JMG
Member level 3
Hi,
I am controlling 5x LM3409's from a pic. The ENABLE pin of each device is connected to the PIC directly, which also has a 510R resistor and LED connected to ground. This means that when that driver is enabled, the LED lights as an indicator and the ENABLE pin is energized. There are a few problems though. I seem to be getting multiple drivers turning on when only one driver is selected. I assumed that the ENABLE pin of inactive drivers was being pulled low through the 510R resistor and LED. Is that acceptable? I'm considering putting a 10K in parallel to the 510R and LED for each driver.
Any thoughts?
Thanks,
James
I am controlling 5x LM3409's from a pic. The ENABLE pin of each device is connected to the PIC directly, which also has a 510R resistor and LED connected to ground. This means that when that driver is enabled, the LED lights as an indicator and the ENABLE pin is energized. There are a few problems though. I seem to be getting multiple drivers turning on when only one driver is selected. I assumed that the ENABLE pin of inactive drivers was being pulled low through the 510R resistor and LED. Is that acceptable? I'm considering putting a 10K in parallel to the 510R and LED for each driver.
Any thoughts?
Thanks,
James