FAN7316 LCD Backlight Inverter Drive IC Features Description The FAN7316 is a LCD backlight inverter drive IC that controls N-N half-bridge topology. The FAN7316 can also drive push-pull topology. High-Efficiency Single-Stage Power Conversion Wide Input Voltage Range: 4.5V to 24V Backlight Lamp Ballast and Soft Dimming Reduces Required External Components Precision Voltage Reference Trimmed to 2% N-N Half-Bridge Topology PWM Control at Fixed Frequency Analog and Burst Dimming Function Selectable Burst Dimming Polarity by ADIM Voltage Striking Frequency Depending on Normal Frequency Open-Lamp Protection Open-Lamp Regulation Short-Circuit Protection 20-Pin SOIC The FAN7316 provides a low-cost solution by integrating the external open-lamp protection circuit. The operating voltage of the FAN7316 is wide, so the FAN7316 doesn’t need an external regulator to supply the voltage to the IC. The FAN7316 has the internal bootstrap driver, so the external fast recovery diode can be avoided. The FAN7316 provides various protections, such as open-lamp regulation, arc protection, open-lamp protection, short-circuit protection, and CMP-high protection to increase the system reliability. The FAN7316 provides analog dimming, burst dimming, and burst dimming polarity selection functions. The FAN7316 is available in a 20-SOIC package. Applications LCD TV LCD Monitor Ordering Information Part Number Package Operating Temperature Packing Method FAN7316M 20-SOIC -25 to +85°C RAIL FAN7316MX 20-SOIC -25 to +85°C TAPE & REEL All packages are lead free per JEDEC: J-STD-020B standard. Protected under U.S. patent number 5,652,479. © 2007 Fairchild Semiconductor Corporation FAN7316 • 1.0.1 www.fairchildsemi.com FAN7316 — LCD Backlight Inverter Drive IC January 2008 Application Device Input Voltage Range Number of lamps 19-Inch LCD Monitor FAN7316 14.5±10% 4 1. Features High-Efficiency Single-Stage Power Conversion N-N Half-Bridge Topology Reduces Required External Components Enhanced System Reliability through Protection Functions F1 C1 330u FUSE C2 1u 0 OLP3 OLP4 OLR 0 0 0 0 C5 10n R2 R3 100k 100k R1 30k VB VIN VS OUTH SCP RT BCT OLR IC1 15V OLP4 OLP3 1 2 3 4 5 6 7 8 9 10 D2 BAV70 SN1 DN1 GN1 DN1 10R FAN7316 0 VREF OUTL GND ENA ADIM BDIM FB CMP OLP2 OLP1 10R C10 2.7n 0 R5 10k 1 2 2 0 0 D3 BAV70 SN2 OLP3 R6 680 35001WR-02A DN2 TX2 GN2 C12 33n OLP1 OLP2 0 REF R10 12k R13 100k R12 75k C23 N.C. 0 C7 10u CN3 35001WR-02A 10k 0 R27 10k C15 3p 0 R29 0 D4 BAV70 OLR R14 10k 0 R18 100k 0 C16 3p C18 2.7n 0 R15 10k 2 2 1 2 2 0 OLP1 C19 2.7n 0 C21 4.7n 0 0 1 OLP2 C13 1u R11 9.1k C14 0.1u R20 R23 N.C. 1 DN2 AOP800 0 R22 0R CN4 0 1 R25 N.C. R7 680 0 0 R8 R9 100k 100k 2 C11 2.7n C4 10u R30 ON/OFF R4 10k 0 R31 DIM(0~3.3V) 12505WR-10 1 1 2 OLP4 M1 CN5 C9 3p C8 3p C6 1u R24 0R 1 CN1 35001WR-02A 0 0 CN2 35001WR-02A LTM190EX TX1 C3 1u D5 BAV70 R17 680 0 0 R16 680 0 R28 0 C20 1n C17 10n 0 0 R19 10k 0 20k R21 20k Figure 47. Typical Application Circuit 2. Transformer Schematic Diagram Figure 48. Transformer Schematic Diagram 3. Core & Bobbin Core: EFD2126 Material: PL7 Bobbin: EFD2126 © 2007 Fairchild Semiconductor Corporation FAN7316 • 1.0.1 www.fairchildsemi.com 18 FAN7316 — LCD Backlight Inverter Drive IC Typical Application Circuit (LCD Backlight Inverter) FAN7316 — LCD Backlight Inverter Drive IC © 2007 Fairchild Semiconductor Corporation FAN7316 • 1.0.1 www.fairchildsemi.com 21