US 12,282,368 B2
Fault identification of multiple phase voltage regulator
Shiguo Luo, Austin, TX (US); and Ralph H. Johnson, Round Rock, TX (US)
Filed by Dell Products L.P., Round Rock, TX (US)
Filed on Oct. 25, 2022, as Appl. No. 17/972,860.
Prior Publication US 2024/0134433 A1, Apr. 25, 2024
Prior Publication US 2024/0231456 A9, Jul. 11, 2024
Int. Cl. G06F 1/26 (2006.01); G06F 1/28 (2006.01); H02M 1/084 (2006.01); H02M 1/32 (2007.01); H02M 3/00 (2006.01); H02M 3/158 (2006.01)
CPC G06F 1/26 (2013.01) [H02M 1/084 (2013.01); G06F 1/28 (2013.01); H02M 1/32 (2013.01); H02M 1/327 (2021.05); H02M 3/003 (2021.05); H02M 3/1584 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A voltage regulator system of an information handling system, the voltage regulator system comprising:
a voltage regulator including multiple power-stages (Pstages); and
a voltage regulator controller to communicate with the voltage regulator, the voltage regulator controller to:
monitor for a first fault signal on a first pin of a circuit associated with a first Pstage of the Pstages;
in response to a first voltage of the first fault signal at the first pin being greater than a threshold voltage:
provide a pulse width modulated tristate signal to the first Pstage, wherein the pulse width modulated tristate signal causes the first Pstage to provide a signal on a second pin of the circuit; and
monitor the second pin of the circuit for a second fault signal;
determine whether a voltage of the second fault signal at the second pin is equal to a second voltage; and
based on the voltage being equal to the second voltage, determine a first fault has occurred in the first Pstage.