公开(公告)号：US06597155B2

公开(公告)日：2003-07-22

申请号：US09931608

申请日：2001-08-16

申请人： Minchao Huang ,  Yi Chen

发明人： Minchao Huang ,  Yi Chen

IPC分类号： G05F1613

CPC分类号： H02M3/1582

摘要： A self-oscillation DC-DC converter circuit which includes a first transistor electrically connected to an input positive terminal, a second transistor electrically connected to the first transistor and operable to pass a portion of a base current of the first transistor, and a circuit to steady the output voltage electrically connected between the second transistor and an output positive terminal. The output negative terminal is connected directly to the input negative terminal. The self-oscillation DC-DC converter circuit does not use an auxiliary turn, thereby allowing the use of NPN transistors. Positive feedback is achieved by a voltage change Vce1 of the first transistor from a saturation state to a non-saturation state. In the non-saturation state, the second transistor is turned on, the first transistor is turned off and self-oscillation is achieved. With this construction, the self-oscillation DC-DC converter operates normally when the input voltage is lower than 5Vdc.

摘要翻译： 一种自激振荡DC-DC转换器电路，其包括电连接到输入正端子的第一晶体管，与第一晶体管电连接并可操作以使第一晶体管的基极电流的一部分通过的第二晶体管，以及电路 稳定电连接在第二晶体管和输出正极端子之间的输出电压。 输出负极直接连接到输入负极。 自谐振DC-DC转换器电路不使用辅助转弯，从而允许使用NPN晶体管。 通过第一晶体管的电压变化Vce1从饱和状态到非饱和状态来实现正反馈。 在非饱和状态下，第二晶体管导通，第一晶体管截止并实现自振荡。 通过这种结构，当输入电压低于5Vdc时，自激振荡DC-DC转换器正常工作。