I've got a couple of faulty power supplies, 12V/20A that are sold as power supplies for LED stripes. Both exhibit a similar failure but I cannot figure out how to fix it.
Both provide 12V without load, but as soon as load if applied (even if only 100mA load) the power supply will cut down the power, it will to restart, and the cycle will repeat, as if it was overloaded (the led in the power supply will flicker).
From that I guess that high-voltage switching transistor is ok, regulation is ok as voltage is stable as while load is ok. Output diode is ok (I have already tested one of them after taking out out the circuit).
What else could be causing this failure mode?
Thanks!
Both provide 12V without load, but as soon as load if applied (even if only 100mA load) the power supply will cut down the power, it will to restart, and the cycle will repeat, as if it was overloaded (the led in the power supply will flicker).
From that I guess that high-voltage switching transistor is ok, regulation is ok as voltage is stable as while load is ok. Output diode is ok (I have already tested one of them after taking out out the circuit).
What else could be causing this failure mode?
Thanks!