50w electronic ballast circuit diagram

Published:2014/3/2 20:39:00 Author:lynne | Keyword: 50w electronic ballast circuit diagram, IN4007, C3093, AC220V | From:SeekIC

This circuit shows the electronic transformer, input AC220V, output is AC12V, power up to 50W. It is primarily developed out on the basis of high-frequency electronic ballast circuit on a transformer circuit, stable performance, small size, high power, thus overcoming the traditional silicon steel transformer body big, bulky, price higher shortcomings. Circuit is shown below. It works similar to the switching power supply, a diode bridge rectifier VD1 ~ VD4 constitute the mains into DC, high frequency oscillation circuit from oscillating transformer T1, the transistor VT1, VT2 composed of the pulsating DC into high frequency current, and then the iron Oxygen output transformer T2 high-frequency high-voltage pulse pressure, to obtain the desired voltage and power. R1 is a current limiting resistor. Resistor R2, capacitors C1 and bidirectional trigger diode VD5 constitute started trigger circuit. Transistor VT1, VT2 selection S13005, the B 15 to 20 times. C3093 can also be used, such as BUceo> = 35OV the power transistor. Trigger diode DB3 about VD5 use 32V or VR60. Oscillation transformer can be made with the audio-wound toroid on H7 X 10 X 6's. TIa, T1b 3 turns around, Tc around a turn. Ferrite output transformer T2 also need self-control, core selection of side length 27mm, width 20mm, 10mm thick EI type ferrite. T2a with a diameter of 0.45mm high strength wire wound 100 turns, T2b around with a diameter of 1.25mm high strength wire 8 turns. Selection IN4007 diode VD1 ~ VD4 type, two-way trigger diode DB3 type selection, selection of polypropylene capacitors C1 ~ C3 Polyester capacitors, voltage 250V. When the circuit work, A point of working voltage of about 12V; B point about 25V; C point about 105V; D point about 10V. If the voltage does not meet the above values, or the circuit does not oscillate, you should check whether the fault circuit welding, weld or Weld. Then check VT1, VT2 is good, T1a, T1b phase is correct. After the success of the entire circuit alignment, can be loaded with a small box made of metal material, made conducive shielding and heat dissipation, but must pay attention to insulation circuit and housing. Cited, the change in T2 a, b two coil turns, you can change the high-frequency voltage output. 50w electronic ballast circuit diagram shown in Fig. :



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/50w_electronic_ballast_circuit_diagram.html

Print this Page | Comments | Reading(3)