Thanks schmitt trigger and treez for the responses.
For that power level and input voltage range, a flyback. I would check Power Integration's website:
https://ac-dc.power.com/
I looked up the website like you guided me but I couldn't find a flyback of about the same power (7.5W) output but I found one with 17W output with 18V, 0.67A and 5V, 1A output.
The 18V is still suitable where I needed to use the 15V. However, I don't know whether it is okay to go for such a substantially higher output-power flyback.
I have not use a flyback before and I have not read from anywhere what effect that might cause.
Is it okay to go for the 17W output? What's your advice?
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yes a offline flyback is for you.
Any current mode flyback would be good.
How much power is drawn from the
15v, 5v and 3v3 rails individually?
You could even use the new powerint.com chip that has the feedbakc internally, its on/off control but youre only after 7.5w.
It coudl be on the ame pcb yes, but what is power as asked above?...as that will determine the final answer to you
Hello treez,
I cannot determine the actual value that the system is going to draw from each power rail. I just estimated the power, having put certain factor into consideration.
Nonetheless, I estimated that 2.5W (max) will be drawn from the 15V rail; 1.7W (max) will be drawn from the 5V rail; and the 3V3 rail is just to power the Altera's EPM3032 CPLD core (Vccint) and also the output buffers (Vccio). If there is a way of figuring out the power a system is expected to draw, please show me.
Also, please, can you enlighten me on the effect of trying to draw lesser current from a current-mode flyback than that which it was designed for if there is any effect?