Dragon Tamer
Member
I was gutting an old PC power supply and I stumbled across a curious little part, a UC3843. I thought it was odd that it was connected to 120V DC (since the input voltage was rectified immediately). It's a High performance current mode controller, and it turns out that they're in a lot of things that need a lot of power. I thought it would be perfect for my radio's power supply since I've already maxed the 12.6-0-12.6V 2A transformer for power. I was wondering if I could connect the UC3843 to boost the current that the transformer can supply without increasing the voltage. It's really important because I have 3 parts that get their power from the unregulated input voltage, the 4700uF filter capacitor (max voltage of 35V DC), the 3 12V regulators (7812), and most importantly an LM339 comparator (max voltage of 36V DC). All 3 are supplied a voltage of 34.2V.
So, if I connect the UC3843 to a circuit similar to the one shown in figure 33 in the data sheet, can I boost the output current of the transformer, without boosting the voltage? I will attach a schematic once I finish it.
http://www.datasheetcatalog.org/datasheet/motorola/UC2843BD.pdf
So, if I connect the UC3843 to a circuit similar to the one shown in figure 33 in the data sheet, can I boost the output current of the transformer, without boosting the voltage? I will attach a schematic once I finish it.
http://www.datasheetcatalog.org/datasheet/motorola/UC2843BD.pdf