Hi Danny,
Apologies for the delayed response.
I was unable to recreate the issue in the lab. If possible, could you provide or capture the input and output waveforms on an oscilloscope? This would greatly help in diagnosing the problem.
It does seem like…
Part Number: DRV8770EVM Other Parts Discussed in Thread: DRV8770 , DRV8262 , DRV8262EVM , Tool/software: Hello,
I am investigating a few TI solutions for a new design :
DRV8703 / DRV8262 / DRV8770
I want to drive a 24V BDC boosted to 36V motor (10A rms current…
Part Number: DRV8770EVM We are trying to use the 8770 EVM with an external MCU to get a sine wave output. I removed the resistors 39-44 to isolate the MSP MCU. We recently bought a few different ones and it seems that one GD works perfectly it is the…
These are the signals i get when i instantly apply 3.3v to two inputs, this is the Mosfet i use -( MCAC38N10Y-TP). i have tried replacing the Mosfets but nothing changes. After driving in both directions i see that both high side Mosfets are not getting…
Brian,
Sorry you are correct. I didn't notice the 0V value is at the bottom of the green waveform. I agree there is an issue here.
Aiwen,
Do you have a DRV8770EVM? It would be good as a comparison, to use the DRV8770 and run similar tests.
Regards…
Hi Jejomar,
Unfortunately we don't currently have a Pspice model for the DRV8770. If you are interested in evaluating the DRV8770, you can use the DRV8770EVM evaluation module.
Regards,
Pablo Armet
Hi David,
This is a simple gate driver so having a resistor from gate to source will prevent the FET from turning ON when it should be OFF. Below is a screenshot of the DRV8770EVM schematic. There is a 100kohm resistor with an clamping diode for extra…
