Patent ID: 7355303
Filing Date: 2008-04-08
Classification: H02J,H02M

Abstract:
1. A constant voltage discharge device for coupling between a power source and a power supply of an electronic circuit, the device comprising: an input; an output operatively coupled to the input; a storage capacitor; a first DC/DC voltage converter that receives an input current at a first voltage level and generates an output current at a second voltage level to charge the storage capacitor; a second DC/DC voltage converter to discharge the storage capacitor and provide an output voltage level at the output below the second voltage level to provide temporary power to the power supply of the electronic circuit when power between the power source and the power supply is interrupted; and a feedback circuit operatively coupled between the second DC/DC voltage converter and the output to monitor voltage between the power source and the power supply via the output, such that, when power at the input fails or shorts, the first DC/DC voltage converter turns off, and the second DC/DC voltage converter switches on, draining the storage capacitor to generate the output voltage level.