PS Problem

[astroboyy]

hi all, need some help and clarifications. just got a sony ps unit from koba. its tuned to output 13.6v. tried to hook it up to my triton and apache but the ps just shut down. i tried hooking it to just either triton or apache and same problem. if i shut the ps down and restart it without hooking anything, it works fine.

anyone able to give me some advise as to what went wrong.

[Adrianli]

Ur PS provide how many amps?

I think need abt 4 to 5 amps.

[ofna]

hi all, need some help and clarifications. just got a sony ps unit from koba. its tuned to output 13.6v. tried to hook it up to my triton and apache but the ps just shut down. i tried hooking it to just either triton or apache and same problem. if i shut the ps down and restart it without hooking anything, it works fine.

anyone able to give me some advise as to what went wrong.

how much you got it for?regulated PS or those 4 notebook type?

[Super-Hornet]

I assuming your PS is a Switch Mode Power Supply... just like computer power supply. Normally those power supply comes with short circuit protection... That is when it sense that there is a short circuit, it will trip/cutoff/shutdown the power supply for protection.

Normally charger has a big capacitor inside. Because of that, if u connect power to it, the capacitor will charge up and during that time it charge up, it behave like short circuit. That will cause your sensitive or weak PS into thinking it is shorted. That is why your PS goes shutoff state.

To prevent unwanted/false power cutoff, u should connect your charger first to your power supply before u turn it the main switch on.

Super-Hornet

[astroboyy]

I assuming your PS is a Switch Mode Power Supply... just like computer power supply. Normally those power supply comes with short circuit protection... That is when it sense that there is a short circuit, it will trip/cutoff/shutdown the power supply for protection.

Normally charger has a big capacitor inside. Because of that, if u connect power to it, the capacitor will charge up and during that time it charge up, it behave like short circuit. That will cause your sensitive or weak PS into thinking it is shorted. That is why your PS goes shutoff state.

To prevent unwanted/false power cutoff, u should connect your charger first to your power supply before u turn it the main switch on.

Super-Hornet

hi super-hornet, thats what i did. connected everthing to the PS before switching on the PS. I then connected a dymond charger to charge nicd and it was fine charging till i switch another pack and after charging for a short while it shut down again. Weird.

[AirTrekker]

Not sure if this is the same problem but with my sony PSU, I had to tweak the trimpot setting to set lower the output voltage.

When I set it to 13.6V, it would run but the PSU would shut down after a while. After tweaking the trimpot and setting the output voltage to 13.3V, no more shutdowns.

I don't know the theory behind it but lowering the power supply output voltage resolved the problem for me.

Hope this helps!

[Super-Hornet]

Then changes your PS is going thermal shutdown. That means your PS cannot sustain the high current drawn or circuit was not design for such o/p voltage or really sux power supply.

Since our charger can accept 12V, try tune your o/p voltage to 12V instead.

Super-Hornet

[astroboyy]

Not sure if this is the same problem but with my sony PSU, I had to tweak the trimpot setting to set lower the output voltage.

When I set it to 13.6V, it would run but the PSU would shut down after a while. After tweaking the trimpot and setting the output voltage to 13.3V, no more shutdowns.

I don't know the theory behind it but lowering the power supply output voltage resolved the problem for me.

Hope this helps!

hi airtrekker, mine was set at 13.6v

[astroboyy]

Then changes your PS is going thermal shutdown. That means your PS cannot sustain the high current drawn or circuit was not design for such o/p voltage or really sux power supply.

Since our charger can accept 12V, try tune your o/p voltage to 12V instead.

Super-Hornet

super-hornet, i will try to set it back to either 12v or so. hope it works. oh by the way, i've got a ampmeter, can i use it to measure the DC 12v. i tried to use it but the meter doesnt show 0. the no just keeps changing strange. i set it to measure DC using probe.

[Super-Hornet]

U can't use Ampmeter to measure voltage without any resistor. I assuming u are refering to multimeter instead. Just switch it voltmeter and measure it. Normal switching power supply is always doing feedback internally to order to maintain a constan o/p. If your O/P fluctuate, then your PS is very lousy or dying off. If yours is a conventional transformer type, then the o/p voltage do fluctuate around.

Super-Hornet

[pilot_bear]

i do not have any problem with my sony ps from koba till now

here is my config:
input: 100-240 ~ 50/60 Hz 1.5A
output : 3-30Vdc 1.5-7A 42W max
pre-set: 12V 3.5A

currently charging between 7.4v - 11.1v lipo, nimh, and lead acid .

my question is
does that means that if i want to charge anything higher then 12v, there will be problem using my PS ?