一种升压恒流源的研究与设计

Research and design of a voltage-boosting constant current source

为实现用干电池等低压电源驱动LED灯,该文设计了一种具有升压功能的恒流源。该恒流源将Boost升压电路与基于单片机的开关电源技术相结合,完成了升压、恒流、分量程供电。经过测试,该电源效率高达82%,误差小于3%。

In order to drive the LED lamp with low voltage power equal to dry battery, in this pa- per, a voltage - boosting constant current source is designed. This constant current source is combined with the Boost circuit and the switch power supply technology based on the single chip microcomputer, voltage - boosting, constant current, and power supply for sub - range realized. Tests shows that the effi- ciency of the power supply is up to 82% , and the error is less than 3%.