FAN7310 LCD Backlight Inverter Drive Integrated Circuit Features Description High-Efficiency, Single-Stage Power Conversion The FAN7310 provides all the control functions for a series parallel resonant converter and contains 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. The FAN7310 has a patent-pending on phase-shift control. Wide Input Voltage Range: 5V to 24V Backlight Lamp Ballast and Soft Dimming Reduce External Components Precision Voltage Reference Trimmed to 2% ZVS full-bridge topology Soft-Start Feature PWM Control at Fixed Frequency Analog and Burst Dimming Function Synchronizable Switching Frequency with External Signal 20-SSOP Open-Lamp Protection Open-Lamp Regulation 20-Pin SSOP Applications LCD TV LCD Monitor Ordering Information Part Number Package Pb-Free FAN7310G 20-SSOP Yes FAN7310GX 20-SSOP Yes © 2005 Fairchild Semiconductor Corporation FAN7310 Rev. 1.0.3 Operating Temperature Range -25°C ~ 85°C Packing Method Rail Tape & Reel www.fairchildsemi.com FAN7310 — LCD Backlight Inverter Drive Integrated Circuit May 2007 VCC IC1 FAN7310 C25 100µF OLP 0 OLR R24 10kΩ ENA C28 10nF 0 0 0 REF REF 0 C2 1µF(X7R) R2 R4 56kΩ 22kΩ DIM(0~3.3V) C1 1µF R3 20kΩ C21 10nF 0 R6 100kΩ RT1 OUTA S_S VIN GND PGND REF OUTC ADIM OUTD BDIM CT EA_IN RT EA_OUT BCT 0 OUTB OUTB ENA C3 4.7nF C27 1µF R25 10kΩ 0 0 C22 1µF 0 R26 10kΩ OUTA M1 FDS8958A 0 C6 1µF TX1 0 C7 10µF M2 FDS8958A OUTC OUTD 0 0 C5 220pF R5 27kΩ C4 4.7nF 0 OLP1 0 0 OLR R8 100kΩ FB R15 R9 2kΩ 8.2kΩ CCFL C10 15pF 0 FB D4 BAV99 C14 20nF 0 R16 1.5kΩ D6 BAV99 0 0 0 0 OLR R14 C16 100kΩ 2.2nF OLP1 OLP R1 330kΩ 0 R22 10kΩ 0 Q1 D11 KST2222 D1N4148 C19 2.2nF D1 0 D1N4148 C9 1µF FAN7310 Rev. 05 0 Figure 1. Application Circuit for CCFL Internal Block Diagram RT OUTA OSCILLATOR Output Driver max. 2V OUTB CT min. 0.5V Output Control Logic + + S_S SYNC PGND OUTC Output Driver OUTD EA_OUT 6μA Error Amp. S_S 1.4μA + ADIM + EA_IN - Solr UVLO Q Q CLR Voltage Reference & Internal Bias - 2V + OLR 2V 2.5VREF REF - + VIN 1.4V VIN + AGND ENA + Sburst BDIM 2.7V UVLO R - max. 2V min. 0.5V S Solr Sburst 85μA BCT SET - 105μA OLP + UVLO - UVLO 5V FAN7310 Rev.03 Figure 2. Functional Block Diagram © 2005 Fairchild Semiconductor Corporation FAN7310 Rev. 1.0.3 www.fairchildsemi.com 2 FAN7310 — LCD Backlight Inverter Drive Integrated Circuit Typical Application ® ACEx Build it Now¥ CorePLUS¥ CROSSVOLT¥ CTL™ Current Transfer Logic™ ® EcoSPARK FACT Quiet Series™ ® FACT ® FAST FastvCore¥ FPS¥ ® FRFET SM Global Power Resource Green FPS¥ Power-SPM¥ ® PowerTrench Programmable Active Droop¥ ® QFET QS¥ QT Optoelectronics¥ Quiet Series¥ RapidConfigure¥ SMART START¥ ® SPM STEALTH™ SuperFET¥ SuperSOT¥-3 SuperSOT¥-6 SuperSOT¥-8 Green FPS¥ e-Series¥ GTO¥ i-Lo¥ IntelliMAX¥ ISOPLANAR¥ MegaBuck™ MICROCOUPLER¥ MicroPak¥ Motion-SPM™ ® OPTOLOGIC ® OPTOPLANAR PDP-SPM™ ® Power220 ® Power247 ® POWEREDGE SyncFET™ ® The Power Franchise ™ TinyBoost¥ TinyBuck¥ ® TinyLogic TINYOPTO¥ TinyPower¥ TinyPWM¥ TinyWire¥ PSerDes¥ ® UHC UniFET¥ VCX¥ DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Definition Preliminary First Production This datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only. Rev. I28 © 2005 Fairchild Semiconductor Corporation FAN7310 Rev. 1.0.3 www.fairchildsemi.com 11 FAN7310— LCD Backlight Inverter Drive Integrated Circuit TRADEMARKS The following are registered and unregistered trademarks and service marks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks.