US 11,867,732 B2
Output voltage protection controller using voltage signal dynamically adjusted by offset voltage for controlling output voltage protection of voltage regulator and associated method
Nien-Hui Kung, San Jose, CA (US); and Chia-Hua Chou, Hsinchu (TW)
Assigned to MediaTek Singapore Pte. Ltd., Singapore (SG)
Filed by MediaTek Singapore Pte. Ltd., Singapore (SG)
Filed on Feb. 13, 2022, as Appl. No. 17/670,502.
Claims priority of provisional application 63/222,488, filed on Jul. 16, 2021.
Claims priority of provisional application 63/186,194, filed on May 10, 2021.
Prior Publication US 2022/0357373 A1, Nov. 10, 2022
Int. Cl. G01R 19/165 (2006.01); G01R 19/00 (2006.01)
CPC G01R 19/16566 (2013.01) [G01R 19/0038 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An output voltage protection controller comprising:
a comparator circuit, arranged to compare a first voltage signal with a second voltage signal to generate a control signal that controls output voltage protection of a voltage regulator, wherein one of the first voltage signal and the second voltage signal is a feedback voltage derived from an output voltage of the voltage regulator, and another of the first voltage signal and the second voltage signal is a voltage detection threshold; and
a voltage adjustment circuit, arranged to inject an offset voltage to the second voltage signal for dynamically adjusting the second voltage signal during a period in which a target regulated voltage level of the output voltage is a constant;
wherein the voltage adjustment circuit is arranged to detect occurrence of an event to generate a detection result, and refer to the detection result to inject the offset voltage to the second voltage signal; and the second voltage signal has a first constant voltage during a period in which the event does not occur, and the voltage adjustment circuit is arranged to set the offset voltage by a time varying voltage and inject the offset voltage to the second voltage signal during a period in which the event occurs.