Power management power supply system for electronic electric energy meter

Abstract

The invention discloses a power management power supply system for an electronic electric energy meter. The system comprises a weak current main power supply loop, a power monitoring circuit, a power-down memory power supply circuit, a battery power supply circuit, a low power consumption wake-up circuit and a main control chip low power consumption management circuit, wherein the low power consumption wake-up circuit is connected with the main control chip low power consumption management circuit; the main control chip low power consumption management circuit is connected with the weak current main power supply loop; the power-down memory power supply circuit is connected with the battery power supply circuit and the weak current main power supply loop; a power management chip in the weak current main power supply loop is a multi-path output DC / DC high-efficiency power management chip; the main power chip is a DC / DC high-efficiency power chip; the power chip in the power-down memory power supply circuit is a DC / DC high-efficiency power chip; and finally, the weak current main power supply loop has a plurality of paths of effective power outputs all the time. Due to the adoption of the system of the invention, the high-performance chip can be applied to the electronic electric energy meter and the electronic electric energy meter can work stably in each power supply operating mode.

Description

technical field [0001] The invention relates to a power management and power supply system for an electronic electric energy meter. Background technique [0002] The chip used in the existing meter management platform is the M16C / 62P single-chip microcomputer, the power supply system is relatively simple, and there is only a low-power meter reading mode. The system is generally composed of a weak current main power supply circuit, a low power wake-up circuit, a battery power supply circuit, a power failure memory power supply circuit, and a battery monitoring circuit. 3.3V. The low-power wake-up circuit only provides level triggering, which gives an interrupt signal to the microcontroller M16C / 62P, and does not require hardware circuit switching. Battery power supply circuit: The switching between battery power supply +6V and external circuit power supply +5V adopts multi-circuit triode switching, such as: liquid crystal module power supply, infrared power supply, internal...

AI Technical Summary

Problems solved by technology

From the composition of the power supply management system of the existing energy meter, it can be seen that there are few power supply modes and no low-power sleep mode, which cannot meet the high-performance chips used in electronic energy meters.

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