic load in response to said sense unit determining that said rate of change of supply current exceeds a predetermined threshold;
said current pulse having a shape characterized by a first region and a subsequent second region, wherein said first region includes a first boost current which exceeds said transient current requirement, and wherein said second region includes a second boost current whose amplitude is less than said transient current requirement. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A wideband transient suppression system for controlling a dynamic load subject to transient current requirements, said system comprising:
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a primary regulator configured to compensate for transients below a first frequency;
a secondary regulator, said second regulator including;
a voltage-sensing compensation circuit configured to compensate for transients between said first frequency and a second frequency;
a di/dt-sensing compensation circuit configured to compensate for transients above said second frequency. - View Dependent Claims (16, 17, 18)
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19. A method for supplying current to a dynamic load subject to a transient current requirement, said method including the steps of:
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a) sensing the rate of change of supply current required by said dynamic load during said transient current requirement;
b) supply a current pulse to said dynamic load in response to said sense unit determining that said rate of change of supply current exceeds a predetermined threshold, wherein said current pulse has a shape characterized by a first region and a subsequent second region, wherein said first region includes a first boost current which exceeds said transient current requirement, and wherein said second region includes a second boost current whose amplitude is less than said transient current requirement. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification