LED Lighting driving principle
This is a licensed patent circuit, but the authorization does not mean that the circuit design is scientific, of course, one can get a circuit patent licenses are likely to have its own unique novelty. This very simple circuit, but it has been debated. Map component parameters for reference only.
But this circuit work? Effective? Please express their views. If this is a valid design, what kind of component parameters in order to make a lower cost but will not damage LED then?
In the utility model patent "a low-cost high-performance LED lighting circuits," presented a "steady flow" of this new concept, if this concept was recognized experts in the case, this concept can be said from the electronics point of view, "filled a conceptual gaps ", although it previously, and there is not much use.
First, the "filter" and "regulator"
After the AC power supply, there is the need for AC variable DC. From the AC to get a DC power supply, we first have to be rectified, but it got rectified output voltage is half-sine wave, and so there is a simple way is to parallel a capacitor at the output, will save up charge, and this is filtering. For the less demanding load on the power supply fluctuations, as long as the filter on the line, but for the right voltage of the battery voltage is required to achieve similar in nature to the circuit, the filter may fail at but must be regulated.
The best active filter circuit filter circuit can be similar to a DC power supply, but it still is not a regulated power supply. Because it is close to the DC output voltage while, but it will increase with the input AC voltage and the rise, with the load current increases. However, the output voltage of power supply there will not be such a change.
A simple regulated power supply, in order to ensure the stability of the output voltage when the input voltage rises, it will have a surplus of electricity consumed by the regulator circuit, therefore, regulated power supply may have a fever, and fever will have to filter the power of small much more.
2, "steady flow" and "constant" in some electronic circuits as a result of a need, we need to provide constant steady current, rather than a stable voltage, and thus a "constant current source."
But there is a class of components, it does not allow larger fluctuations in current, which is not over-current, but it can also be a smaller current work, such as the LED is such a component. At this time we only have to provide it with virtually no fluctuations in the current on-line, and that there is no filtering action of the current source is called the "steady flow source" to make such current or currents into such current is called "steady flow."
Three or four concepts of contrast
"Steady flow" and "filter" very similar, but different is that steady flow targeted at current, while the filter is for voltage; "constant" and "regulator" very similar, but is equally different, constant stream targeted at the current, and voltage regulators targeted at.
"Steady flow" With the input current increases, and increase the output current; "filter" With the input voltage increases, while the higher output voltage.
"Constant" input current increases to upgrade the input voltage, but the output current change; "regulator" input voltage changes, the output voltage constant.
Note: This is referred to in such "steady flow circuit" is patented "a low-cost high-performance LED lighting circuit" (Patent No. 200,520,136,423.2) made, whether it be verified first. Other "Steady Flow Circuit" generally refers to tunable "constant current circuit."
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