Working of the modern Led bulb with transformerless power supply.
Nowadays LED bulbs are very much use instead of incandescent lamps and CFL lamps. LED bulbs are very much efficient than others and very less power is required for its operation. Many types of LED bulbs are available in the market. Let�s learn working principles of LED bulbs which has a Transformerless power supply circuit.
In this post, you will learn how a transformerless power supply works. The circuit diagram of Transformerless power supply is given below. The LEDs are used as a load.
Inside a Modern LED bulb:
Working of Modern LED bulb:
The circuit consists of an X-rated series capacitor which drops the 220-230v AC voltage.And a high value of the resistor (Rp) connected in parallel with the capacitor for discharge the capacitor.
A series resistor (Rs) is used for limit the current.
A bridge circuit using four diodes is used to convert AC to DC.
An electrolytic capacitor is connected in parallel with the output of the rectifier for filtrate the DC.
A Zener diode is used for voltage regulation purpose.
The DC output filtrate by the capacitor and Pure DC.
Read also:
Transformerless Power supply for LED:
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| Led with Transformerless power supply |
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Mr. Muhammad Saqib, M.Sc. (PAK), Research Fellow (PAK), a member of IEEE, is a Fulbright Alumnus and earned his Master’s Degree in Electrical and Power Engineering from University Of Engineering And Technology Taxila, PAKISTAN.
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