FAN7319 LCD Backlight Inverter Drive IC

Transcription

1 FAN739 LCD Backlight Inverter Drive IC Features High-Efficiency Single-Stage Power Conversion Wide Input Voltage Range: V to 4V Backlight Lamp Ballast and Soft Dimming Minimal Required External Components Precision Voltage Reference Trimmed to % ZVS or ZCS Push-Pull & Full-Bridge Topology PWM Control at Fixed Frequency ZCS Control by Sensing Resonant Tank Current External Pulse Burst Dimming Function - Positive Analog Dimming Function - Positive Programmable Striking Frequency Open-Lamp Protection Open-Lamp Regulation Short-Lamp Protection CMP-High Protection Dynamic Contrast Ratio Mode Thermal Shutdown -Pin SOP Description May The FAN739 is a LCD backlight inverter drive IC that controls N-N push-pull topology or N-N full-bridge topology using a proprietary phase-shift method. The FAN739 provides a low-cost solution and reduces external components by integrating full-wave rectifiers for -lamp protection and regulation (patent pending). The operating voltage range is wide, so an external regulator isn t necessary to supply voltage to the IC. The FAN739 provides various protections, such as -lamp regulation, -lamp protection, short-lamp protection, CMP-high protection, and FB-high protection, to increase the system reliability. The FAN739 provides burst dimming function and analog dimming. The FAN739 is available in a -Lead Small Outline Integrated Circuit (SIOC) package. FAN739 LCD Backlight Inverter Drive IC Applications LCD TV LCD Monitor Ordering Information Part Number Operating Temperature Package Packing Method FAN739M -5 to +85 C -Lead, SOIC, JEDEC Rail FAN739MX -5 to +85 C MS-3,.3 Inch, Wide Body Tape & Reel Fairchild Semiconductor Corporation FAN739..

2 Typical Full-Bridge Application Circuit (LCD Backlight Inverter) Application Input Voltage Range Number of Lamps LCD TV (LIPS Type) 3±% CCFL/EEFL IP R9 R R8 R R7 R R6 R L = 7uH / L = 4uH K=.98 Pulse Transformer T Pulse Transformer T D D D3 BAV7 BAV7 BAV7 BAV7 PFC_OUT(38Vdc) R4 k R5 R4 k R34 k R44 k R5 R35 R45 R C R R4 C5 uf 45V F FUSE C5 uf 45V.8R R3 Q QNA C R3 C3 C4 R.8R Q QNA R R3.8R R Q3 QNA R4.8R Q4 QNA R3 R43 C C C3 C4 ZD SOD-3 ZD SOD-3 ZD3 SOD-3 ZD4 SOD-3 FDPF7N5F M TO-F M TO-F FDPF7N5F C5 68nF M3 TO-F 6V FDPF7N5F M4 FDPF7N5F TO-F T3 CN3 R W R7 W R W R8 W C3 7pF/6KV C7 5n\ R k R C R6 R5 k D BAV7 R9 5k p 3k D8 BAV7 R34 3k R 3k CN4 R4 k C6 7pF/6KV C8 5n FAN739 LCD Backlight Inverter Drive IC D4 R56 R C7 R58 k C8 IC -SOIC CN WR-5 (~4V) BDIM(External only) ADIM(Positive) R39 k R4.u C4 k R53 C6 R57 k R38 k R44 k R3 5k C5 4.7n u R3 8k C5 C9 V BDIM ADIM CMP TIMER RT RT FAN739 OVPR MODE R54 68k R55 47k C6 R59 R6 R C3.u C 47uF 5V R5 4.7R GND R35 5k FAN739 Figure 47. Typical Full-Bridge Application Circuit Fairchild Semiconductor Corporation FAN739..

3 Typical Half-Bridge Application Circuit (LCD Backlight Inverter) Application Input Voltage Range Number of Lamps LCD TV (LIPS Type) 3±% CCFL/EEFL IP R36 R Pulse Transformer T BAV7 PFC_OUT(38Vdc) R34 k R35 R3 C3 C5 8uF 45V R3.8R Q3 QNA C5 8uF 45V R F FUSE C3 ZD3 5V SOD-3 C5 68nF 6V FDPF7N5F M3 TO-F T3 CN3 R W R7 W C3 5pF/6KV C7 5n\ R W R8 W R k R C R6 R5 k D8 BAV7 D BAV7 R9 5k p 3k CN4 R4 k R34 3k R 3k C6 5pF/6KV C8 5n FAN739 LCD Backlight Inverter Drive IC R37 R D3 BAV7 R44 k R45 R4 C4 R4.8R Q4 QNA R43 C4 ZD4 5V SOD-3 M4 FDPF7N5F TO-F D4 R56 R C7 R58 k C8 IC -SOIC CN WR-5 (~4V) BDIM(External only) ADIM(Positive).u C4 R53 k C6 R57 k R38 k R44 k C5 R3 k u C5 C9 R3 V BDIM ADIM CMP TIMER RT RT FAN739 OVPR MODE R54 68k R55 47k C6 R59 R R6 C3.u C 47uF 5V R5 4.7R GND R35 5k FAN739 Figure 48. Typical Half-Bridge Application Circuit Fairchild Semiconductor Corporation FAN739..

4 Physical Dimensions.65. B PIN ONE INDICATOR M C B A A FAN739 LCD Backlight Inverter Drive IC LAND PATTERN RECOMMENDATION.65 MAX SEE DETAIL A C X C SEATING PLANE NOTES: UNLESS OTHERWISE SPECIFIED (R.) (R.) (.4) GAGE PLANE SEATING PLANE DETAIL A SCALE: :.5 A) THIS PACKAGE CONFORMS TO JEDEC MS-3, VARIATION AC, ISSUE E B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS DO NOT INCLUDE MOLD FLASH OR BURRS. D) CONFORMS TO ASME Y4.5M-994 E) LANDPATTERN STANDARD: SOIC7P3X65-L F) DRAWING FILME: MKT-MBREV3 Figure 49. -Pin, 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: Fairchild Semiconductor Corporation FAN739..

5 Fairchild Semiconductor Corporation FAN FAN739 LCD Backlight Inverter Drive IC

6 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Fairchild Semiconductor: FAN739M FAN739MX