Patent ID: 9590436
Date: 2017-03-07
CPC Classifications: H02J

Claim:
1. A battery charging circuit comprising: first and second charging circuits, each charging circuit having a charging output connectable to a battery and comprising: a voltage regulator to provide power to the charging output; a battery voltage threshold value; and a controller operable to change a charging state of a battery charging operation based on comparing a detected battery voltage with the battery voltage threshold value, the charging output of the first charging circuit connected with the charging output of the second charging circuit, wherein the first charging circuit and the second charging circuit are configured to collectively charge the battery, the battery voltage threshold value of the first charging circuit set to a higher value than the battery voltage threshold value of the second charging circuit, wherein based on comparing the threshold values with the detected battery voltage, the battery charging operation in the second charging circuit is terminated prior to the battery charging operation in the first charging circuit.