US 12,224,574 B2
Device and method for compliance testing of power supply adapters of information handling systems
Wei Cheng Yu, New Taipei (TW); Merle Jackson Wood, III, Round Rock, TX (US); Geroncio Ong Tan, Austin, TX (US); and Chi Che Wu, Taipei (TW)
Assigned to Dell Products L.P., Round Rock, TX (US)
Filed by Dell Products L.P., Round Rock, TX (US)
Filed on Oct. 26, 2021, as Appl. No. 17/510,445.
Prior Publication US 2023/0128943 A1, Apr. 27, 2023
Int. Cl. H02H 3/20 (2006.01); G01R 31/40 (2020.01); H02H 1/00 (2006.01)
CPC H02H 3/20 (2013.01) [G01R 31/40 (2013.01); H02H 1/0007 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer-implementable method for compliance testing of a power supply adapter (PSA) to a powered device (PD) comprising:
measuring a voltage at synchronous rectifier (SR) gate of the PSA, where the SR gate receives current from a main converter of the PSA;
measuring a sense current at a sense resistor wherein the sense current follows from the SR gate;
calculating a sense voltage based on the measured sense current and value of sense resistor;
if sense voltage is zero, bypassing received current of the PSA at a first blocking MOSFET, and using a second blocking MOSFET for over voltage protection and passing the received current to an output of the PSA; and
if the sense voltage is not zero, passing the received current through the first blocking MOSFET.