Power-down data storage power management circuit

The invention relates to a power-down data storage power management circuit, which comprises a first double diode, a second double diode, a third double diode, a triode, a second resistor, a third resistor, a fourth resistor, a second capacitor, a super capacitor, a battery and a memory. And the triode is not conducted during normal work and is conducted during power down, so that the super capacitor provides power for the memory. According to the power-down data storage power management circuit, an intelligent meter can have enough power for data storage operation after detecting a power-down signal according to different voltages of all parts during power down, power support is provided for power-down data storage, and meanwhile the risk of device failure is reduced to the maximum extent. 本发明涉及一种掉电存数电源管理电路，包括第一双二极管、第二双二极管、第三双二极管，三极管，第二电阻、第三电阻、第四电阻，第二电容，超级电容，电池及存储器。三极管在正常工作时不导通，在掉电时导通，使超级电容为存储器提供电源。该掉电存数电源管理电路，能够根据掉电时各部分电压的不同，使智能表检测到掉电信号后，有足够的电源进行存数操作，为掉电存数提供了电源支持，同时最大限度降低器件失效的风险。