原标题：TI PMP30693超级电容备份电源参考设计

　　TI公司的PMP30693是超级电容备份电源参考设计,在电源中断时提供备份电压,它管理对超级电容的充电,并提供反向阻隔保护.超级电容的充电电流和电压可调整.当输入电压下降时,降压-升压转换器TPS63802就会接替,并产生恒定备份电压.超级电容和电压界定了备份电源所获得的能量.超级电容备份电源参考设计PMP30693提供3.7V/300mA的备份输出大于100秒,直至输出电压下降.主要用于任意波形发生器(AWG),电表和实验室和现场仪表.本文介绍了主要特性,电路图,材料清单和PCB设计图.

　　Supercapacitor backup power supply with current limit and active cell balancing reference design

　　This reference design automatically provides a back-up voltage during a power interruption. It manages the charging of supercaps and provides reverse blocking protection. The maximum supercap charging current and voltage can be adjusted. When the input voltage fails a buck-boost converter (TPS63802) takes over and generates a constant backup voltage. The supercap capacitance and voltage define the energy which is available for the backup. The PMP30693 provides a stable backup output of 3.7 V at 300 mA for more than 100 s until the output voltage drops.

　　备份电源参考设计应用:

　　Arbitrary waveform generator (AWG)

　　Electricity meter

　　Lab & field Instrumentation

　　图1. 备份电源参考设计外形图

　　备份电源参考设计材料清单: