IN
/FAULT
R
DRV
D
S
TEMP
PWR
SGND
SN6505
/OC
V
DD
LDO 5V
GND
PWM_H
Isolator
IN
/FAULT
R
DRV
D
S
TEMP
PWR
SGND
SN6505
/OC
V
DD
LDO 5V
GND
PWM_L
Isolator
SW
V
dc
PGND
LMG352x
LMG352x
Figure 2-1. LMG352XEVM-04X Block Diagram
CAUTION
High-voltage levels are present on the evaluation module whenever it is energized. Take proper
precautions when working with the EVM.
2.1.1 FAULT and OC
The FAULT and OC pins of the LMG352XEVM-04X are active low when an undervoltage lockout occurs on an
auxiliary voltage rail, when an overtemperature event occurs, or when an overcurrent/short-circuit event occurs
on the LMG352XR0X0. The signals are level-shifted to AGND. Refer to the LMG352XR0X0 data sheet for
operation details.
CAUTION
Do NOT ignore a FAULT signal when using the LMG352XEVM-04X. Turn off both top and bottom
devices if any device generates a FAULT signal. The device under a fault condition may operate in
the undesired third-quadrant mode and can overheat or become damaged due to the high source-
drain voltage drop if the other device is still switching.
Introduction
6
LMG352XEVM-04X User Guide
SNOU178A – OCTOBER 2020 – REVISED FEBRUARY 2021
Copyright © 2021 Texas Instruments Incorporated
