US 12,470,140 B2
Voltage scaling current limit for mulistage power converter
Alessandro Zafarana, Milan (IT); Salvatore Leone, Milan (IT); and Massimiliano Musazzi, Como (IT)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed on Jan. 31, 2024, as Appl. No. 18/429,284.
Prior Publication US 2025/0247000 A1, Jul. 31, 2025
Int. Cl. H02M 3/156 (2006.01); H02M 1/00 (2006.01); H02M 1/32 (2007.01)
CPC H02M 3/156 (2013.01) [H02M 1/0009 (2021.05); H02M 1/32 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for operating a multistage power converter, the method comprising:
generating a plurality of control signals to drive the multistage power converter to produce an output voltage based on a reference voltage;
determining a total current of the multistage power converter;
detecting that the total current of the multistage power converter is at or below an upper reliability threshold;
setting the reference voltage to a target operating voltage when the total current is at or below the upper reliability threshold;
detecting that the total current of the multistage power converter rises above the upper reliability threshold; and
lowering the reference voltage from the target operating voltage to a lower operating voltage when the total current rises above the upper reliability threshold.