APPARATUS AND METHOD FOR PROTECTING SUPPLY MODULATOR

摘要

PURPOSE: A device and a method for protecting a power modulator are provided to reduce anomaly situations by protecting a circuit from electrical stresses. CONSTITUTION: At least one sensing part(451~457) senses one between current and voltage. At least one operation part(481~484) performs a protective measure. The protective measure corresponds to at least one electrical stress situation. A filter filters a signal passed through a switch. A linear shaped regulator generates attenuating current removing excessively generated amount. [Reference numerals] (414) First feedback circuit; (415) Second feedback circuit; (423) Switch driver; (424) Third feedback circuit; (425) Comparator; (452) Second current sensor; (454) First current sensor; (454) First voltage sensor; (455) Second voltage sensor; (456) Temperature sensor; (457) Battery sensor; (461) Logic part; (471) Buffer; (481) First blocking part; (482) Second blocking part; (483) Pass part; (484) End part; (AA) Power A; (BB) Signal input; (CC) Output; (DD) Power B;