FAN7314_07

FAN7314 — LCD Backlight Inverter Drive IC October 2007 FAN7314 LCD Backlight Inverter Drive IC Features High-Efficiency Single-Stage Power Conversion Wide Input Voltage Range: 5V to 25.5V Back Light Lamp Ballast and Soft Dimming Reduces Number of Required External Components Precision Voltage Reference Trimmed to 2% ZVS Half-Bridge Topology Soft Start PWM Control at Fixed Frequency Analog and Burst Dimming Function Programmable Striking Frequency Open-Lamp Protection Open-Lamp Regulation 20-Pin SOIC Description The FAN7314 provides all the control functions for a series parallel resonant converter as well as a pulse width modulation (PWM) controller to develop a supply voltage. Typical operating frequency range is between 30kHz and 250kHz, depending on the CCFL and the transformer's characteristics. 20-SOIC Ordering Information Part Number FAN7314M FAN7314MX Package 20-SOIC 20-SOIC Operating Temperature Range -25°C ~ 85°C Packing Method Rail Tape & Reel All packages are lead free per JEDEC J-SDD-020B standard. Protected by U.S. Patent: 5,652,479. © 2006 Fairchild Semiconductor Corporation FAN7314 Rev. 1.0.4 www.fairchildsemi.com FAN7314 — LCD Backlight Inverter Drive IC Typical Application Circuit Application 19 inch LCD Monitor Lamps 4 Input Voltage 13V 1. Schematic F1 FUSE C22 220μ F 25V C26 R6 OLP OLR RT1 OUTB OUTA C6 S_S GND C2 1μ F REF ADIM R7 0Ω BDIM CT RT BCT R5 C4 27kΩ 4.7nF VIN PGND OUTC OUTD C5 220pF GN DN DP C25 1μF C27 1μ F CN5 1 2 3 4 5 6 7 8 9 10 12505WR-10 0 13V IC1 FAN7314 0.1μF 0 82kΩ M1 0 DN 0 RT 0 SN OUTB GN DN DP ON/OFF R24 10kΩ C28 10nF C1 ENA OUTA 1μF C7 10μF 0 0 0 0.22μF 0 0 R25 10kΩ SP LTM190EX TX1 1 HOT CN1 CCFL COLD 2 1 HOT CN2 CCFL COLD GP DP 0 DIM(0~3.3V) REF R2 56kΩ 0 J1 0Ω FDS8958A M2 C8 10μF 0 SN DN 0 0 0 0 R27 10kΩ SP C10 15pF C11 15pF OLP1 2 R4 22kΩ C21 10nF R3 18kΩ OLP2 EA_IN EA_OUT C3 4.7nF R8 GP DP 0 0 FDS8958A OLR D4 BAV70 RT R15 R26 1kΩ C14 10nF R13 1kΩ C30 10nF D6 BAV99 R17 1kΩ D7 BAV99 R16 1kΩ FB 100kΩ R9 9.1kΩ 10kΩ 0 0 0 FB 0 0 0 0 0 OLR REF R1 330kΩ R14 100kΩ 0 TX2 1 HOT CN3 CCFL COLD OLP1 R22 10kΩ R23 10kΩ OLP2 1 HOT CN4 CCFL COLD 2 OLP 0 D11 BAW56 0 C9 1μF C12 15pF C13 15pF 2 Q1 KST2222 D1 BAW56 OLP3 OLP4 OLP3 R20 10kΩ D10 BAW56 C18 2.2nF C17 2.2nF R21 10kΩ OLP4 C19 2.2nF C20 2.2nF 0 0 OLR D3 BAV70 R12 1kΩ C29 10nF R11 1kΩ C15 10nF D8 BAV99 R18 1kΩ D9 BAV99 R19 1kΩ 0 0 0 0 0 0 0 0 0 0 0 FB FAN7314 Rev. 02 2. Transformer Schematic Diagram Supported by Namyang electronics (http://www.namyangelec.co.kr) FAN7314 Rev. 02 3. Core & Bobbin Core: EFD2124 Material: PL7 Bobbin: EFE2124 © 2006 Fairchild Semiconductor Corporation FAN7314 Rev. 1.0.4 10 www.fairchildsemi.com FAN7314 — LCD Backlight Inverter Drive IC © 2006 Fairchild Semiconductor Corporation FAN7314 Rev. 1.0.4 14 www.fairchildsemi.com