Danneskjold
- Apr 16, 2010
- 23
- Joined
- Apr 16, 2010
- Messages
- 23
Hello,
I'm working on a project that is essentially a variable output AC-DC SMPS controlled by the Infineon ICE3PCS01G combination PFC and PWM chip. that part is pretty straightforward. Here's where I'm getting hung up:
What I want to do is have it controlled by potentiometer (easy with the BOFO pin), but I also want the output to be constant. Previously, I've settled for 50% power on the pot is 50% voltage coming out of the circuit. Let's say it's driving a large DC water pump. What I would like is for the flowmeter on the pump's output to be determinant of what the dial says. e.g., setting of 5 will deliver half of the pump's capacity, but it might be 65% of the output power.
so right now I'm confounded by the presence of two analog inputs to one pin--the pot and the analog voltage from the flowmeter.
I realize this will probably end up needing a processor and some fancy programming, but if there's a way to get most of the way there--even if not perfect--I'd like to do that.
thanks in advance!
~dan
I'm working on a project that is essentially a variable output AC-DC SMPS controlled by the Infineon ICE3PCS01G combination PFC and PWM chip. that part is pretty straightforward. Here's where I'm getting hung up:
What I want to do is have it controlled by potentiometer (easy with the BOFO pin), but I also want the output to be constant. Previously, I've settled for 50% power on the pot is 50% voltage coming out of the circuit. Let's say it's driving a large DC water pump. What I would like is for the flowmeter on the pump's output to be determinant of what the dial says. e.g., setting of 5 will deliver half of the pump's capacity, but it might be 65% of the output power.
so right now I'm confounded by the presence of two analog inputs to one pin--the pot and the analog voltage from the flowmeter.
I realize this will probably end up needing a processor and some fancy programming, but if there's a way to get most of the way there--even if not perfect--I'd like to do that.
thanks in advance!
~dan
