This technical document shows how to use the integrated circuit TSM108, the PNP power bipolar transistor STN790A, or the P channel power MOSFET STS3DPFS30, the NPN power bipolar transistor STSA1805 and the diode 1N5821 in order to design and realize a CCFL application.
This document details how to design a CCFL backlighting application using specific STMicroelectronics components: the TSM108 controller, PNP transistor STN790A or MOSFET STS3DPFS30, NPN transistor STSA1805, and diode 1N5821. The guide focuses on a 'ROYER' topology for driving compact fluorescent lamps.
After striking, the tube typically works with a frequency around 25-50KHz to increase light efficiency.
In CCFL tubes, the voltage between the lamp electrodes reaches up to 1300V during start-up.