As the LCD screen itself does not have a luminous function, it is necessary to add a lighting system behind the LCD screen, which consists of luminous components, light guide plates, and backlight power supply. The power of the TV backlight power supply is generally 100-500W, and its function is to convert the AC voltage of the mains into a 12V DC voltage output, thereby supplying power to the display. Due to the presence of a DC-DC voltage converter on the motherboard inside the monitor to obtain a voltage of 8V/5V/3.3V/2.5V, the 12V DC voltage output from the power supply can meet the requirements of the monitor's operation. The general topology structure will use PFC, LLC, SR, Falyback, BOOST+CC/CV topology, etc.
The ultra-thin appearance of the new generation TV poses a challenge to the miniaturization and lightness of backlight power supply. Lingxun provides the most diverse surface mount high-voltage and low-voltage MOSFETs, with good EMI and excellent thermal performance.

Circuit diagram

Recommend part NO.:

PFC

COOL MOS: 

Fly black

COOL MOS: 

LLC

COOL MOS: 

Boost

M&L MOS: 

Sr

M&L MOS: 

M&L MOS: 

M&L MOS: