FAN7318B LCD Backlight Inverter Drive IC Features Description The FAN7318B is a LCD backlight inverter drive IC that controls P-N half-bridge topology. High-Efficiency Single-Stage Power Conversion Wide Input Voltage Range: 6V to 30V Backlight Lamp Ballast and Soft Dimming Minimal External Components Required Precision Voltage Reference Trimmed to 2% Half-Bridge Topology Soft-Start PWM Control at Fixed Frequency Analog Dimming Function Burst Dimming Function Programmable Striking Frequency Open-Lamp Protection Open-Lamp Regulation Over-Voltage Protection Short-Lamp Protection CMP-High Protection Thermal Shutdown 20-Pin SOIC The FAN7318B provides a low-cost solution and reduces external components by integrating proprietary wave rectifiers for open-lamp protection and regulation. The operating voltage range of the FAN7318B is wide, so an external regulator isn’t necessary to supply the voltage to the IC. The FAN7318B provides various protections, such as open-lamp regulation, over-voltage protection, open-lamp protection, short-Lamp protection, CMP-high protection, to increase the system reliability. The FAN7318B provides burst dimming and analog dimming. The FAN7318B is available in a 20-SOIC package. Applications LCD TV LCD Monitor Ordering Information Part Number FAN7318BM FAN7318BMX Operating Temperature -25 to +85°C © 2009 Fairchild Semiconductor Corporation FAN7318B • 1.0.2 Package 20-Lead, Small Outline Integrated Circuit (SOIC) Packing Method Rail Tape & Reel www.fairchildsemi.com FAN7318B — LCD Backlight Inverter Drive IC June 2011 Application Device Input Voltage Range Number of Lamps 22-Inch LCD Monitor FAN7318B 15V±10% 4 1. Features 20 19 18 17 16 15 14 13 12 11 OLP1 OLR1 OLP2 OLR2 OLP3 OLP3 OLP4 OLR4 VIN OUTA TIMER CMP ADIM CT REF BCT BDIM ENA GND OUTB 2 3 4 5 6 7 8 9 10 BDIM 1 High-Efficiency, Single-Stage Power Conversion P-N Half-Bridge Topology Reduces Required External Components Enhanced System Reliability through Protection Functions IC1 FAN7318B — LCD Backlight Inverter Drive IC Typical Application Circuit (LCD Backlight Inverter) Figure 64. Typical Application Circuit © 2009 Fairchild Semiconductor Corporation FAN7318B • 1.0.2 www.fairchildsemi.com 22 13.00 12.60 A 11.43 20 11 B 9.50 10.65 7.60 10.00 7.40 2.25 1 0.51 0.35 PIN ONE INDICATOR 1.27 0.25 M 10 0.65 1.27 C B A LAND PATTERN RECOMMENDATION 2.65 MAX FAN7318B — LCD Backlight Inverter Drive IC Physical Dimensions SEE DETAIL A 0.33 0.20 C 0.75 0.25 X 45° SEATING PLANE NOTES: UNLESS OTHERWISE SPECIFIED (R0.10) GAGE PLANE (R0.10) 0.10 C 0.30 0.10 0.25 8° 0° 1.27 0.40 SEATING PLANE (1.40) DETAIL A A) THIS PACKAGE CONFORMS TO JEDEC MS-013, VARIATION AC, ISSUE E B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS DO NOT INCLUDE MOLD FLASH OR BURRS. D) CONFORMS TO ASME Y14.5M-1994 E) LANDPATTERN STANDARD: SOIC127P1030X265-20L F) DRAWING FILENAME: MKT-M20BREV3 SCALE: 2:1 Figure 65. 20-Lead, Small Outline Integrated Circuit (SOIC) Package Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2009 Fairchild Semiconductor Corporation FAN7318B • 1.0.2 www.fairchildsemi.com 23 FAN7318B — LCD Backlight Inverter Drive IC © 2009 Fairchild Semiconductor Corporation FAN7318B • 1.0.2 www.fairchildsemi.com 24