S805BDN Power Supply Control Board

The S805BDN (also known as S805-BDN) is a power supply control board
commonly used in LED and LCD televisions and monitors. It functions as
a combined power supply and LED driver, delivering stable voltage outputs
for mainboard operation and backlight control.

Core Specifications

• Input Voltage: 100V – 240V AC (universal input)
• Main Logic Output: +12V DC
• Standby Output: +5V DC
• LED Backlight Driver:
  Integrated constant current driver (approx. 30V–100V+ depending on screen size)
• Form Factor:
  Compact single or double-layer PCB for slim display enclosures

Key Connectors & Functions

• AC Input: 2-pin or 3-pin connector for mains power
• Mainboard Interface:
  Multi-pin connector supplying 12V, 5V, and control signals
  • PS-ON / Standby (power activation signal)
  • BL-ON / ENA (backlight enable)
  • ADJ / PWM (brightness control)
• Backlight Output:
  High-voltage connector for LED backlight strips