# Tag Info

## Hot answers tagged power

4

This datasheet says that the recommended input voltage is 30V, but doesn't specify that it should be 60V across the whole thing. It does say that it can take a +/- 30V input, however, so we assumed that was acceptable. Right next to the line that says +/- 30 V is the maximum applied to the input pins is a line that says +/- 16 V is the maximum to be applied ...

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The joule rating is the maximum energy of a single voltage surge event as determined using a specific testing procedure. If the protection is is provided by a varistor, there is a correlation between the life of the varistor and the number of times that it experiences a transient that causes it to dissipate energy. However there does not seem to be a ...

2

A couple of things: Your circuit shows an N channel MOSFET, so you probably want to have it as a low-side switch, instead of high side one--like you currently show. You need a series resistor with that LED to limit the current flowing through it. The switch is OK, but you may want to add a pull down resistor from gate to GND to make sure the NMOS is OFF ...

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A few alteration to the circuit could be done. Somethings like this. NOTE: Putting n-channel MOSFET near to ground is recommended. LED is a diode basically, whose voltage drop depends on the color(red:1.2V, green and blue: 3.3V), so a resistor in series has to be provided for LED not to get damaged. If you are using 2-3mm LED(those small through hole LED), ...

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Indeed, deco caps should be closest to the point of load, and on a micro with multiple power connections your caps should be adjacent each (in a perfect world). The goal is to limit the stray inductance between source and load, in this case between the capacitor and the micro.

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Power triangle: - Real power supplied to the load is on the lower axis but, because not all loads are purely resistive, the apparent power may be larger. This is because (in a simple sinusoidal situation): - $$\text{Apparent power} = V_{RMS}\times I_{RMS}$$ Whereas as actual power consumed (Real power) is: - \text{Real power} = V_{RMS}\times I_{RMS}\times ...

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The joule rating of a surge protector actually is related to both longevity and max capacity. The rating gives the amount of energy it can dissipate, whether that is during one surge or over several surges before it fails. When that rated amount of energy has been dissipated, the circuitry will have be worn out and most likely not be able to protect your ...

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Thyristors as an assembly often have snubber's across anode and cathode to protect them from dv/dt, as in voltage spokes due to inductive loads. The snubber is normally a capacitor less than 0.5 uF in value in series with a relatively low ohm 1 to 10 watt resistor. Capacitor is often rated 3 times line voltage, or more. This causes a substantial leakage ...

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Parallel is fine if you use schottky diodes to OR them. If the 0.25V Vf drop is too much for application, use ideal diodes such as LM66100 (see datasheet for proper configuration when using two of them). With resepect to the voltages, you'd be much better off using components that work down to 2.5V than to use a boost (or buck) converter. With smart low-...

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