Hello all & happy new year 2024.
I have an issue related to RDGD3100I3PH5EVB, I tried to use a single leg (V-phase) of the inverter by injecting PWM signal but the output of the gate driver does not change and the INTB LED are on as in the picture. How can I solve this issue and can you provide me more detail documentation about pin configuration of this evaluation board apart from what had been published.
P.S: I used an STM32F4 since I don't have the MPC577x microcontroller.
Thank you for your answer. I have been very busy on other works lately. Here are some update:
1. Unfortunately, I have checked our EVB board and found out that it was broken before this post (2 out of 6 gate drivers are dead). We are trying to buy and replace them.
2. I have plan to buy MPC5777C EVB or MPC 5775E EVB to use along with this EVB. Can you provide me a quote about those?
3. Does NXP have a discount policy for university student? To be honest, my budget is quite small but i really want to try out NXP's microcontroller.
Hello Luong,
Healthy & successful New Year!
The most likely fault is either a deadtime fault (DEADT bit in the STATUS2 register) based on the PWM signal, or a desaturation fault (DESAT in the STATUS1 register) if the GD3100 has been configured that way.
If you have SPI capability, you can read the STATUS1 and STATUS2 registers to find out which error is present.
Deadtime fault:
Desaturation fault:
Can occur without a power device connected, due to the open collector pin: the DESAT pin immediately charges and trips and the gate is shut down. This is a severe fault with a power device attached, so the gate is latched off. You would see no gate movement in response to the PWM input signal on a scope, and zero difference in the supply current between PWM going vs. PWM off.
BR, Tomas