Electronics > Repair
18V/3A HY1503 PSU - weird CC/CV behavior while charging battery cells
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xavier60:
That sounds right. An earlier "HY1503modded.JPG" shows 10K for R19 and 1nF for C2. What does the load transient test look like?
iMo:
I do not have the HW pulser here - but here are the sims.
With C4 1uF it makes no difference, with C4 10nF the difference is visible.
(C11 in the original schematics).

With 1k 330p I get less swings than with the 10k 1n..
xavier60:
That seems to show the transitioning from CC to CV sometime after switch-on.
Cam you simulate a load transition test?
iMo:
..and with 100pF only it is the best..

CC - Yep, CC is set to aprox 0.7A and the load is 1A/0.1A pulsing..

Load transition - what exactly you want to see?
xavier60:
Yes, it does look that way.
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