| US 7,541,793 B2 | ||
| Parallel power supply with active droop current sharing circuit having current limiting function | ||
| Sakda Saeueng, Samutprakarn (Thailand); and Ming Chun Xu, Samutprakarn (Thailand) | ||
| Assigned to Delta Electronics, Inc., Taoyuan Hsien (Taiwan); and Delta Electronics (Thailand) Public Company, Limited, Samutprakarn (Thailand) | ||
| Filed on Jun. 07, 2005, as Appl. No. 11/146,823. | ||
| Prior Publication US 2006/0273740 A1, Dec. 07, 2006 | ||
| Int. Cl. G05F 1/00 (2006.01) | ||
| U.S. Cl. 323—284 [363/142; 307/43; 323/282] | 9 Claims |
| 1. A parallel power supply comprising:
a power converter for converting an input voltage into an output voltage having a different voltage level with the input voltage;
a current sensor coupled to an output end of the power converter for sensing the output voltage to generate a sensed output
voltage proportional to an output current of the power converter;
a current sensing amplifier coupled to the current sensor for amplifying the sensed output voltage to generate an amplified
sensed output voltage representative of the output current provided by the power converter of the parallel power supply as
a current feedback signal; and
a threshold level generator coupled to the current sensing amplifier for setting a threshold level equivalent to a voltage
level corresponding to a maximum allowed output current of the power converter, and conducting a current when the voltage
level of the current feedback signal is above the threshold level.
|