Huawei U8185 Maintenance Manual page 33

U8185
Maintenance Manual
When Vweak < Vbat < Vmax (typical value: 3.2–4.2 V), constant current charging is
performed. The charging current remains unchanged. When VBA T reaches Vmaxsel, the
charging current decreases and the constant current charging is complete.

During constant voltage charging, the VDD voltage remains unchanged. When Vbat is equal
to Vmaxsel and the charging current is lower than the threshold, the charging is complete.

Issue 1.0 (2012-03-23)
Constant voltage charging
Pulsed charging
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9 Principles and Failure Analysis
28