MAX31840
MAX31840
RECOMMENDED FOR NEW DESIGNSMR16 LED Driver with Integrated Control MOSFET and Deep Dimming
Integrated Solution Enables Dimmable MR16 LED Lamps to Be Compatible with Electronic Transformers
- Part Models
- 2
- 1ku List Price
- Starting From $1.04
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Overview
- High Integration Saves PCB Space and BOM Costs
- 36V Boost N-Channel DMOS FET
- Bleeder FET Control
- Deep Dimming Control
- Constant Brightness Control
- Internal Compensation
- LED Overvoltage Protection
- Overcurrent and Overtemperature Protection
- High-Performance for New LED Dimming Requirements
- Meets California Title 24 Part 6 JA8
- Flickering < 30%
- > 0.9 Power Factor
- Dimming to <1% Brightness, Depending on LEDs
- Tight LED Current Regulation of 2% Typical
The MAX31840 is an LED driver IC for dimmable 12V MR16, as well as AR111 and other 12V lighting applications. This next-generation MR16 LED driver minimizes BOM count, cost, and board space by integrating a number of value-added functions: deep dimming, bleeder control, constant brightness control, and a boost FET; while significantly improving electronic transformer compatibility with standard trailing-edge dimmers. The MAX31840 is designed for the boost architecture to address 35W and higher-wattage MR16 LED replacement bulbs.
The MAX31840 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 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 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 -40°C to +125°C operating temperature range.
Applications
- 12V MR16 GU5.3 LED Bulb
- Other 12V LED bulbs (MR11, AR111, 12V Track Lighting)
Documentation
Data Sheet 1
Evaluation Design File 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX31840ATA+ | LFCSP | ||
| MAX31840ATA+T | LFCSP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 2, 2025 - 2505 PIN/ERRATA |
||
| MAX31840ATA+ | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Evaluation Kit for the MAX31840
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