公开(公告)号：US20250007390A1

公开(公告)日：2025-01-02

申请号：US18343189

申请日：2023-06-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mustapha El-Markhi ,  Vikram Mani ,  Avadhut Junnarkar

IPC: H02M1/32 ,  H02M1/088 ,  H02M3/157 ,  H02M3/158

Abstract: The techniques and circuits, described herein, include solutions for latch-up prevention in multi-phase direct current (DC) to DC converters by ensuring safe pulse width modulation (PWM) control sequencing. In some aspects a latch-up pre-detection circuit has first and second detection inputs configured to receive high-side and low-side PWM signals respectively. The latch-up pre-detection circuit is configured to monitor for a transition from a first state to a second state based on the first and second detection inputs. The transition from the first state to the second state may be associated with condition(s) favorable for latch-up. Upon detecting the transition from the first state to the second state, the latch-up pre-detection circuit can output a pulse signal to temporarily override the unsafe PWM control sequence and reduce the possibility of latch-up.