Protective circuit
AssigneeASMedia Technology Inc.
InventorTing-Wen Su
Life of this patent
Estimating the term…
Abstract
A protective circuit is provided. The protective circuit includes a charging unit, a voltage regulating unit, and a comparing unit. The charging unit receives a rise signal and an over-current signal, and outputs a first reference voltage. The voltage regulating unit receives the first reference voltage and adjusts an output voltage according, to the first reference voltage and a feedback voltage. The comparing unit receives the feedback voltage and compares the feedback voltage with a first threshold voltage to determine whether to output the rise signal to the charging unit.
Claims12
A protective circuit connected to an input source, wherein the input source provides an input current, and the protective circuit outputs an output voltage, the protective circuit comprising:
- a charging unit for receiving a rise-voltage signal and an over-current signal and outputting a first reference voltage;
- a voltage regulating unit electrically connected to the charging unit, wherein the voltage regulating unit receives the first reference voltage, and adjusts the output voltage according to the first reference voltage and a feedback voltage corresponding to the input current;
- a comparing unit electrically connected to the voltage regulating unit and the charging unit for receiving the feedback voltage, and comparing the feedback voltage with a first threshold voltage to determine whether to output the rise-voltage signal to the charging unit;
- and
- an over-current detecting unit electrically connected to the voltage regulating unit and the charging unit for receiving a detecting voltage corresponding to the input current from the voltage regulating unit, wherein the over-current detecting unit compares the detecting voltage with a second threshold voltage to determine whether to output the over-current signal.
Dependencies are inferred from the claim text.