Monolithic Power Systems, Inc.
BI-DIRECTIONAL BATTERY CHARGING CIRCUIT WITH VOLTAGE REGULATION CONTROL

Abstract:

An electric system having an input terminal to receive an input voltage, a system output terminal to provide a system voltage, and N charging units for charging N loads respectively. The electric system has an input switch coupled between the input terminal and a PMID terminal, a switching circuit coupled between the PMID terminal and the system output terminal. The switching circuit may convert the voltage received at the PMID terminal to the system voltage, or convert the system voltage to a boost output voltage at the PMID terminal. The electric system further has a PMID voltage control module having N input terminals coupled to the N charging units respectively, the PMID voltage control module senses N charging currents passing through the N charging units respectively, and adjusts the boost output voltage based on the N charging currents.