FLASH CHARGING PROTECTION CIRCUIT AND CONTROL METHOD THEREOF
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United States of America Patent
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Issued Date -
Dec 12, 2013
app pub date -
Aug 3, 2012
filing date -
Jun 8, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A flash charging protection circuit and a control method thereof adapted to a charging circuit coupled to a power supply are provided. An analog-to-digital converter receives a feedback voltage output from the charging circuit and an input voltage output from the power supply. A power voltage detection module detects whether the input voltage is abnormal or not. A charging state detection module detects whether a rising curve of the feedback voltage is abnormal or not. If a controller receives a power abnormal signal or a charging state abnormal signal, the controller disables a pulse width modulation signal generator to produce a pulse width modulation signal.
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