A linear frequent present-day LED driver circuit layout
Vz1, Vz2, VQ1, VQ2, R1, R2 sort a linear regular present resource, it guarantees that basically the existing movement for the duration of each and every white LED very same, uniform brightness.The LED driver taking electric powered lead rectifying filter, take deal with of LED DC voltage, with out the want in direction of LED Fluorescent Brand phase-up or move-down process, therefore the electrical power inspiration circuit is uncomplicated, and the electricity Present with significant overall performance.Retain the services of LED significant-brightness white LED (operating voltage number: 3 ~ 3.2V), taking 94 LED LED sunlight lamp bulbs.
In this article, a linear continuous present useful resource circuit investigate of the performing strategy, circuit utilizing complementary finishes of consistent existing resource design.
Complementary finishes of the continual present-day useful resource circuit
Transistor regulator tube VQ1, Vz1 and R1 is composed of a continuous recent useful resource, the consistent recent useful resource in direction of the more details zener diode Z2 is in direction of LED Par Gentle offer you a sound doing work present-day, and the transistor VQ2, a voltage stabilizing tube Vz2 and R2 represent an additional consistent present-day resource in the direction of a voltage stabilizing tube Vz1 solid performing latest.Considering the fact that the 2 continuous present-day resource are sound facet voltage regulator tube doing work place, thus that the strong voltage Vz1 and Vz2 and flows during the continual present-day product amount latest shall not difference, which can be certain the doing work latest stream all through the LED continuous.
The marriage amongst recent and voltage:
We hire the LED lamp is 0.06 W LED, doing the job present-day of 20mA, for benefit of design and style, quantity of the circuit aspects are extensively symmetrical, parameters are as follows:
The about parameter (1) model obtainable:
Regular present-day resource circuit presents present-day of 20mA, fulfill the benchmarks for beads.
2 experimental success and study
Attempt wiring, by way of altering the autotransformer towards variation the voltage in direction of simulate the variance of the grid voltage.As a result of simulating the fluctuation LED Flood Lamp of community voltage, check out the consistent present-day regulate circuit within the serious electrical community working attributes, uncovered the LED operating latest no matter if with the exterior voltage fluctuations which take place weighty fluctuations, and this circuit underneath substitute voltage overall performance and LED junction climate of the true verify.
LED in advance present may differ with the enter voltage modifications within just the functions of
LED lamp string operating present and voltage connection curve.
