针对一款应用于公交的智能车载监控终端,设计了一种基于Linear Technology公司的控制器LTC3789的四开关Buck-Boost开关稳压电源电路.根据车载情况确定电源的开关频率、输入输出电压范围、电流范围来选择合适的电感,MOSFET管,输入输出电容等相关元器件,设计了相应的电源电路.利用仿真软件LTspice Ⅳ对电源的转换效率和带载能力进行了仿真,验证了该开关电源可稳定输出预期电压并有较强的带载能力.%A four switch Buck-Boost power supply based on Linear Technology Corporation's controller LTC3789 is used in a kind of intelligent vehicle monitoring terminal for the bus.In order to select suitable inductor,input and output capacitors and MOSFETs and design relevant power converter,the switching frequency,input and output voltage range,current range must be determined according to vehicle-mounted conditions.The simulation of transfer efficiency and load capacity of power supply by LTspice Ⅳ shows that this switch power can export expected voltage stably and own large load capacity.
展开▼
