Hi Jorge,
[quote user="jorge hernandez9"]
- What is different about the two breadboards? If you have a working breadboard, measure or scope the signals around the device and compare them against the non-working breadboard.
One is just bigger, I tried moving the IC back to the breadboard where it worked but I still have the same problem.
[/quote]
Moving a suspect IC back to the original board could potentially damage the working board. Please use a new IC on the original working board for a comparison.
[quote user="jorge hernandez9"]
- Have you confirmed the VCC power up ramp does not violate the absolute maximum ratings?
Not sure what you mean by this, are you talking about the inputs of the IC or the supplies?
[/quote]
Primarily the supplies. The inputs should also be checked, but the supplies are the most likely suspect.
[quote user="jorge hernandez9"]
- What value pulldown resistor did you place on the inputs?
I tried 1k and 10k
[/quote]
Thanks for the information
[quote user="jorge hernandez9"]
- Do you have a good thermal connection on your breadboard?
Are you referring to the connections? If so yes, some breadboards are new while the others I still use for other projects
[/quote]
Please see Figure 9 of the datasheet. Pins 4, 5, 12, and 13 connect to copper on the PCB to transfer heat from the device. There is a thermal shutdown in the device. The device will recover once the junction temperature is reduced. Please see post: e2e.ti.com/.../478783
Please check the outputs to confirm thermal shutdown is not activated.