It is understood that the recently launched thyristor dimming led power ic chip is SM7720P, SM7722P, SM7724P. (4OOO 336 5I8) Dimmable switching power supply LED lighting driver product series, the system can choose PWM dimming, analog and 0-10V dimming, thyrist dimming, switch dimming and other dimming methods.
SM7724P is a high-precision LED constant current driver chip that supports thyristor dimming. It is used in non-isolated LED power system and is suitable for AC voltage input in the full range of 85Vac~265Vac.
The valley switch is used to control the primary MOS tube to achieve low switching loss 0.3V primary side current sampling reference voltage, connect the sampling resistance with smaller resistance value, smaller conduction loss.
From the perspective of the drive scheme, the LED filament power supply is divided into three categories: resistance and capacitance voltage reduction; Linear constant current; IC constant current. From the structural point of view, the LED filament power supply is divided into two categories: all-glass non-plastic parts; With plastic parts. Among them, non-plastic parts also need to distinguish the type of lamp holder, such as E26/E27/B22 is a class; E14/E17 is another category.
MOJAY M8900 is a LED constant current control chip with primary side feedback and single stage active PFC with high precisionThe M8900 integrates a single-stage active PFC line to achieve a higher power factor and a very low total harmonic distortion, and the chip can enter a quasi-resonant mode, thus achieving higher efficiency and reduced switching losses.
LED chips occupy the main part of the cost of LED lights, so the main way to reduce the cost of LED chips is to reduce the cost of LED chips.
Several well-known semiconductor companies produce LED driversIC, which includes PI, ST, NXP, Maxim, Fairchild, Taiwans manufacturers, and domestic brands. For high-end applications, well-known brands of IC products are usually selected.
At present, the main manufacturers of LED display driver chips are TOSHIBA (Toshiba), TI (Texas Instruments), SONY (SONY), MBI{Ji Ji technology}, SITI (point crystal technology) and so on. In the domestic LED display industry, these chips have shouldYes. TOSHIBA products are more cost-effective and have the highest market share in the domestic market.
LED control IC is mainly used in full-color gradient dimming control of guardrail lights, LED decorative lights, landscape lights and other RGB full-color light source lamps synchronous scanning, full-color color control.
General purpose chips are generally used for low-end LED display products, such as indoor single and two-color LED display screens. The most commonly used general-purpose chip is the 74HC595, which has an 8-bit latch, serial-and-shift register, and three-state output. Maximum output current of 35 mA per circuit (Not constant current). General IC manufacturers can produce such chips.
Commonly used LED drivers are determined according to different W numbers, and there are a lot of driver schemes now, and some different driver ics will be limited according to customer requirements.
CreeInc. is a semiconductor company headquartered in North Carolina, United States, founded in 1987, is one of the world's largest LED chip manufacturers.
Here is to introduce the top ten in ChinaLarge LED manufacturers ranking. SAN An Optoelectronics is the largest LED chip manufacturer in China, and its products cover LED chips, LED packaging, LED lighting and other fields.
Taiwan LED chip manufacturers: Epistar for short, (Lianquan, Yuan Kun, Yonglian, Guolian), Huga, Genesis Photon, Arima photoelectric for short: AOC, Tekcore, Qili, Juxin, Hong Guang.Light Lei (ED), Ding Yuan (Tyntek) abbreviation: TK, Yaofu Island technology TC, Can yuan (FormosaP/GaAs.
LED chip to do a good CREE, Nichia chemical (Nichia), Osram (Osram), Pry and so on. Our company's good general use of CREE, Purui chip, low and medium use of Sanan photoelectric, Shilanming core, Di source photoelectric and so on the following website may be able to help you.
The LED chip used is different: COB light source is mainly less than 1 watt of low-power LED chip, a very small number of COB light source will also use more than 1 watt of high-power LED chip; The LED integrated light source is generally a large size of more than 1 wattHigh-power LED chip, chip size is generally more than 30MIL.
LED chip in 2833523014 refers to the size of the chip, the size can be customized, this is just the general common specifications (mil is a unit of size, a mil is one thousandth of an inch, 40mil is almost 1 mm), so can not only this to determine the better or worse.
Korean brand Samsung lamp beads, currently belong to cost-effective products, Chinese brands, such as Taiwan's crystal Yuan, Guanghong, etc., are in the low-end inside the excellent products, more suitable for the low-end market.Domestic SAN 'an and many other brands, is the current low-end market mainstream products, cheap, moderate performance.
General purpose chip General purpose chip is generally used for low-grade LED display products, such as indoor monochrome screen, two-color screen and so on. The most commonly used general-purpose chip is the 74HC595. The 74HC595 features an 8-bit latch, series-parallel shift register, and three-state output. The maximum output current of each channel is 35mA (non-constant current). General IC manufacturers can produce such chips.
LED driver chip can be divided into general chip and special chip two. The so-called universal chip, the chip itself is not specifically designed for LED, but some logic chips with some logic functions of the LED display (such as series-and-shift registers). The special chip refers to the driver chip designed specifically for the LED display according to the LED luminous characteristics.
LED display 245,138,4953,5024 and other chips function as follows: 245 is to control transceiver, for input and output. Enhance the output driving ability of single chip microcomputer. 138 is decoded, which can save ports, because the led display uses more pins, and can not be connected without decoding.
LED driver chips can be divided into general purpose chips and special chips. General purpose chips are generally used for low-end LED display products, such as indoor single and two-color LED display screens. The most commonly used general-purpose chip is the 74HC595, which has an 8-bit latch, serial-and-shift register, and three-state output.
Driver problem. Each row or column is not displayed, that is, the corresponding driver circuit (chip) problem, and the replacement can display the problem. long-termLED display may be damaged and aging, repair and replacement can be done.
and a built-in shaker for PWM function. DM412 and MOJAY, M8914, M8910 are LED driver chips with pulse width modulation PWM output and enable control, designed for LED lighting, LED display, decoration and other applications.
LED display in the 245,138,4953,5024 chip functions as follows: 245 is to control transceiver, for input and output. Enhance the output driving ability of single chip microcomputer. 138 is decoded, which can save ports, because the led display uses more pins, and can not be connected without decoding.
Its interior is two CMOS tubes, 3-pin VCC, 4-pin control foot, 2-pin control 8-pin output, 4-pin control 6-pin output, only when the 4 pin is "0", 6 will output, otherwise the output isHigh resistance state. TB62726 function: LED driver chip, 16-bit shift latch. Pin 1 GND, power source.
HC138D for LED bit selection, 74HC04 inverter 74HC595D 8-bit shift latch, each chip controls 8 columns of LED pixels. 74HC4953 row drive tube, each chip controls 4 rows of LED pixels. Full color is more, not a list, need to find me.