US 12,261,528 B2
Low voltage buck regulator voltage regulation with reduced overshoot and settling time
Raghavendra Ramachandra, Karnataka (IN); Pradeep Chitirala, Bangalore (IN); Priya Kakarla Naga Lakshmi, Bangalore (IN); and Mahtab Ahmed, Uttar Pradesh (IN)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Aug. 31, 2022, as Appl. No. 17/900,224.
Claims priority of application No. 202211030945 (IN), filed on May 30, 2022.
Prior Publication US 2023/0387802 A1, Nov. 30, 2023
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01); H02M 3/157 (2006.01); H03K 3/033 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 1/0038 (2021.05); H02M 3/157 (2013.01); H03K 3/033 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A power converter for providing power to a load, the power converter comprising:
a buck converter having a DC input and a DC output and that is configured to receive a DC voltage at the DC voltage input and provide DC output voltage at the DC output;
a voltage monitor that monitors a voltage provided at the DC output;
a selectively connectable transient suppression circuit connected across that DC output and connected to the voltage monitor, the selectively connectable transient suppression circuit comprising:
a dissipation circuit; and
a suppression circuit switch connected in series with the dissipation circuit that controls charge dissipation from the DC output into the dissipation circuit based on the voltage monitor determining that the voltage across the DC output is above a threshold;
wherein selectively connectable transient suppression circuit is configured such that the suppression circuit switch is configured to electrically connect the dissipation circuit to the DC output when the voltage monitor determines that the voltage across the DC output is above the threshold and to disconnect the dissipation circuit from the DC output when below the threshold and after a time period has elapsed;
the selectively connectable transient suppression circuit further comprising:
a monoshot circuit connected to the voltage monitor and the suppression circuit switch that controls operation of the suppression circuit switch and holds an input signal at its output for the time period, wherein the trigger is a monostable multi-vibrator and the time period is a multiple of a time period associated with the frequency of the buck converter.