1) LED protection and stable brightness
LED is a kind of weak, precision component that will be destroyed if there is a slight overvoltage. In particular, the overcurrent pole and its attention should be noted, although it is within the rated current, but due to the thermal runaway phenomenon caused by self-heating, it will exceed the rated current and destroy the LED. Furthermore, the LED has an error of Vf, and the current flowing through the voltage is greatly different, and the brightness is also different. For this reason, if the LED is generally driven, a constant current line is added to drive it. Moreover, since the voltage for driving the LED is unstable, there are factors such as voltage fluctuation and load fluctuation. Constant Current Diode This is a component that protects the various variations of the LED on the LED.
The CRD products sold by SEMITEC have a good match with LEDs, and can protect the LED from external damage caused by overcurrent, overvoltage, and fluctuations in the number of cycles. Moreover, it is a component that can achieve stable brightness regardless of the error of LED Vf.
2) Stable LED component CRD analysis
The CRD products sold by SEMITEC are components that provide stable current to stabilize LEDs, and are most suitable for lighting components for high-brightness LEDs. CRD is a component that can provide a constant current from a wide range voltage of 1V or less to a high voltage of 100V. That is to say, even if the applied voltage changes, the load impedance changes, or the abnormal voltage is generated, a stable current can be supplied to the load.
In general, the construction of a stable current line is very complicated, it is composed of several parts, and the design is not simple. However, as long as the CRD component is one, the constant current characteristics can be easily realized.
Comprehensive CRD Features â— A wide range of voltages from 1V to 100V can operate.
â— It does not suffer from fluctuations in power supply, load fluctuations, and abnormal voltage fluctuations.
â— Constant current circuit can be realized with a single component, and the assembly area can also be reduced.
â— Although the Vf of the LED has an error, stable brightness can be obtained.
â— If the ambient temperature rises, the current value will become smaller, so the LED can be protected.
â— AC power can also be used when used with a rectifier diode.
And other favorable factors.
CRD series
New item S series
CRD ??æµ???R characteristics
3) Circuit for LED lighting using CRD
When converting to a ball and a fluorescent lamp with an LED lighting structure, the use of SERIMEC (rock? V??) CRD products will bring many favorable factors.
â— Reduce the number of parts compared to using Switching Power (Electronic Power Supply), saving parts, saving space and saving costs.
â—It is not necessary to connect the electrolytic capacitor to smooth the voltage, and it can also be bright and blinking with less stable light.
â— It is not necessary to connect electrolytic capacitors to extend the life.
â— The CRD controls the current in a high temperature environment to protect the LED.
â— If you want to increase the current, you only need to connect the CRDs in parallel.
Circuits for LED lighting using CRD products?
Product specifications consultation:
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