Patent ID: 9570932
Date: 2017-02-14
CPC Classifications: H02J

Claim:
1. A charging current setting method for a charging module, comprising: detecting at least two voltage values associated with two input current values of an input voltage signal at an input terminal of the charging module to calculate an input resistance at the input terminal; setting a lower limit voltage value of the input voltage signal according to the input resistance; controlling an input current to increase its magnitude, so that voltage level of the input voltage signal decreases in accordance with increasing level of the input current; controlling the input voltage signal to remain on the lower limit voltage value when the input voltage signal is decreasing and reaches the lower limit voltage value, and recording a magnitude of the input current as an upper limit current value when the input voltage signal is on the lower limit voltage value and the input current becomes stable; and determining a charging current value of the charging module according to the upper limit current value.