28-pin (PWP) package image

LM3431MH/NOPB ACTIVE

3-channel constant current LED driver with integrated boost controller

Pricing

Qty Price
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Additional package qty | Carrier options These products are exactly the same but come in a different carrier type

LM3431MHX/NOPB ACTIVE custom-reels CUSTOM Custom reel may be available
Package qty | Carrier 2,500 | LARGE T&R
Inventory
Qty | Price 1ku | +

Quality information

Rating Catalog
RoHS Yes
REACH Yes
Lead finish / Ball material SN
MSL rating / Peak reflow Level-1-260C-UNLIM
Quality, reliability
& packaging information

Information included:

  • RoHS
  • REACH
  • Device marking
  • Lead finish / Ball material
  • MSL rating / Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Additional manufacturing information

Information included:

  • Fab location
  • Assembly location
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Export classification

*For reference only

  • US ECCN: EAR99

Packaging information

Package | Pins HTSSOP (PWP) | 28
Operating temperature range (°C) -40 to 125
Package qty | Carrier 48 | TUBE

Features for the LM3431

  • LM3431Q/LM3431AQ are Automotive Grade Products that are AEC-Q100 Grade 1 Qualified (–40°C to 125°C operating junction temperature)
  • 3-Channel Programmable LED Current
  • High Accuracy Linear Current Regulation
  • Analog and Digital PWM Dimming Control
  • Up to 25kHz Dimming Frequency
  • >100:1 Contrast Ratio
  • Integrated Boost Controller
  • 5V-36V Input Voltage Range
  • Adjustable Switching Frequency up to 1MHz
  • LED Short and Open Protection
  • Selectable Fault Shutdown or Automatic Restart
  • Programmable Fault Delay
  • Programmable Cycle by Cycle Current Limit
  • Output Over Voltage Protection
  • No Audible Noise
  • Enable Pin
  • LED Over-Temperature Shutdown Input
  • Thermal Shutdown
  • TSSOP-28 Exposed Pad Package

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Description for the LM3431

The LM3431 is a 3-channel linear current controller combined with a boost switching controller ideal for driving LED backlight panels in space critical applications. The LM3431 drives 3 external NPN transistors or MOSFETs to deliver high accuracy constant current to 3 LED strings. Output current is adjustable to drive strings in excess of 200 mA. The LM3431 can be expanded to drive as many as 6 LED strings.

The boost controller drives an external NFET switch for step-up regulation from input voltages between 5V and 36V. The LM3431 features LED cathode feedback to minimize regulator headroom and optimize efficiency.

A DIM input pin controls LED brightness from analog or digital control signals. Dimming frequencies up to 25 kHz are possible with a contrast ratio of 100:1. Contrast ratios greater than 1000:1 are possible at lower dimming frequencies.

The LM3431 eliminates audible noise problems by maintaining constant output voltage regulation during LED dimming. Additional features include LED short and open protection, fault delay/error flag, cycle by cycle current limit, and thermal shutdown for both the IC and LED array. The enhanced LM3431A features reduced offset voltage for higher accuracy LED current.

Pricing

Qty Price
+

Additional package qty | Carrier options These products are exactly the same but come in a different carrier type

LM3431MHX/NOPB ACTIVE custom-reels CUSTOM Custom reel may be available
Package qty | Carrier 2,500 | LARGE T&R
Inventory
Qty | Price 1ku | +

Carrier options

You can choose different carrier options based on the quantity of parts, including full reel, custom reel, cut tape, tube or tray.

A custom reel is a continuous length of cut tape from one reel to maintain lot- and date-code traceability, built to the exact quantity requested. Following industry standards, a brass shim connects an 18-inch leader and trailer on both sides of the cut tape for direct feeding into automated assembly machines. TI includes a reeling fee for custom reel orders.

Cut tape is a length of tape cut from a reel. TI may fulfill orders using multiple strips of cut tapes or boxes to satisfy the quantity requested.

TI often ships tube or tray devices inside a box or in the tube or tray, depending on inventory availability. We pack all tapes, tubes or sample boxes according to internal electrostatic discharge and moisture-sensitivity-level protection requirements.

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Lot and date code selection may be available

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