Description
7
SNVU637 – October 2018
Copyright © 2018, Texas Instruments Incorporated
Using the LMG3411EVM-029 Half-Bridge and LMG34XX-BB-EVM Breakout
Board EVM
2.2.3
Fault Protection
There is an option to disable PWM input to the FET card in the event of a fault signal from the
LMG3411EVM-029. When the FAULT Protect jumper is placed in the EN mode, PWM is disabled when
either LMG3411R070 has an active fault. This disable is not latching, so when the fault clears PWM
immediately resumes. If FAULT Protect mode is not desired it can be disabled by placing the jumper in
the DIS position. Besides, it is noted that to correctly observe the cycle-by-cycle overcurrent protection
with LMG34XX-BB-EVM, the jumper needs to be configured at DIS position. For the details of the over
current protection, please refer
of LMG3411R070. The FAULT LED will still illuminate when
either LMG3410 has an active fault, regardless of the position of FAULT Protect jumper.
2.3
Typical Applications
The LMG3411EVM-029 is designed for use in AC/DC, DC/DC and DC/AC applications
•
Totem-Pole PFC converters
•
Phase-Shifted Full Bridge or LLC Converter
•
Buck converter such as the LMG34XX-BB-EVM
2.4
Features
The LMG3411EVM-029 has the following features and specifications:
•
Two options to bias the LMG3411R070, isolated power or from bootstrap diode
•
Over temperature, cycle-by-cycle overcurrent, and under voltage lockout protection with FAULT
indication that is level shifted to an AGND referenced signal
•
Gate logic input support of either 3.3V or 5V logic
•
Maximum recommended operating voltage of 480V and absolute maximum voltage of 600V
The LMG34XX-BB-EVM has the following features and specifications:
•
Requires only a single 12V bias supply
•
Requires only a single 0V to 5V PWM input to generate gate drive signal
•
PWM disable in the event of a fault from the LMG3411EVM-029
•
Maximum recommended operating voltage of 480V and absolute maximum voltage of 600V
•
Maximum recommended operating inductor current of 8A
