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Re: LDO vs Non-LDO
No, the dissipated power will be the same. From the formula for power: P=U.I , where U=24-5=19V in both cases, current is the same in both cases => P(power) will be the same. If you want to eliminate heat, try using step-down(buck) converter, for example LM2576.
Hi, I need a high current driver IC, for MOSFET/IGBT. Is it possible to use several drivers, incorporated in a single IC chip, connected in parallel. For example Microchip's TC4468 (4x1,2A). It is supposed that delay times are matched, but some differences may exist anyway. Is it a good idea or...
Everything's fine with the schematic. Obviously, this circuit is used for a synchronization purpose. Pin5 should be connected to +5V (or the positive rail) by a pull-up resistor. The "60Hz" labeled rail, in this case should be considered as an output rail. On that same rail, if observed with...
I'm designing a portable, for non-professional use, multi-chemistry Battery Charger. The device also can be used as Programmable Power Supply. It is based on SMPS. Mains Voltage - 230VAC/50Hz, ,output power - 150W max, consumed AC power - 180W max, cos_ph =0,65-0,70 (measured,currently without...
Please ,can you clarify why soldering is a bad practise? From my practice I can conclude that exactly soldering is the most reliable method. We used to crimp the terminals in the past /automated machine crimping/, but now we solder them. Why? We had quite a lot failed connectors due to oxidized...
Re: Resetting a PIC
From my experience, doing the same thing, I can tell you not to use external RC reset circuit . Activate PWRT and BOR. Under BOR voltage controller will be held at reset state. BOR voltage is about 4V, so with this big capacity /11000uF/,I think you'll have enough time to...
dual secondaries transformer only using one
Thanks FvM ! Transformer is marked 067.039. So, it's the same,I've ordered. You are right about the overview catalogs. In one of them this transformer was noted to be a single secondary 27-30V/3,2A,in other - a double secondary 27-30V. I've examined...
kaschke transformer topswitch
Hi! I'm currently trying to make this SMPS work properly. The problem is that the SMPS doesn't hold on load. It's expected to be 27-30V/3,2A 96W. Everything is fine until load >20W is reached. Then TOP-switch heats up and I think thermal shutdown occurs (actually...
Sorry,but I've missed this,I was assuming that you are using bulbs. The second method I described is not plausible in this case.
Take a look at the schematics.The first one senses current ,the second one utilizes the first method I described.
Do you really need to sense the current flowing through the bulbs? Or you need to check whether the light bulbs aren't burnt out? In case your aim is to control the bulbs /and the whole power elements of the relay/ - it's not obligatory to measure the current directly at all. I can offer you a...
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