US 12,146,922 B2
System and method for input power detection of two power sources using single monitoring circuit
Vaibhav Kumar Somani, Karnataka (IN); and Alagan Thiruvarul Selvakkumaran Sathyan, Tamilnadu (IN)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Apr. 14, 2022, as Appl. No. 17/720,406.
Claims priority of application No. 202211006908 (IN), filed on Feb. 9, 2022.
Prior Publication US 2023/0251326 A1, Aug. 10, 2023
Int. Cl. G01R 31/40 (2020.01); G01R 31/28 (2006.01); H02J 9/06 (2006.01)
CPC G01R 31/40 (2013.01) [G01R 31/2827 (2013.01); H02J 9/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A voltage supply system comprising:
a first power supply branch that includes:
a first voltage supply;
a serially connected first diode and first switch connected between the first voltage supply and an output of the voltage supply system; and
a first gate driver connected to the first switch to control operation of the first switch;
a second power supply branch that includes:
a second voltage supply;
a serially connected second diode and second switch connected between the second voltage supply and the output of the voltage supply system; and
a second gate driver connected to the second switch to control operation of the first switch; and
a voltage monitor/controller configured to perform a built-in test of the system by controlling the state of the first and second switches by controlling enable signals provided to the first and second gate drivers;
wherein the gate drivers receive power from their respective power supplies; and
wherein the first gate driver includes a first enable input (EN1) and the second gate driver includes a second enable input (EN2), wherein the first gate driver causes the first switch to conduct when it receives a signal at EN1 and the second gate driver causes the second switch to conduct when it receives a signal at EN2.