US 12,345,774 B2
Methods and apparatus to detect and diagnose faults in buck regulators
Karthik Anyam, Bengaluru (IN); Preetam Charan Anand Tadeparthy, Bangalore (IN); Mayank Jain, Bangalore (IN); Dattatreya Baragur Suryanarayana, Bangalore (IN); and Charan Hemanth Kumar, Bangalore (IN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Jul. 27, 2023, as Appl. No. 18/227,149.
Claims priority of application No. 202341016858 (IN), filed on Mar. 14, 2023.
Prior Publication US 2024/0310455 A1, Sep. 19, 2024
Int. Cl. G01R 31/40 (2020.01)
CPC G01R 31/40 (2013.01) 20 Claims
OG exemplary drawing
 
1. A phase circuit configured to:
receive a pulse in a pulse width module (PWM) signal;
provide, after receiving the pulse, an output voltage to a load;
exhibit a fault;
in response to the fault corresponding to a first category, transmit a first code voltage in a current sense (CS) signal;
in response to the fault corresponding to a second category, transmit a reference voltage in the CS signal;
receive, after transmission of the reference voltage, a tristate voltage in the PWM signal; and
transmit, after receiving the tristate voltage, a second code voltage in the CS signal based on a type of the fault and the second category.