Outdoor LED street lamp power supply system is different from the traditional light source, LED by realizing the constant current drive power, is to guarantee the normal work of a large foundation, a simple method of switch power supply damage often a LED device.
So how to make tightly compressed together a group of LED security, is also an indicator used in outdoor LED street light efficiency.
LED to the requirement of the drive circuit is can ensure constant current output characteristics, because the LED forward junction voltage relative changes at work area is very small, so to ensure the LED drive current constant is basic guarantee for the LED constant power output.
For the present situation of the power supply voltage is not stable path LED street lamp driver circuit with constant current output characteristics is very necessary, can ensure the super power of the light output constant and avoid the LED brightness.
Outdoor LED street lamp to make the LED driver circuit presents constant current characteristic, from the output end of the drive circuit to look inward, and the output impedance in must be high.
When load current is also through this output impedance, so getting the right solution is to adopt active electronic switch circuit or using high frequency current, can ensure the normal use.
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