| US 7,414,868 B2 | ||
| Switched current power converter with partial converter decoupling for low load conditions | ||
| William Lee, Shen Zhen (China); Lucy Zhong, Meixian (China); Horace Liang, Zhaoqing (China); and Owen Jiang, Shenzhen (China) | ||
| Assigned to Astec International Limited, Kwun Tong, Kowloon (Hong Kong Special Administrative Region of the People's Republic of China, The) | ||
| Filed on Jun. 20, 2005, as Appl. No. 11/157,114. | ||
| Prior Publication US 2006/0285370 A1, Dec. 21, 2006 | ||
| Int. Cl. H02J 1/10 (2006.01); G05F 1/59 (2006.01) | ||
| U.S. Cl. 363—65 [323/272; 363/134] | 19 Claims |
| 1. A switched current power converter comprising:
a constant current source;
an output terminal;
a plurality of current stages, each current stage including a converter coupled to the constant current source for providing
a current and a switch circuit for selectively coupling the current in such current stage to the output terminal; and
a control circuit for controlling the switch circuits in said current stages to selectively couple current from the plurality
of current stages to the output terminal at the same time, the control circuit configured for decoupling the constant current
source from less than all of the current stage converters upon detecting a low load condition.
|