MAX31840ATA+

The MAX31840ATA+ from Maxim Integrated Products is a MR16 LED driver with integrated control MOSFET and deep dimming in 8 pin TDFN-EP package. It is an LED driver IC for dimmable 12V MR16 as well as AR111 and other 12V lighting applications. It minimizes BOM count, cost and board space by integrating a number of value added functions such as deep dimming, bleeder control, constant brightness control and boost FET while significantly improving electronic transformer compatibility with standard trailing edge dimmers. It is a high end MR16 LED driver that incorporates a proprietary circuit that enables deep dimming down to 1%, an improvement over others that only dim down to 10% or 20%. An integrated bleeder and constant brightness controller enables 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 board space, simplifying design and saving cost.

• High integration saves PCB space and BOM costs
• 36V boost N-channel DMOS FET, bleeder FET control, flickering < 30%, > 0.9 power factor
• Deep dimming control, constant brightness control, internal compensation
• LED overvoltage protection, overcurrent and overtemperature protection
• High performance for new LED dimming requirements
• 700KHz switching frequency, meets California title 24 part 6 JA8
• Designed for boost architecture to address 35W and higher wattage MR16 LED replacement bulbs
• Tight LED current regulation of 2% typical and dimming to less than 1% brightness depending on LEDs
• 6.5V to 26V operating voltage range, 1mA IN supply current (when MOSFET fully on, VCS = 0)
• Operating temperature range from -40°C to +125°C