US 12,113,429 B1
Smooth transition between power modes in a power converter
Siddharth Maru, Austin, TX (US); Bryan McCoy, Austin, TX (US); Chanchal Gupta, Chandler, AZ (US); and Rosario Pagano, Austin, TX (US)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Appl. No. 18/697,813
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
PCT Filed Mar. 10, 2023, PCT No. PCT/US2023/015006
§ 371(c)(1), (2) Date Apr. 2, 2024,
PCT Pub. No. WO2023/183150, PCT Pub. Date Sep. 28, 2023.
Claims priority of provisional application 63/323,275, filed on Mar. 24, 2022.
Int. Cl. H02M 1/00 (2007.01); H02M 3/156 (2006.01); H02M 3/158 (2006.01)
CPC H02M 1/0032 (2021.05) [H02M 3/1566 (2021.05); H02M 3/158 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A system comprising:
a power converter for regulating an output voltage at an output of the power converter;
power management circuitry configured to enable operation of the power converter, including one or more first components critical to operation of the power converter in a high-power mode and one or more second components critical to operation of the power converter in both the high-power mode and a low-power mode in which the system consumes significantly less power than that of the high-power mode; and
a controller configured to:
cause the system to operate in one of the low-power mode and the high-power mode based on power demand from a load at the output of the power converter; and
when in the low-power mode:
monitor the output of the power converter to detect an occurrence of a load transient from the load, wherein monitoring the output of the power converter comprises one of:
monitoring for a condition in which the output voltage falls below a setpoint voltage of the system twice during a current period pulse of the power converter; and
monitoring for a condition in which the output voltage falls below a setpoint voltage of the system for a predetermined duration of time during a current period pulse of the power converter; and
in response to detecting the occurrence of the load transient, transition from the low-power mode to the high-power mode via a transition mode to minimize undershoot and overshoot of the output voltage.