Automobile ULF on the TDA1562Q chip. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Automotive power amplifiers
Comments on the article
I want to offer my version of a powerful ULF on the TDA1562Q chip (see. Fig.) My version is an improved circuit from the publication. A detailed description of the TDA1562Q chip can be found in the ULF reference books.
The mute mode "MUTE" is more correctly turned on with the SA2 button (output of 16 m/sh. to the case). Then the ULF is not completely turned off, but only the output to the speakers is turned off. Switch SA1 is convenient to turn on and off the ULF. Since the microcircuit consumes only 1 μA in the "STANDBY" mode, the outputs 9,10 of the microcircuit can always be kept energized without fear of discharging the batteries. In this case, there is no need to switch power circuits and any small-sized switch can be used as SA1.
VD2 "On ULF", R5 and SA2 "FAST MUTE" have been added to the circuit. The printed circuit board remains unchanged, as in. Details SA1, SA2, VD1 and VD2 are displayed on the front panel of the ULF and are connected to the board by means of a mounting wire. The output power (load 4 ohms) when powered by a car network reaches 50 watts.
Editorial recommendation. It is desirable to increase the capacitance C7 to 0,47 ... 1 μF, and in series with the power circuit to introduce a 5 A fuse (it will save the microcircuit in case of possible malfunctions of the car generator: TDA1562 withstands 30 V in STANDBY mode, and in operating mode a maximum of 18-19 AT).
Author: Roman Korsunov; Publication: cxem.net
See other articles Section Automotive power amplifiers.
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 Bioactive coating for bone implants
20.02.2021
Scientists from the University of Macau and Nanjing University, China, in collaboration with the National Dental Center of Singapore, have developed a bioactive coating that can be chemically bonded to the surface of titanium, a metal commonly used in bone implants, to protect bone from inflammation.
Osteoporosis is a disease in which bone tissue becomes less dense and very fragile. In addition to the fact that the pathology affects the condition of the bones, it also impairs the function of titanium bone implants. Because there is less bone at the implant site, implants can easily become loose, often resulting in inflammation.
A bioactive coating made from a chemically modified glycan (chain of sugars) can consistently "turn on" and "off" inflammation on bone implants. In the setting of osteoporosis, it first turns on "good inflammation", instructing human macrophages to release molecules that can activate bone cells and promote healing. When bone cells grow and function to a certain extent, they naturally release an enzyme called alkaline phosphatase to separate the chemically modified glycan from the titanium surface. This "sugar bullet" can kill macrophages after they've done their job.
The main advantage of this coating is to maximize the capacity of the limited number of bone cells around osteoporotic implants.
|
Other interesting news:
▪ Gravitational waves fixed
▪ Cabin for communication with a hologram of the interlocutor
▪ Smart glasses Recon Jet HUD Pilot Edition
▪ Speed record in 5G network from Ericsson
▪ Two Families of Inexpensive High-Speed USB Controllers 18.03.2005/XNUMX/XNUMX
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ site section Electric motors. Article selection
▪ article You can't fly from a good life. Popular expression
▪ article What is made of celluloid? Detailed answer
▪ Purchasing manager article. Job description
▪ article Quad-channel home theater amplifier with LG player remote control. Encyclopedia of radio electronics and electrical engineering
▪ article Icelandic proverbs and sayings. Large selection
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