Am I missing something when it comes to using a L200C. The spec says it can deliver up to 2 amps - I can't get more that 700mA out of one!
I have a stiff source of 32VAC and getting about 40volts DC into the device after rectification and smooting. No matter how I configure the damn thing I cannot achieve a 2A output at
12VDC.I have tried three devices in case one was faulty. A pretty straight forward cct I thought.
Any ideas?
**What is the thermal resistance of your heat sink?
Also, I suggest you examine Figure 3 in this spec sheet:
You're going to need to shed some Volts somewhere.
-- Trevor Wilson www.rageaudio.com.au
"Trevor Wilson"
** Absobloominlutely.You are asking the poor thing to dissipate over 60 watts !!!
The input voltage must be no more than 25V for any chance.
..... Phil
I was missing something alright - attention to detail!! I need to create a few power supplies with 32VAC input capable of 12VDC/2A out. A quick reflection brought to mind the L200C which I used some years ago. So, a quick scan of the spec sheet and my eyes fell on the opening paragraphs, Vi=40; Vimax=60; Dropout 32; Adjustable and 2Amps. Aha, just the thing for my application. Without further ado, I hashed up a birdsnest test cct, hence the no-go situation.
Too much on the mind? Taking things for granted? - no excuses, I cocked up!
Thanks for pointing out the obvious, as per Figure 3. I now have a triac in front of a bridge rectifier to power up the L200C at about 18VDC, it adjusts perfectly to 12V and limits beautifully at 2A.
Regards.
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