Current Controller with Dimming Function
Data Sheets OBS (Obsolete)


Steps 1
Max Voltage (V) 40
Power Line Regulation Y
Dimmable Y; Analog/PWM
Application downlight, high bay, specialty, architectural
Package TDFN-8, MSOP-8
Features Supports Dual Voltage range lighting engines and low power smart lighting
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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
Data Sheets XR46701 Current Controller with Dimming Function Rev1A October 2019 640.6 KB
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
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-187
  • 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: 0.85
  • Lead Pitch: 0.65


Distribution Date Description File
01/12/2021 Product Discontinuation Notice

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