MP3393EF-LF Monolithic Power Systems

MP3393 8-String Step-Up White LED Driver with External Transistor The Future of Analog IC Technology DESCRIPTION FEATURES 9V-to-32V Input Voltage Range The MP3393 is a step-up controller with 8 Drives 8 Channels of LED strings current channel sources designed to power Internal Constant-Current Control WLED backlights for large LCD panels. Maximum Channel Current Over 350mA The MP3393 uses current-mode fixed-frequency 1.2% Current Matching Accuracy Between architecture. It drives an external MOSFET to Strings boost the output voltage. The switching frequency Programmable Switching Frequency is programmable by an external setting resistor. Analog Dimming and External PWM The MP3393 integrates a constant-current control Dimming circuit to regulate the current in each LED string Open and Short LED Protection to the value set by an external current feedback Programmable Over-Voltage Protection resistor. Current matching can achieve 1.2% Fault Output Flag regulation accuracy between strings. Its low Thermal Shutdown 202mV regulation voltage reduces power loss Extendable LED Channels that Share One and improves efficiency. Power Stage Set The MP3393 includes protections including TSSOP28EP and SOIC28 Packages under-voltage lockout, LED open/short protection, APPLICATIONS and thermal shutdown. The fault flag pin indicates the statuses of all fault signals. Flat Panel Video Displays LCD TVs and Monitors The MP3393 can be daisy-chained to expand the number of LED channels. It is available in All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. TSSOP28EP and SOIC28 packages. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. MP3393 Rev. 1.05 www.MonolithicPower.com 1 3/26/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved. MP33938-STRING WHITE LED DRIVER WITH STEP-UP CONTROLLER TYPICAL APPLICATION D1 8 WLED Strings L1 VIN CIN COUT R1 28 1 VFAULT VIN R2 RFF CVCC M1 2 27 GATE VCC 23 26 FF ISENSE FF RCOMP CCOMP 25 3 GND COMP RSENSE ROSC 24 4 OVP OSC 8 5 CTL1 EN Enable 7 6 FB1 RS1 DIM DIM MP3393 10 22 CTL2 FB8 21 9 RS2 CTL8 FB2 20 12 FB7 CTL3 19 11 CTL7 FB3 RS3 18 14 FB6 CTL4 17 13 CTL6 RS4 FB4 16 15 CTL5 FB5 RS2 RS3 RS4 MP3393 Rev. 1.05 www.MonolithicPower.com 2 3/26/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved.