This requires an analysis of the internal structure of the IC and an understanding of its work in dynamics.
The resistance between Vss - pin11 and GND - pin10 on the new IC shows 175 Ohms in one direction.
When you receive new ICs, do the same.
The solution to the problem can be the installation of an additional transistor to control the triac Q2, or an optocoupler.
Thanks asis. You shared lots of helpful information.
I have no problem with modifying my device, or getting a different controller. However, my goal here is to show the simplest path someone else can follow and replicate. I have a couple of MOC3041's (opto triac) in my spares. Is this the type of opto setup you're referring to? Something like the first attached image?
I read most of this today:
https://www.nutsvolts.com/magazine/article/triac_principles_and_circuits_part_1There are several circuits in that article. Maybe at a glance you could tell me if there is a simple topology in that article worth testing out? (fig 18 is attached and the only reference to inductive loads specifically)
On another note, anyone here, feel free to give me a kind nudge when I publish something wrong. Like obviously, the DC power supply is from D1.... I am actually trying to read the datasheet beyond the surface skim needed for a schematic :-)
I keep having trouble with the "Mains Supply" section. It seems ass backwards using variables that are not defined or explained. Like what is "V
Smax = Maximum Supply Voltage" when there isn't a maximum specification in the "Absolute Maximum Ratings" or in "Electrical Characteristics?" Is it just half the peak rectified line voltage? Then there is the reference to "I
Smax = Maximum current consumption of the IC." I don't see it clearly defined or even vaguely defined.
Does anyone know what the jellybean alternatives are for a universal motor speed controller with soft start, that has better documentation? I'd just like to save the reference and maybe compare it so I can learn a bit quicker.
Edit: If I understand this correctly (
https://youtu.be/Tze1MOZ9Bx4), I can't use the MOC3041 because it is a Zero Crossing opto, and those are for relay-like operation. Something like a MOC3020 is what I need for phase control with an opto...I think