Control circuit for a fluorescent lamp with a power of up to 26 watts. Scheme, description

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Control circuit for a fluorescent lamp with a power of up to 26 watts. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Lighting

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Many people buy table lamps of various designs: for their desktop, for a computer, they arrange various “backlights”, etc. What if it is not always possible to buy a suitable lamp, so most either use ready-made shops for a long time, or make them themselves - such a lamp as you need.

We know that approximately 25% of the world's electricity is consumed by artificial lighting, which makes this an extremely attractive area for efforts to improve efficiency and reduce electricity consumption. If a conventional incandescent lamp, when turned on, is a constant resistive load, then all gas discharge lamps have negative impedance characteristics that require current stabilization.

In addition, it is necessary to take into account such points as:

resonant mode of operation,
protection in case of lamp failure;
high voltage ignition,
special power bus control.

The main mode, the observance of which is necessary for a fluorescent lamp throughout the entire period of operation, is the current mode, ideally, power stabilization is necessary throughout the entire period of operation of the lamp. As a rule, lamps are powered by AC voltage to equalize the wear of the electrodes in the case of DC power supply, the service life is shorter by 50%. To eliminate all the shortcomings mentioned above, fluorescent lamp control circuits are used.

Control circuit for a fluorescent lamp up to 26 watts

The schematic diagram for controlling a fluorescent lamp with a power of up to 26W is shown in fig. 1. The circuit allows you to control a fluorescent lamp (LDS), while having subminiature dimensions, since it does not use power inverters. Chip DA1 - IC IR51H420 combines in one package IC IR2151 and MIS keys, all this significantly reduces the dimensions of this device.

Attention! The maximum power of the fluorescent lamp used must not exceed 26 W.

After assembling the entire structure, the circuit starts working immediately. The printed circuit board is not shown, since the circuit is not very difficult even for a beginner radio amateur. The whole structure can be assembled by surface mounting and placed in a separate case, and in the manufacture of various "highlights" in the case of the structure of your interior or furniture.

Author: Yu. Zamyatin, (UA9XPJ); Publication: cxem.net

See other articles Section Lighting.

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