LCD Monitor Inverter Board | Input-Output Voltage for the CCFL Backlight Bulb

CCFL stands for Cold Cathode Fluorescent Lamp. Its function is to light up the LCD monitor screen when a high-frequency current is passed through it.

The power circuits of this lamp are present in the monitor's inverter board, also called the SMPS board. It is called the inverter because it converts low-voltage DC input to high-voltage AC output.

To light up the backlight, you need a 12V DC input. The SMPS board then converts it to a high-voltage AC output in the range of 800-1000 volts. This in turn powers the backlight bulb.

Source Website

SMPS Electronics - A to Z Inverter Board Circuits

Power Supply Electronics Books - Top 5 Books on SMPS Design, Troubleshooting and Power Electronics

Power electronics is an interdisciplinary mix of electrical & electronics engineering.

At its core, it deals with the conversion and supply mechanics of delivering the right amount of voltage, to the right component, in a manner that is both precise and automated.

This technology is used in everything from SMPS circuit boards in computers to large-scale electrical transformers in power plants.

Here's my own list of Top 5 books in the field of SMPS & power electronics:

1. Switching Power Supply Design by Abraham Pressman, Keith Billings & Taylor Morey

2. Fundamentals of Power Electronics by Robert W. Erickson & Dragan Maksimovic

3. Power Electronics: Converters, Applications and Design by Ned Mohan, Tore M. Undeland

4. Troubleshooting Switching Power Converters by Sanjaya Maniktala

5. Power Supply Cookbook by Marty Brown

For full case studies, visit

SMPS Electronics - Power Electronics Course for Engineers

(Intermediate to Advanced Electronics Training)