Two-Step LED Current Controller


Information Two-Step LED Current Controller
Package DFN-6
More details For more information please contact support
Features 2-step integrated driver, Improved line regulation, Built in thermal foldback and VIN pin clamp
Pkg Code
Status Active
Suggested Upgrade
Steps 2
Max Voltage (V) 78
IOUT MAX (mA) 180
Power Line Regulation Y
Dimmable Y; Triac
Application downlight, high bay, specialty, architectural
Show more

The XR46073 is a two-step LED current controller for AC step driving with improved line regulation primarily for A19 LED bulb applications. It integrates two steps of current control to the LED strings and greatly improves the line regulation of the circuit by monitoring the line voltage and adjusting LED drive current proportionally.

The XR46073 can drive an external N-channel power MOSFET to regulate the current flowing through a high voltage (HV) LED string. It works as a constant current sink with linear type overvoltage protection (OVP), linear type over temperature protection (OTP) and line regulation compensation. It is suitable for applications with a rectified AC voltage source. The XR46073 is ideal for replacing incandescent light bulbs. The PCB design can be very compact to meet various shape requirements.

  • Two-current step control from a single device
  • Excellent system power regulation over AC line variation range
  • 6V to 78V chip supply voltage range
  • Over temperature protection
  • Overvoltage protection
  • 2mm x 2mm 6-lead DFN package


  • Single board LED lighting solution available
  • No electrolytic capacitor or MOV required
  • Scalable architecture allows optimization of performance vs. cost
  • Driver onboard and chip onboard design solution available which minimize process flow and assembly cost
  • High PF and Low THD performance
  • Flexible PCB layout options
  • TRIAC dimmable
  • All solid state components

  • LED Lighting Applications
    • Downlight
    • High bay
    • Specialty
    • Architectural

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets XR46073 Two-Step LED Current Controller with Line Regulation Compensation 1C August 2018 719.5 KB
Product Flyers Two-Step LED Current Controller Cost Effective LED Lighting Solution 00 November 2020 521.6 KB
Product Brochures Power Management Brochure October 2020 2.4 MB
Product Briefs XR46073 Product Brief November 2016 144.7 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XR46073IHBTR N Y Y Y Y L1 / 260ᵒC TDFN6 2x2

Click on the links above to download the Certificate of Non-Use of Hazardous Substances.

Additional Quality Documentation may be available, please Contact Support.

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Buy Now Order Samples
XR46073IHBTR TDFN6 2x2 -40 85 Active Order

Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.


Pkg Code Details Quantities Dimensions PDF
TDFN6 2x2
  • JEDEC Reference: MO-229
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 81ºC/W
  • Bulk Pack Style: Canister
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 180 x 8 x 4
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 2.00
  • Width: 2.00
  • Thickness: 0.8
  • Lead Pitch: 0.65

FAQs & Support

Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.

Submit a Technical Support Question As a New Question

The best way to determine this is to go to maxlinear.com and type the part into the search function. At or near the top of the results you should see something that looks like:

In this example, we looked for XRA1201. Click on part number header or on the link at the bottom of the result.  This brings you to the product page. For example:


Click on Parts & Purchasing, highlighted with the blue arrow above. The screen changes to:


Notice the status column and the “Show obsolete parts” link.  A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers, the legend still present:


Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:


And then Product Change Notifications:


Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:


If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.