EVALUATION KIT AVAILABLE MAX31840 MR16 LED Driver with Integrated Control MOSFET and Deep Dimming General Description Benefits and Features The MAX31840 is an LED driver IC for dimmable 12V High Integration Saves PCB Space and BOM Costs MR16, as well as AR111 and other 12V lighting applications. 36V Boost N-Channel DMOS FET This next-generation MR16 LED driver minimizes BOM Bleeder FET Control Deep Dimming Control count, cost, and board space by integrating a number of value-added functions: deep dimming, bleeder control, Constant Brightness Control Internal Compensation constant brightness control, and a boost FET while significantly improving electronic transformer compatibility LED Overvoltage Protection Overcurrent and Overtemperature Protection with standard trailing-edge dimmers. The MAX31840 is designed for the boost architecture to address 35W and High-Performance for New LED Dimming higher-wattage MR16 LED replacement bulbs. Requirements Meets California Title 24 Part 6 JA8 The MAX31840 is a high-end MR16 LED driver that Flickering < 30% incorporates a proprietary circuit that enables deep > 0.9 Power Factor dimming down to ~1% an improvement over others that Dimming to <1% Brightness, Depending on LEDs only dim down to 10% or 20%. An integrated bleeder and Tight LED Current Regulation of 2% Typical constant brightness controller enables the MAX31840 to shine, flicker-free, with a broad range of electronic transformers. An optimized compensation circuit and boost FET are integrated to further reduce BOM and Ordering Information appears at end of data sheet. board space, simplifying design and saving cost. The MAX31840 is available in an 8-pin, 3mm x 3mm TDFN enhanced power package and is rated over the -40C to +125C operating temperature range. Applications 12V MR16 GU5.3 LED Bulb Other 12V LED bulbs (MR11, AR111, 12V Track Lighting) 19-100100 Rev 0 6/17MAX31840 MR16 LED Driver with Integrated Control MOSFET and Deep Dimming Simplified Block Diagram INPUT D1 L1 12V/0.5A 100uH/1.2A LED7 IN LED6 UV OV 5.6V 26V BIAS 5V R6 LED5 R4 2ohm 1W 560ohm C3 DRAIN 22uF ACREC 35V DEEP LED4 DIMMING PWM NFET DCDC SOURC C1 E 0.22uF AVDET 25V LED3 MAX C5 1uF BRIGHTNESS 6.3V CSA LED2 CS 0.2V LED1 BGT 0.5V M1 BLEED NDS351AN MAX31840 R1 BSRC 0.2ohm GND (EP) R2 0.5ohm Maxim Integrated 2 www.maximintegrated.com