Power supply on a TDA4605 chip, 220/12 volts 4 amps. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Power Supplies
Comments on the article
On fig. 6.16 shows a power supply circuit implemented on an affordable TDA4605 chip. This microcircuit has domestic counterparts K1033EU5, KR1087EU1.
Transformer T1 is wound on the core. Sh16x20 from ferrite 2500NMS1 The value of the non-magnetic gap is 0,12 mm (taking into account the double gap, that is, two gaskets of 0,12 mm each). The number of turns of the primary winding W1 = 64, wire diameter 0,25 mm. The number of turns of the secondary winding W2 = 3, wire diameter (bundle of five cores 0,6 mm). The number of turns of the feedback winding W3 = 3, wire diameter 0,25 mm.
Most electronic transformers have restrictions not only on the maximum, but also on the minimum total power of the connected lamps. This is due to the peculiarities of the operation of internal converters. The permissible power range is indicated in the catalog and on the device case, for example, 35...105 W. This limitation, however, does not mean the danger of the transformer failing in the absence of load (for example, if all the lamps burn out). It only follows from it that the normal operation of lamps with a power less than permissible is not guaranteed.
For the convenience of connecting lamps, electronic transformers usually have several pairs of output terminals. Lamp power control, depending on the specific circuit implementation, is carried out in one of two ways:
- switching on a transformer with a traditional dimmer;
- by applying a special signal to its separate control input (as is the case with adjustable electronic ballasts).
This possibility may or may not be provided at all. When connecting an electronic transformer to a conventional dimmer, it is important to ensure that the latter is capable of handling capacitive loads. Such information is contained in the documentation for the dimmer.
It should be noted that the secondary voltage on their windings is deliberately somewhat reduced compared to the nominal one, and usually amounts to 11,2 ... 11,6 V. This technique somewhat reduces the luminous flux and light output of the lamps, but prolongs their service life.
See other articles Section Power Supplies.
Read and write useful comments on this article.
<< Back
Latest news of science and technology, new electronics:
Machine for thinning flowers in gardens
02.05.2024
In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers.
... >>
Advanced Infrared Microscope
02.05.2024
Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>
Air trap for insects
01.05.2024
Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>
| Random news from the Archive New cable gateways from Netgear
22.02.2014
Netgear has introduced two new cable gateways. The new devices provide, on the one hand, fast Internet access, and, on the other hand, high-speed WiFi, allowing cable network subscribers to get rid of the need to pay for modem rental every month, the company told CNews.
With the release of new devices, Netgear's line of cable modems and gateways includes three devices: the AC1750 WiFi Cable Modem Router (C6300), which combines a cable modem operating at speeds up to 680 Mbps in one device, and a Gigabit WiFi router that provides speeds up to 1750 Mbps; cable modem router N450 WiFi - a gateway that provides cable modem speeds up to 350 Mbps and WiFi speeds in the 2,4 GHz band up to 450 Mbps; cable modem CMD31T DOCSIS 3.0, for direct connection to a high-speed cable network of an Internet provider.
The Netgear N450 WiFi Cable Modem Router is now available at retailers and online stores. MSRP in the US is $119.99.
The C6300 cable modem router will ship in the second quarter of 2014 at a suggested retail price of $219.99.
|
Other interesting news:
▪ Photon from a nanotube
▪ Heating by computers
▪ Magnetic system that converts heat into mechanical motion
▪ HyperCharger X Wireless Charging Mobile Battery
▪ The storm is getting bigger
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ section of the site Assembling the Rubik's Cube. Article selection
▪ article Easier than a steamed turnip. Popular expression
▪ How did you start wearing gloves? Detailed answer
▪ article Educator. Standard instruction on labor protection
▪ article Acoustic telescope. Encyclopedia of radio electronics and electrical engineering
▪ article Device for the protection of three-phase consumers. Encyclopedia of radio electronics and electrical engineering
Leave your comment on this article:
All languages of this page
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua
2000-2024
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese