Thermally aided power sharing of power supplies with or without an external current share line

摘要

A power system using thermal regulation, where the extent to which the temperature of a power module causes a change in the power output of the power module depends on the output current of the power module, is described. Similarly, the extent to which the output current of a power module causes a change in the power output of the power module depends on the temperature of the power module. Therefore, the effect of the temperature on the power output of the power module depends on the output current of the power module and the effect of the output current of the power module on the power output of the power module depends on the temperature of the power module.;In one embodiment of the present invention, a down slope power sharing system without a share line comprises N + 1 power modules coupled in parallel to the same output port, where N is an integer greater than one and represents the number of power modules needed to meet the power requirement of the load. In the above system, the slope of the down slope curve of a power module is changed in response to the temperature of the power module such that a power module operating at a higher temperature output less current for a given bus voltage than a power module operating at a lower temperature.;In another embodiment of the present invention, the power system includes 2N power modules (N being defined as above), where one group of N power modules are coupled to each other by a first share line and another group of N power modules are coupled to each other by a second share line. This allows the power output of the power modules to be controlled by thermally regulated down slope sharing and by temperature/current share lines.