Fluorescent lamp driver circuit

This is his website if you want to check out more awesome designs. These capacitors are connected line to line and are designed for high voltage ac circuits. An electronic ballast will convert power frequency to a very high frequency to initialize the gas discharge process in fluorescent lamps. The first part of the circuit includes a ne555 timer ic wired as an astable multivibrator. Lamp isotronic 11w use a little modified wiring, where doesnt exists starting circuit with a diac. The circuit is nothing but consists of an oscillator, a mosfet switch and a stepup transformer for driving the florescent lamp. Figure 1 shows a driving circuit for a fluorescent lamp operated from the 220240v mains.

But 3 circuits of fluorescent driver help you, get ideas projects or learning. Ccfls are often used as inexpensive light units in electrical devices that are powered by direct current sources such as batteries. A fluorescent lamp, or fluorescent tube, is a lowpressure mercuryvapor gasdischarge lamp that uses fluorescence to produce visible light. The vco pin sets the frequency of the halfbridge gate driver outputs, ho and lo pins. How a fluorescent light works schematic animation youtube. Connection of tube light is very simple because it has few wiring points only. I developed this circuit in 1985, and used it to build a lamp that found much use both as camping light and as. This circuit is constructed with timer ic555 as pulse driver for fluorescent light, the timer ic is configured as multivibrator by the timing resistros r1, vr1 and capacitor c1. A linear variable inductor is proposed as means to control the operation of a fluorescent discharge lamp in a load resonant circuit. An1543d electronic lamp ballast design on semiconductor.

A 240v to 10v transformer will work better then the one in the parts list. The transistor bd243c acts as switching trnasistor, here stepdown. I will have to try this with a larger tube and bigger incandescent lamp at some point. You cannot use fluorescent light bulbs with battery 6v, 12v. Principle circuit diagram of a fluorescent lamp driver using a. Each pulse launches about 10 watts of visible light. Build an efficient hid lamp driver circuit electronic design. Watch how the efficiency changes when the tube is driven at a voltage just above its proper voltage drop. There are for example resonances by winding capacities, by coincidence of a tuned circuit with a switching frequency, influence of the lamp capacity, of the leakage flux and saturation properties of the ferrite core etc.

The main component is the xrated ac capacitor, which can reduce the supply current to a suitable amount. This board was already assembled and tested, it need 914vdc battery to drive fluorescent lamp 10 to 40w depend on the current of your battery. The starter is like a key of fluorescent light because it is used to light up the tube. Both backtoback diodes in line together with the lamp circuit are efficiently configured as a zero crossing detector for the lamp current. The board is integrated into the base of a covered cfl lamp. Document resume ed 027 711 ef 002 628 by allphin, willard primer of school lighting lamps and maintenance. Figure 1 shows a complete application circuit using the uc3871 resonant fluorescent lamp and lcd driver. Electronic fluorescent lamp ballast stmicroelectronics. Here is the schematic diagram for a 20 watt driver.

Tube lights are most used light source and here tube light connection circuit and wiring diagram given with explanation. Start it up how fluorescent lamps work howstuffworks. The purpose of this additional driver board is to run a power led edex3la1e1 with a solid power card to evaluate the fluorescent light bulb of the energysaving lamp that is the author of the fluorescent lamp for this you have to add an additional 14 laps to the power cards transformer. An1543d electronic lamp ballast design prepared by. The ucc39723 ccfl controllers provide the necessary circuit blocks to implement a highly efficient ccfl backlight power supply in a small footprint 8 pin tssop package. Output switching pulse is taken from pin 3, this pulse duration can be varied by varying vr1 resistor. Tube light connection diagram shown here is suitable for common type fluorescent tubelight. The basic principles of the most commonly used lamp types. You can see how this system works in the diagram below. Make a lowcost cfl lamp driver electronics for you. Reference design sluu500 april 2011 19w,singlestageacdc led driver for t8t10 fluorescent lamp replacement 1 introduction this reference design, pmp4301, is a singlestagepower factor corrected led driver using texas. An electric current in the gas excites mercury vapor, which produces shortwave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow.

Note that all these links are external and we cannot provide support on the circuits or offer any guarantees to their accuracy. Thankyou to burak incepinar for letting me document his design. Fluorescent lamp starter with driver circuit circuit. Ccfl inverters are small, have switchover efficiency over 80%, and offer adjustable output of light. Starting a fluorescent on an inverter the 12v drivers for fluorescent lamps are tricky, because of the compromise between a good operating. This circuit can give a nasty but not too dangerous shock. Looking yet again to figure 2, be aware the synchronizing potential of the driver. In this circuit, the current passes through the electrodes on both ends of the tube. Gas discharge lamp basics 3 low pressure fluorescent lamp. An electronic ballast or electrical ballast is a device which controls the starting voltage and the operating currents of lighting devices. When the lamp first turns on, the path of least resistance is through the. This simple 6 watt fluorescent lamp driver circuit can be used to operate a 6 watt fluorescent lamp from a 6v supply. The proposed simple fluorescent lamp driver dimmer circuit can be used for controlling luminous intensity of a fluorescent lamp smoothly. Controller ctrl is connected to create a feed back loop.

Firstly, they are very much more efficient than glow lamps, so they produce much more light for less power consumption. It uses a normal 120 to 6v stepdown transformer in reverse, to step 12v to about 350v to drive a lamp without the need to warm the filaments. The circuit uses capacitive ballasting for driving the tube. When it uses 12v battery has consumption current about 300 ma. Simple control circuits for electronic ballast design.

You need an adequate insulation between primary and secondary, and a very good insulation between secondary. See how the ballast and starting switch work to strike an arc in the lamp. Fluorescent driver with 6v, 12v battery and blinking light. Remember that if you stretch it, it becomes thinner. The circuit includes figure 5 the complete control for the halfbridge resonant output stage and the lamp. A familiar and widely used example is the inductive ballast used in fluorescent lamps to limit the current through the. Design goals for a cold cathode fluorescent lamp ccfl converter used in a notebook computer or portable application include small size, high efficiency, and low cost. The lamp current does not correlate in shape with the lamp voltage. Fluorescent lamp driver 12vdc 1040w assembled electronic. A 12 v fluorescent lamp driver is one of the most critical circuits which you can make. Ahead of the lamp strike, the resonant circuit involves l, cl and c2 all in a. The most commonly used electronic drive circuits for fluorescent lamps are voltage fed halfbridge. Resonant fluorescent lamp driver datasheet catalog. Usually everybody expects a voltage drop of 0,7v but this is a value based on the maximum permitted current of the transistor.

A simple, low voltage inverter for fluorescent lamps up to 15 watt. A number of people have been unable to find the transformer needed for the black light project, so i looked around to see if i could find a fluorescent lamp driver that does not require any special components. Fluorescent driver with 6v, 12v battery and blinking light circuit ideas. The advantage of this circuit has a lot of brightness using less energy. A fluorescent lamp driver circuit has regulator sr.

The project can be used at many places where a good portable light is required for example at camping, or in car, boats and many emergency purposes. When the lamp first turns on, the path of least resistance is through the bypass circuit, and across the starter switch. Applications n the circuit topology enables a broad range of ballast applications at different mains voltages for driving lamp types from t8, t5, plc, t10, t12, pll and plt, for example. A ccfl inverter is an electrical inverter that supplies alternating current power to a cold cathode fluorescent lamp ccfl. This instructable will help you run any fluorescent light off low voltages, it has been tested to. The ic provides all drive, control and housekeeping functions to implement ccfl and lcd converters. The circuit hits the small lamp with narrow 1us pulses at a rate of 10khz. The first part of the circuit includes a ne555 timer ic wired as an. When we connect the ac supply voltage to the circuit, then the starter act like short circuited and current flow through those filament located at the first and second end of the tube light and the filament generate heat and it ionized the gas mercury vapor in the fluorescent tube lamp.

An electrical ballast is a device placed in series with a load to limit the amount of current in an electrical circuit. Company confidential power stage resonant lc circuit 8. It uses a normal 120 to 6v stepdown transformer in reverse to step 12v to about 350v to drive a lamp without the need to warm the. Conventional lamp ballast the simplest form of ballast is an inductor. The basic principle behind the 230v led driver circuit is transformer less power supply. Ee 5741 design of electronic ballasts eric persson exec. The input voltage for the design is 170 vac to 254 vac and the lamp voltage is 56v. Fluorescent lamp driver circuit diagram theorycircuit. The classic fluorescent lamp design, which has fallen mostly by the wayside, used a special starter switch mechanism to light up the tube. How to design a dimming fluorescent electronic ballast.

A simple, low voltage inverter for fluorescent lamps up to. A number of people have been unable to find the transformer needed for the black light project, so i looked around to see if. The ic1 tlc 555 is wired as an astable multivibrator for producing the necessary oscillations. This is normal, as the lamp is a strongly nonresistive element, and it has its own impedance. It does this through the principle of electrical gas discharge. Basically, this 4w12v fluorescent lamp driver circuit is a small inverter circuit with very small power output that is about 35w. After the lamp ignites, the lamp voltage drops quickly from the opencircuit voltage to a very low value 20 v typical due to the low resistance of.

The reference design is a compact 7w 230v lamp built around a cfl driver ic uba22at from nxp. Simpe 12 vdc fluorescent lamp driver circuit electronic. I actually tried a defective personal computer power accessory unit, disassemble this and apply certain decent component to this and connect and developed to build a 6v dc 20 watt florescent lamp driver circuit. Fluorescent light wiring diagram tube light circuit. Fluorescent lamp driver 12vdc 1040w assembled electronic circuit board. Share on tumblr construction and working this circuit is constructed with timer ic555 as pulse driver for fluorescent light, the timer ic is configured as multivibrator by the timing resistros r1, vr1 and capacitor c1. How to design a dimming fluorescent electronic ballast by tom ribarich, director, lighting design center, international rectifier power management designline 01292006 11. The 12v drivers for fluorescent lamps are tricky, because of the compromise between a good operating efficiency and the ability to start the lamp. The secondary circuit of transformer tf is coupled to fluorescent lamps u10 and u11 via ballast capacitors c1. Here is a simple and effective circuit for driving florescent lamps from a 12 v supply. The output pulses from the ic are amplified by the transistor q1.

Bicmos cold cathode fluorescent lamp driver controller. Even though the light out of a fluorescent tube has a discontinuous spectrum, the. A 26w electronic ballast circuit without pfc is designed around the irs2526ds mini8 ballast control ic. Driver lamp fault lamp emi filter rectifier output stage control circuit dc bus. The secondary circuit of transformer tf is coupled to fluorescent lamps u 10 and u 11 via ballast. The buck output voltage transformer centertap provides the zero crossing and synchronization signal. The transformer steps up the collector voltage to around 1kvto drive the fluorescent lamp. It consists of two contact strips, one normal and one bimetallic, which are normally open, enclosed in. This circuit can be used to power up a 4w fluorescent lamp from 12v battery. This is a simple 4 w fluorescent lamp driver circuit that can be operated from a 12 v supply. Some circuits would be illegal to operate in most countries and others are dangerous to construct and should not be attempted by the inexperienced. Animation shows the circuit of the first kind of fluorescent lamp called the preheat.