| 摘要 |
A current control circuit for light emitting diodes includes a power source, a current converting unit, a switch control unit and a number of transformers. The current control circuit provides direct current. The current converting unit is electrically connected to the power source and includes two couples of field effect transistors. The switch control unit is electrically connected to the current converting unit and is capable of providing a number of pulse signals to control the current converting unit. The two couples of field effect transistors receive pulse signals from the switch control unit and are alternately switched on and off. The direct current from the power source is converted into corresponding alternating current for the transformers. The current control circuit can provide stable and consistent current, enabling light sources to keep uniform brightness. |
