The design of the filament lamp driving power supply is diversified. The basic principle is small volume, no stroboscopic, THD<20%, PF>0.5--0.7. At present, the LED constant current driving power chip designed and manufactured by domestic local chip companies can be similar to similar products of American companies, and has advantages in performance, price and technical service.
Mingwei Electronics regards the application circuit of linear constant current driving power supply as simple, no inductor, transformer, no electrolytic capacitor, etc. It is more suitable for saving the advantage of manual industrial automation production. Therefore, the company has introduced linear constant current drive for LED filament lamp. Power supply, a kind of application for step-down constant current.
Zhao Chunbo, director of Ming Microelectronics Marketing Department, introduced in the high-tech LED Xiamen tour speech that the company introduced the SM2082C linear constant current drive solution. In addition to the SM2082C main chip, there are only six components, which are very cost-effective. Typical electrical performance parameters for a linear drive power scheme for 8W glass bulb filament lamps.
In addition, the company's SM7313P is a high-precision and high-efficiency non-isolated LED constant current drive control chip. The chip adopts the BUCK circuit structure and works in a fixed frequency mode. It only needs to use a relatively small chip inductor to achieve 5W or less. Small current high voltage output scheme.
"The power board of this solution has a diameter of 15.4mm and a height of 14mm. It can be directly placed in the E14 base. No white plastic kit is needed. When the 30V/20mA filament 2 string 1 is selected, it can support the input range of 100Vac ~ 265Vac." Zhao Chunbo said The SM7313P also features LED output open-circuit protection.
Mingwei Electronics regards the application circuit of linear constant current driving power supply as simple, no inductor, transformer, no electrolytic capacitor, etc. It is more suitable for saving the advantage of manual industrial automation production. Therefore, the company has introduced linear constant current drive for LED filament lamp. Power supply, a kind of application for step-down constant current.
Ming Chun Electronics Marketing Director Zhao Chunbo
Zhao Chunbo, director of Ming Microelectronics Marketing Department, introduced in the high-tech LED Xiamen tour speech that the company introduced the SM2082C linear constant current drive solution. In addition to the SM2082C main chip, there are only six components, which are very cost-effective. Typical electrical performance parameters for a linear drive power scheme for 8W glass bulb filament lamps.
In addition, the company's SM7313P is a high-precision and high-efficiency non-isolated LED constant current drive control chip. The chip adopts the BUCK circuit structure and works in a fixed frequency mode. It only needs to use a relatively small chip inductor to achieve 5W or less. Small current high voltage output scheme.
"The power board of this solution has a diameter of 15.4mm and a height of 14mm. It can be directly placed in the E14 base. No white plastic kit is needed. When the 30V/20mA filament 2 string 1 is selected, it can support the input range of 100Vac ~ 265Vac." Zhao Chunbo said The SM7313P also features LED output open-circuit protection.
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