JAJSON4 May 2022 TPS92643-Q1
PRODUCTION DATA
The device is protected from overcurrent conditions with cycle-by-cycle current limiting on both the high-side and the low-side MOSFETs.
The device turns off the high-side MOSFET and discharges the COMP capacitor when the drain current exceeds 4.8-A typical. The low-side switch is turned on to discharge the inductor current and output capacitor.
When the low-side switch is turned on, the switch current is also sensed and monitored. The device turns off both high-side and low-side MOSFETs and discharges the COMP capacitor when the drain current (from drain to PGND) exceeds 3.2-A typical.
The device employs hiccup mode overcurrent protection. In hiccup mode, the device shuts itself down and attempts to start after TOC. Hiccup mode helps reduce the device power dissipation under severe overcurrent conditions.