AN2654的CCFL背光半桥拓扑L6574和STD7NS20上的基础

AN2654的CCFL背光半桥拓扑L6574和STD7NS20上的基础

AN2654
Application note
CCFL backlight half-bridge topology based on L6574 and
STD7NS20

Introduction
Cold cathode fluorescent lamps (CCFL) are widely used in the backlighting of television and
PC monitor applications due to their low cost and high efficiency. A 12 V or 24 V DC voltage
is provided for the backlighting inverter to drive the CCFL. In order to improve the efficiency
and performance of the total system both for the AC-DC power supply and inverter,
STMicroelectronics has introduced a high-volta