220V LED bulb at home, in fact, the circuit structure can be very simple

220V LED bulb at home, in fact, the circuit structure can be very simple: Zhongshan Wharlgiz Lighting Co.,Ltd supplies LED Ceiling Downlight,LED GFS Bulbs,LED HLW bulbs,ect.

The range of use of LED lights is now quite wide. Now many places are illuminated with LED lights. For example, many new street lights are now illuminated by LED lights. The lights used in our homes are no exception. Many of them are used. LED lights to illuminate, but in fact the cost of LED lights can be very low, the internal circuit structure is very simple, today to share with you a simple 220V bulb production method

Let's first look at the schematic, which is the following figure. From the schematic, we see that there are only a few devices used, there is a resonant capacitor, and there is a rectifier bridge, filter capacitor, current limiting resistor and an LED. Light, this is used for lighting.

 

Many friends may be unfamiliar with this resonant capacitor. Don't look at the schematic diagram. A capacitor and a resistor are connected in parallel. In fact, it is a component. As for the shape, you can refer to the following figure. In fact, its function is to reduce the voltage. You It can also be called a step-down capacitor, but the resistor and capacitor are selected in the schematic diagram. The working principle of the step-down capacitor is to use the capacitive reactance generated by the capacitor at a certain AC signal frequency to limit the maximum operating current, for example, at 50 Hz. The power frequency condition, a 1uF capacitor produces a capacitive reactance of about 3180 ohms. When 220V AC is applied across the capacitor, the maximum current flowing through the capacitor is about 70mA. If a 110V/8W bulb is used with one 1uF capacitors can be matched in series, so we must judge how much buck capacitors need to be connected when using buck capacitors.

The rectifier bridge is well understood. In the previous article, we also explained the function of the rectifier bridge in detail. In summary, the unidirectional conductivity of the diode is used to convert the alternating current into direct current. We are engaged in DIY. It is usually built with rectifier diodes, but most of them are now integrated, so many of the LED lights we see are integrated blocks. To put it plainly, it is a rectifier bridge.

There is no need to introduce more resistors to the back capacitors. The AC power has become DC after passing through the rectifier bridge, but its waveform fluctuation is very large, very impure, but there is no capacitor effect behind the rectifier bridge. The same, the use of capacitor charge and discharge can be easily judged that the waveform becomes a lot smoother, as the latter resistor is purely used to limit the flow, to prevent the LED lamp bead burned.

Adding these components to a 220V LED light is done, is it easy to feel? We only analyzed this relatively simple, in fact, the cost of LED lights can also be very high, for example, the LED lights we share are actually stroboscopic, in order to make an LED lamp without stroboscopic, the cost will be A lot higher.

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