MAX31840
Info : RECOMMENDED FOR NEW DESIGNS
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MAX31840

MR16 LED Driver with Integrated Control MOSFET and Deep Dimming

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Integrated Solution Enables Dimmable MR16 LED Lamps to Be Compatible with Electronic Transformers

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 2
1ku List Price Starting From $0.82
Features
  • 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
Additional Details
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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)
Part Models 2
1ku List Price Starting From $0.82

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX31840ATA+
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  • HTML
MAX31840ATA+T
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX31840EVKIT

Evaluation Kit for the MAX31840

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MAX31840EVKIT

Evaluation Kit for the MAX31840

Evaluation Kit for the MAX31840

Features and Benefits

  • Input Voltage Ranges
    • 9V AC to 13.2V AC from AC Source
    • 6.5V to 13.8V DC or Output of Electronic Transformers
  • Drives Up to 35V LED Forward Voltage
  • 36V Overvoltage Protection
  • Up to 13W Output Power
  • Demonstrates IC Power-Factor Correction
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX31840 evaluation kit (EV kit) demonstrates the MAX31840 LED driver IC used for dimmable 12V MR16 as well as AR111 and other 12V lighting applications. The EV kit is configured in a boost topology that provides an output power of up to 13W for up to 35V LED forward voltage. The IC is designed for the boost architecture to address 35W and 50W MR16 LED replacement bulbs. The EV kit’s typical efficiency 90% at 12V AC and features a power-factor correction of 0.9 (typ).

The EV kit is a fully assembled and tested surface-mount PCB designed and optimized to accommodate an MR16 application form factor. The EV kit is dimmable with most electronic transformers and trailing-edge dimmer combinations. The EV kit includes bleeder and constant power circuits for enhanced electronic transformer performance.

Applications

  • 12V MR16 GU5.3 LED Bulb
  • Other 12V LED bulbs (MR11, AR111, 12V Track Lighting)

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