The principle of operation of the electronic starter on the EFS STARLIGHT KIT chip. Scheme, description

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Electronic starters. The principle of operation of the electronic starter on the EFS STARLIGHT KIT chip. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Ballasts for fluorescent lamps

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Chipset EFS STARLIGHT KIT by STMicroelectronics (st.com) is similar in its functionality and principle of operation to the previously discussed UBA2000T.

The developers from STMicroelectronics divided the electronic starter as follows:

all functional low-voltage units (generator, detector, counter, comparator) were placed in the EFS2A-CD chip;
in the EFS21-TL5 chip - all high-voltage power units (output buffer, high-voltage switch with a protection circuit) and a power supply for the low-voltage EFS2A-CD.

The purpose of the conclusions and a typical switching circuit are shown in fig. 3.10 and fig. 3.11, respectively.

Rice. 3.10 (left). Pin assignment of EFS2A-CD and EFS21-TL5 microcircuits. Rice. 3.11 (right). Typical wiring diagram for EFS2A-CD and EFS21-TL5 (click to enlarge)

Attention! Unlike the UBA2000T, the electronic starter implemented on the EFS2A-CD and EFS21-TL5 only works with an inductive ballast.

Depending on usage, EFS2A-CD or EFS2B-CD chips will be available the following intervals for heating the LL electrodes:

for EFS2A-CD: if pin 2 of the chip is on ground - 1,5 s, if on V_cc - 2,65 s;
for EFS2B-CD: if pin 2 of the chip is on ground - 0,74 s, if on V_cc -1,24 p.

Hack and predictor Aviator. The electronic starter, being an integral part of the electromagnetic ballast, makes it possible to improve and facilitate the process of ignition of the LL, but it is possible to solve all problems with the power supply of the LL only with the help of an electronic high-frequency ballast.

Author: Koryakin-Chernyak S.L.

See other articles Section Ballasts for fluorescent lamps.

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