Constant-voltage charger circuit of communication equipment

technical field [0001] The invention relates to the technical field of charging, in particular to a constant-voltage charger circuit for communication equipment. Background technique [0002] Since the lead-acid battery was invented 150 years ago, it has always had an absolute advantage in chemical energy batteries. This is because of its low price, reliable use, suitable for large current discharge, and wide range of ambient temperature. Lead-acid batteries play an important role in transportation, communications, military, navigation, aviation, photovoltaic power generation and other fields. In particular, the successful development of maintenance-free sealed lead-acid batteries has made the application of lead-acid batteries more extensive. As we all know, the service life of the battery is directly related to the performance of its charger. [0003] Most of the existing communication equipment chargers have single functions, and cannot intelligently control and adjust...