august 2009 ? 2009 fairchild semiconductor corporation www.fairchildsemi.com fan7318b ? 1.0.0 fan7318b ? lcd backlight inverter drive ic fan7318b lcd backlight inverter drive ic features ? 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 applications ? lcd tv ? lcd monitor description the fan7318b is a lcd backlight inverter drive ic that controls p-n half-bridge topology. 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. ordering information part number operating temperature package eco status packing method FAN7318BM rail FAN7318BMx -25 to +85c 20-lead, small outline integrated circuit (soic) rohs tape & reel for fairchild?s definition of eco status, please visit: http://www.fairchildsemi.com/com pany/green/rohs_green.html . protected under u.s. patent no. 5,652,479.
? 2009 fairchild semiconductor corporation www.fairchildsemi.com fan7318b ? 1.0.0 22 fan7318b ? lcd backli g ht inverter drive ic typical application circuit (lcd backlight inverter) application device input voltage range number of lamps 22-inch lcd monitor fan7318b 15v 10% 4 1. features ? high-efficiency, single-stage power conversion ? p-n half-bridge topology ? reduces required external components ? enhanced system reliability through protection functions 1timer cmp adim ct olr2 olp1 olr1 olp2 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 ref bct bdim ena gnd outb olp3 olp3 olp4 olr4 vin outa bdim ic1 figure 64. typical application circuit
? 2009 fairchild semiconductor corporation www.fairchildsemi.com fan7318b ? 1.0.0 23 fan7318b ? lcd backli g ht inverter drive ic physical dimensions 0.10 c c a see detail a notes: unless otherwise specified 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. e) landpattern standard: soic127p1030x265-20l pin one indicator 0.25 1 10 b ca m 20 11 b x 45 8 0 seating plane gage plane detail a scale: 2:1 seating plane land pattern recommendation f) drawing filename: mkt-m20brev3 0.65 1.27 2.25 9.50 13.00 12.60 11.43 7.60 7.40 10.65 10.00 0.51 0.35 1.27 2.65 max 0.30 0.10 0.33 0.20 0.75 0.25 (r0.10) (r0.10) 1.27 0.40 (1.40) 0.25 d) conforms to asme y14.5m-1994 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 ver ify 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 www.fairchildsemi.com fan7318b ? 1.0.0 24 fan7318b ? lcd backli g ht inverter drive ic
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