Load Current
(10A/div)
Switch Node
Voltage
(100V/div)
Slew rate: 30V/ns
Figure 7-6. 30 V/ns at 400 V/20 A
Load Current(5A/div)
Switch Node Voltage(100V/div)
Slew rate: 150V/ns
Figure 7-7. 150 V/ns at 400 V/5 A
7.4 Shutdown Procedure
1. Turn off the high voltage power supply then PWM. Wait until red “HV Enable” LED turns off.
2. Disable the 12-V bias supply.
7.5 Additional Operating Notes
• Fault protection on the LMG342X-BB-EVM is not latching, therefore PWM will resume if a fault clears and the
LMG342X-BB- EVM is still operational.
Test Procedure When Paired With LMG342X-BB-EVM
18
LMG342XEVM-04X User Guide
SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022
Copyright © 2022 Texas Instruments Incorporated
