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Self-oscillation DC-DC power converter and circuit, and self-oscillation method
Self-oscillation DC-DC power converter and circuit, and self-oscillation method
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机译:自激式dc-dc功率转换器和电路以及自激式方法
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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.
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机译:一种自激振荡DC-DC转换器电路,包括:第一晶体管,电连接到输入正端子;第二晶体管,电连接到所述第一晶体管,并且可操作以使所述第一晶体管的基极电流的一部分通过;以及稳定地电连接在第二晶体管和输出正极之间的输出电压。输出负极端子直接连接到输入负极端子。自激式DC-DC转换器电路不使用辅助匝,从而允许使用NPN晶体管。正反馈通过第一晶体管从饱和状态到非饱和状态的电压变化V ce1 Sub>实现。在非饱和状态下,第二晶体管导通,第一晶体管截止,并且实现自振荡。通过这种结构,当输入电压低于5V dc Sub>时,自激式DC-DC转换器可以正常工作。
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