Led Tv Backlight Driver Circuit Diagram. Sailen das tv reaparing 53 599 views. LED failure open and short circuit detection STEVAL-ILL020V1 STEVAL-ILL021V1 Typical Applications.
Circuit diagrams tv lg ch. The OB3350 is a LED Driver IC that is commonly used in powering the backlight of LCDLED displays or to drive sensitive LEDs at constant current. Because in a 12V LED strip there are 3 LEDs and a resistor in series supplying 11V instead of 12V is a bit like reducing the voltage for each LED by 025V.
This device provides the various voltages we need to test backlight led arrays or single led s.
Led tv is the same as lcd tv the only difference is that lcd tv uses ccfl as backlight and inverter as driver board but led tv uses leds as backlight and boost driver board as driver. If any LCD LED TV getting backlight failure we can not see the picture on the TV display. Figure 2 shows the block diagram of an LCD TV power supply with RGB LED backlight design. As shown in Figure 3 the backlight driving circuit consists of three power converters.
