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US 2003/0141907 A1Published application
Current-sharing modular supply method and circuit
OwnerAntonio Canova, Minho Kiminventors
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OwnerAntonio Canova, Minho Kiminventors
Estimating the term…
The circuit comprises a plurality of supply modules for delivering current to a common load. Each supply module is equipped with a driving circuit for controlling the current delivered by the module. The supply modules are connected together by a share bus on which a signal is present for balancing the current delivered by each supply module, in such as way as to control and reduce the difference between the current delivered by a dominant supply module and the current delivered by the remaining supply modules of the circuit. Associated to each supply module are means for generating a PWM signal, the duration of which is proportional to the current delivered by the respective supply module. In addition, each supply module is connected to the share bus in such a way that on the latter there is present a digital share signal, which is a function of the digital PWM signal generated by the dominant supply module. In each supply module, means are provided for generating an error signal, the said means generating, on the basis of the PWM signal of the module itself and on the basis of the digital share signal, an error signal, which constitutes a feedback signal for the driving circuit of the supply module.
A control circuit for a current-sharing power supply module, comprising:
A control circuit for balancing load currents delivered by a plurality of power supply modules, each power supply module including a driving circuit for controlling the current delivered by the power supply module associated with the driving circuit, the power supply modules being connected together using a share bus, comprising:
The circuit of claim 22, wherein each supply module comprises a logic gate to the inputs of which the digital pulse-width modulation signal generated by said supply module an the digital share signal are applied, and in that the oup0t of said logic gate is applied to a low-pass filter for generating said error signal.
A method for controlling the current delivered by a plurality of supply modules which are connected to a common load and each of which is connected to a driving circuit for controlling the current delivered by said module, in which on a share bus that joins said supply modules a signal is applied that is proportional tot he current delivered by a dominant supply modules, said signal on the share bus being sued by each supply module for correcting the current that its delivers;
Dependencies are inferred from the claim text.