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7 Threads found on edaboard.com: Between Two Power Sources
It all depends on V ripple and holdup time. To avoid dropout flicker the holdup time is usually defined for a 1 cycle dropout and thus the cap value for 10% ripple is the difference in Joules storage between the two levels for one mains cycle and not one PFM cycle, so e-caps are essential in the hundred uF range for large power (...)
Dear all, what is the most power efficient way to choose between two power sources? To be more precise, I have a solar panel with a 12vdc output and a 12vdc charger, two sources to charge a 12v battery, and want to be able to automatically select the solar panel as main (...)
I would keep the liine length between the power combiner and the DUT very short. Then I would put at least a 3 dB pad on the two inputs (more is better). You will have some mismatches, but they will be not too big of a problem. At the DUT output, use a 75 ohm pad once again to keep VSWR standing waves to a minimum. Of course, you (...)
If power meter shows negative value that means that power source accepting power. That's not true for the right power meter, because it's connected to measure power flow from left to right. You may want to correct it. With the present phase settings, both sources are sourcing real (...)
Helllo ktec1, If you could tolerate the forward voltage drop in a diode (and I think you can, because you are planning to use a battery to power your circuit) you can simply use a diode in series with each power supply. Switching between power sources will be automatic. Hope this helps and best regards.
U can use DC to DC converters from Minmax or Mornson.other way is to use common mode choke in between of 9Volt and ground.
Dear all, what is the most power efficient way to choose between two power sources? To be more precise, I have a solar powered circuit with a dc regulated output and a rechargable battery, and want to be able to automatically select the best of those two upon voltage (...)