MP4012 High-Brightness, High-Current Accuracy WLED Controller The Future of Analog IC Technology DESCRIPTION FEATURES The MP4012 is a current mode controller Constant-current WLED Controller designed for driving the high brightness Light 8V~55V Input Voltage Emitting Diodes (LEDs) from extremely wide Constant Frequency Mode Or Constant Off input voltage 8V~55V. It can be used in Boost, Time Mode Buck, Buck-boost and SEPIC topologies. Programmable Switching Frequency or Off- Time The MP4012 drives external MOSFET with Leading Edge Blanking for Current Sense fixed frequency/constant off-time architecture to High Frequency PWM Dimming and Analog regulate the LED current, which is measured Dimming through an external current sense resistor. Its Output-to-Input Disconnect in Shutdown feedback voltage can be adjusted by the Mode external DC bias voltage. Synchronization Function The MP4012 can work in constant frequency Programmable Over Voltage Protection operation mode or constant off time mode. It Open Load Hiccup Mode Protection features programmable slop compensation that Short Load Hiccup Mode Protection can optimize the control loop regulation and Programmable Current Limit avoid sub harmonic oscillation. UVLO, Thermal Shutdown The MP4012 implements high frequency PWM Soft Start Dimming with external disconnect MOSFET. It Available in 16-pin SOIC package achieves analog dimming by adjusting the feedback voltage. APPLICATIONS The MP4012 has synchronizing function, which LCD Backlighting Applications makes multiple ICs synchronized to each other DC/DC LED Controller Applications by connecting SYNC pins together. General Illumination Industrial Lighting The MP4012 includes under-voltage lockout, Automotive/ Decorative LED Lighting over voltage protection, open and short hiccup All MPS parts are lead-free and adhere to the RoHS directive. For MPS green mode protection, overload protection and status, please visit MPS website under Quality Assurance. MPS and The thermal protection to prevent damage in the Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. case of fault condition. The MP4012 is available in a 16-pin SOIC package. MP4012 Rev. 1.12 www.MonolithicPower.com 1 10/12/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved. MP4012 HIGH-VOLTAGE, HIGH-CURRENT ACCURACY WLED CONTROLLER TYPICAL APPLICATION L1 D1 V IN C IN R OVP1 C OUT M1 R 1 3 OVP2 VIN GATE C DD R SC 2 5 VDD CS R CS 4 13 GND PWM PWM DIM 12 8 SYNC SYNC OVP C COMP 14 11 M2 COMP FAULT C REF 10 16 REF FB R FB 15 6 ISET SL R R SET1 SET2 R SL 9 7 CL RT R CL1 R CL2 R T MP4012 Rev. 1.12 www.MonolithicPower.com 2 10/12/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved.