LX1699 High Performance CCFL Controller ® TM P RODUCTION D ATASHEET DESCRIPTION KEY FEATURES The controller includes a built-in reference voltage regulator so it can be operated directly from the battery without the need of an external 5V supply from the system. The LX1699 power stage is full bridge driven and includes DC coupled high side drivers on chip for the external P-channel high side and N-channel low side power MOSFETs. Also for fixed input supply applications the IC may be used as a Direct Drive CCFL controller connected directly to the high voltage transformer primary via a single pair of N-FET drivers. • Microsemi Patented Direct Drive TM or Full Bridge Configurable • 6.5 to 24 Volts Wide Input Voltage Range • Supports Intel TM DPST for System PWM Input • Compatible with Microsemi’s New SMBus CCFL Controllers • Fully Programmable Open Lamp and Load Fault Time Outs • Detects and Shuts Down for all Common Lamp Faults • On Chip Full Wave Rectifiers for Lamp Voltage and Current • Uses Industry Standard High Voltage Transformers Reverse analog dimming control is provided to set the lamp current from maximum lamp current to max -1.8mArms range. Digital Dimming duty cycle is controlled by providing either a DC voltage or a PWM signal to the BRITE_D pin. Burst frequency can be controlled by either by the on chip precision oscillator or directly by a logic signal at BRITE_D. WWW . Microsemi .C OM The LX1699 is a high performance CCFL The LX1699 has improved lamp current (Cold Cathode Fluorescent Lamp) accuracy, fully programmable lamp controller optimized for wide input voltage frequency and burst dimming frequency range display backlighting applications. oscillators, and Microsemi’s patented fullproof lamp strike circuitry. The LX1699 brightness control architecture supports Intel’s DPST Programmable open lamp strike timeout (Display Power Saving Technology) that and open lamp, short lamp, and over adjusts the brightness as a function of voltage fault detection are fully video content. implemented. APPLICATIONS • Note Book LCD Displays • Transportable Computers • Web Tablet LCD displays The LX1699 is available in the 20 pin 4 x 4mm QFN surface mount packages. Operating temperature ranges is -20’C ~ 70’C. IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com Patents Pending PRODUCT HIGHLIGHT VBAT 1.5A 24V ISNS 1K R5 2 4.7nF C8 3 100K R14 4 NU C9 5 100nF C10 6 1.0uF C11 7 U1 LX1699CLQ F_OSC B_OSC ENABLE VIN_SNS EA_OUT AGND BRITE_A VDD 20 33nF C6 19 220pF C5 VCOMP VBAT VP5 -20 to 70 17 470nF C4 16 100nF C2 AM4542C U3A 2 BOL C3 470nF 15 3 5 6 AOL JST SM02 B-BHSS-1-TB(LF)(SN) T1 TMP SIT24220-0839 1uF VAS 1K 8 9 C_TO AOH I_SNS BOH V_SNS AOL PGND BOL 14 13 12 11 AOH 2 2 AM4542C U2A SM02 CN2 100nF C17 4 1 1 2 C16 15pF 3KV 5 3 CI-8.5 24:2200 VSNS ISNS C13 C14 10nF 4.7nF NU R12 340 Ohm BOH AOL BOL THERMAL DATA Plastic 4x4 mm QFN 20-pin θJA = 31 °C/W RoHS Compliant / Pb-free THERMAL RESISTANCE-JUNCTION TO AMBIENT LX1699CLQ Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1699CLQ-TR) Copyright © 2009 Rev. 1.0a, 2009-02-05 3 C15 PACKAGE ORDER INFO LQ 10K R13 C12 10 TA (°C) AM4542C U2B VBS 18 VDD BRITE_D 4 1 1 AOH 5 6 NU 1M R10 BOH 47K R2 7 8 NU 220pF C7 R11 AM4542C U3B 4 VDD R3 511K 1 76.8K C1 4.7uF 25V LX1699 VSNS R9 10K R8 10K R7 R6 VDD 1 2 3 4 5 6 7 R4 INV_PWR INV_PWR INV_PWM DISOFF# DAC_BRIG GND GND F1 7 8 JST SM07 B-SRSS-TB-G CN1 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 TM ® Thank you for your interest in Microsemi® Analog Mixed Signal products. The full data sheet for this device contains proprietary information. To obtain a copy, please contact your local Microsemi sales representative. The name of your local representative can be obtained at the following link http://www.microsemi.com/contact/contactfind.asp or Contact us directly by sending an email to: [email protected] Be sure to specify the data sheet you are requesting and include your company name and contact information and or vcard. We look forward to hearing from you. Copyright Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 WWW . Microsemi .C OM INFORMATION