Two-Step LED Current Controller
Data Sheets OBS (Obsolete)


Steps 2
Max Voltage (V) 78
IOUT MAX (mA) 180
Power Line Regulation Y
Dimmable Y; Triac
Application downlight, high bay, specialty, architectural
Package DFN-6
Features 2-step integrated driver, Improved line regulation, Built in thermal foldback and VIN pin clamp
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
Register for a myMxL account or Login to myMxL to view all Technical Documentation & Design Tools.

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 Suggested Replacement PDN
XR46073IHBTR TDFN6 2x2 -40 85 OBS
Show obsolete parts
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


Distribution Date Description File
08/30/2022 Product Discontinuation Notice

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

Visit the product page for the part you are interested in.  The part's status is listed in the Parts & Purchasing section.  You can also view Product Lifecycle and Obsolescence Information including PDNs (Product Discontinuation Notifications).
To visit a product page, type the part into the search window on the top of the MaxLinear website.
In this example, we searched for XRA1201.  Visit the product page by clicking the part number or visit the orderable parts list by clicking "Orderable Parts". 



The Parts & Purchasing section of the product page shows the Status of all orderable part numbers for that product.  Click Show obsolete parts, to see all EOL or OBS products.