Active Load Current Regulator for Phase-Cut Dimmable AC Direct Drive LED Lamp


Information Active Load Current Regulator for Phase-Cut Dimmable AC Direct Drive LED Lamp
Package SOT23-3
More details For more information please contact support
Features For use in TRIAC dimmable applications
Pkg Code
Status Active
Suggested Upgrade
Steps 1
Max Voltage (V) 80
IOUT MAX (mA) 60
Power Line Regulation
Dimmable Y; Improved Triac
Application downlight, high bay, specialty, architectural
Show more

The XR46010 is an active load current regulator for phase-cut dimmable AC direct drive LED lamp systems. The active load circuit can provide the holding current for the TRIAC and also the charging current path of the R/C circuit in a dimmer. It can help to stabilize the TRIAC operation and increase the dimming range of the lamp system.

The XR46010 is configured to work in parallel with an LED string. It conducts the current when the LED string is in the “off” state, and stops conducting the current when the LED string is in the “on” state.

The active load circuit can be placed on the same board with the LED string or a separate board in front of the LED board. The design is very flexible to meet various shape requirements. It is especially suitable for LED light bulbs and tubes.

  • 3V to 80V input operation range
  • 250mV low current sense voltage
  • Linear over temperature protection

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

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets XR46010 Active Load Current Regulator for Phase-Cut Dimmable AC Direct Drive LED Lamp 1C July 2018 478.6 KB
Product Brochures Power Management Brochure October 2020 2.4 MB
Product Briefs XR46010 Product Brief October 2016 139.5 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XR46010ISBTR N Y Y Y Y L1 / 260ᵒC TSOT3

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 Status Buy Now Order Samples
XR46010ISBTR TSOT3 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
  • JEDEC Reference:
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic:
  • ThetaJA: 267ºC/W
  • Bulk Pack Style:
  • 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: 1 lead near sprocket hole
  • Dimensions: mm
  • Length: 2.92
  • Width: 1.65
  • Thickness: 0.9
  • Lead Pitch: 1.9


Distribution Date Description File
07/11/2017 Product Discontinuation Notification
01/27/2017 Update of device and mask IDs due to IML to Exar technology transfer.
11/15/2016 Standard reel quantity will change from 2500 pieces to 3000 pieces.

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.