Current Controller with Dimming Function
Product Brief OBS (Obsolete)


Package TDFN-8, MSOP-8
Features Supports Dual Voltage range lighting engines and low power smart lighting
Steps 1
Max Voltage (V) 40
Power Line Regulation Y
Dimmable Y; Analog/PWM
Application downlight, high bay, specialty, architectural
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The XR46701 is a current controller which integrates a PWM dimming function which can be controlled by a 1V to 4V control signal. Current is regulated through an external N-channel power MOSFET which allows one to scale current and spread heat dissipation.
The XR46701 is generally configured to be the last step in an LED AC direct step drive solution which provides excellent Power Factor and THD without the need for bulk capacitance or inductors. The DC dimming control signal applied to the DIM pin is converted to a Pulse Width Modulation signal to adjust the LED brightness.
The XR46701 also includes thermal foldback and power line regulation to avoid excessive power loss and over heating which can significantly reduce the life of LEDs. The Over Voltage Protection (OVP) and Over Temperature Protection (OTP) provide a failsafe in the worst operating conditions. The OVP can also be used to enable unique dual range AC direct drive solutions.

  • 4V to 40V supply voltage range
  • 5V 1mA output
  • Power line regulation
  • 1V to 4V DC to PWM dimming control range
  • 400 to 2000Hz adjustable internal PWM
  • VIN supply clamp eliminates external Zener
  • Dual Mode over temperature protection
    • Thermal current foldback
    • Thermal shutdown
  • Over voltage protection enables dual range lighitng solutions
  • >600V Native Surge protection extends MOV life

  • AC direct drive LED
  • High bay lighting
  • Dual range light engines
  • Downlights
  • Smart lighting

Documentation & Design Tools

Type Title Version Date File Size
Product Briefs XR46701 Product Brief January 2018 195.2 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XR46701IRBTR N Y Y Y Y L1 / 260ᵒC MSOP8
XR46701IHBTR N Y Y Y Y L1 / 260ᵒC TDFN8 3x3

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
XR46701IHBTR TDFN8 3x3 -40 125 OBS XR46110IHBTR
XR46701IRBTR MSOP8 -40 125 OBS XR46110IHBTR
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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
TDFN8 3x3
  • JEDEC Reference: MO-229
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 43.0ºC/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): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 3.0
  • Width: 3.0
  • Thickness: 0.8
  • Lead Pitch: 0.65
  • JEDEC Reference: MO-220
  • MSL Pb-Free: L1 @ 260°C
  • MSL SnPb Eutectic:
  • ThetaJA: 163
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 50
  • Quantity per Reel: 2500
  • Quantity per Tube: 50
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330x12x8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 3
  • Width: 3
  • Thickness: 1.1
  • Lead Pitch: 0.65


Distribution Date Description File
01/12/2021 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.
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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.