FAN7319 LCD Backlight Inverter Drive IC May 2011 FAN7319 LCD Backlight Inverter Drive IC Features Description High-Efficiency Single-Stage Power Conversion The FAN7319 is a LCD backlight inverter drive IC that Wide Input Voltage Range: 10V to 24V controls N-N push-pull topology or N-N full-bridge topology using a proprietary phase-shift method. Backlight Lamp Ballast and Soft Dimming Minimal Required External Components The FAN7319 provides a low-cost solution and reduces Precision Voltage Reference Trimmed to 2% external components by integrating full-wave rectifiers for open-lamp protection and regulation (patent pending). ZVS or ZCS Push-Pull & Full-Bridge Topology The operating voltage range is wide, so an external PWM Control at Fixed Frequency regulator isnt necessary to supply voltage to the IC. ZCS Control by Sensing Resonant Tank Current The FAN7319 provides various protections, such as External Pulse Burst Dimming Function - Positive open-lamp regulation, open-lamp protection, short-lamp Analog Dimming Function - Positive protection, CMP-high protection, and FB-high protection, Programmable Striking Frequency to increase the system reliability. The FAN7319 provides Open-Lamp Protection burst dimming function and analog dimming. Open-Lamp Regulation The FAN7319 is available in a 20-Lead Small Outline Short-Lamp Protection Integrated Circuit (SIOC) package. CMP-High Protection Dynamic Contrast Ratio Mode Thermal Shutdown 20-Pin SOP Applications LCD TV LCD Monitor Ordering Information Part Number Operating Temperature Package Packing Method FAN7319M -25 to +85C Rail 20-Lead, SOIC, JEDEC MS-013, .300 Inch, Wide Body FAN7319MX -25 to +85C Tape & Reel 2010 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7319 1.0.1 FAN7319 LCD Backlight Inverter Drive IC FAN7319 Typical Full-Bridge Application Circuit (LCD Backlight Inverter) Application Input Voltage Range Number of Lamps LCD TV (LIPS Type) 1310% CCFL/EEFL IP OLR PFC OUT(380Vdc) F1 FUSE C11 22p C51 C52 100uF 100uF 0 450V 450V CN3 R16 30k CN4 CN CCFL CN CCFL L1 = 700uH / L2 = 400uH R15 10k K=0.98 Pulse FDPF7N50F D8 Transformer BAV70 R101 R102 C3 C6 SOT-23 M1 27pF/6KV 27pF/6KV T1 68R 1.8R SOT-23 R104 TO-220F BAV70 Q101 R103 R109 Q2N2222A C101 ZD101 1k SOT-23 R105 C102 12k OPEN open C7 R12 R14 C8 OUTD 12k 1n SOD-123 C5 600V 15n 10k 10k 15n 22R T3 D101 680nF R108 R201 R202 M2 OUTC 0 22R 68R 1.8R SOT-23 R204 R203 TO-220F R33 BAV70 Q201 C201 ZD201 SENSE Q2N2222A 12k OPEN open FDPF7N50F 1k R205 C202 SOT-23 SOD-123 open 12k 1n R20 R21 R34 33 OPEN 30k 1W 1W D10 BAV70 D201 SOT-23 R19 0 0 OLP Pulse 15k Transformer R22 R301 R302 R27 R28 30k M3 33 OPEN T2 1W 1W 68R 1.8R SOT-23 R304 R303 TO-220F BAV70 Q301 R107 Q2N2222A C301 ZD301 FDPF7N50F 1k 0 R305 C302 SOT-23 12k OPEN open OUTB SOD-123 12k 1n 22R D301 R106 R401 R402 OUTA M4 FDPF7N50F 22R 68R 1.8R SOT-23 R404 R403 TO-220F BAV70 Q401 C401 ZD401 Q2N2222A 12k OPEN open 1k R405 C402 SOT-23 SOD-123 12k 1n D401 R56 ENA 22R C27 100n R58 C28 0 33k 1n REF 20-SOIC IC2 R54 R57 VOLP ENA 68k 100k 2.2u 0 REF OVPR VIN C24 R55 C26 R59 R39 VIN(10~24V) 47k 1n OPEN BDIM MODE 1k R38 R60 10k CN2 ADIM OLP OLP 0R 10k R53 1 2 BDIM(External only) 4.7n 3 R40 C16 R44 C25 OLR CMP OLR 0 4 open C15 5 1n 10k 100n R52 1u VIN ADIM(Positive) TIMER VIN 12505WR-5 C29 4.7R C1 0 C23 OUTA RT OUTA 47uF 2.2u 0 25V RT1 OUTB OUTB R30 0 82k R31 51k SENSE OUTC SENSE OUTC OUTD GND OUTD R35 15k 0 FAN7319 REF Figure 47. Typical Full-Bridge Application Circuit 2010 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7319 1.0.1 20 1 1 2 2 1 1 2 2