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


Steps 2
Max Voltage (V) 78
IOUT MAX (mA) 180
Power Line Regulation N
Dimmable Y; Triac
Application downlight, high bay, specialty, architectural
Package DFN-6
Features 2-step integrated driver, Smallest footprint solution, Built in thermal foldback and VIN pin clamp
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The XR46050 is a two-step LED current controller for bulb applications powered directly by an alternative current (AC) voltage source. It can drive an external N-channel power MOSFET to regulate the current flowing through a high voltage (HV) LED string.

The XR46050 works as a constant current regulator to control two-step current levels for AC step drivers with a simple structure. It also provides linear-type over temperature protection (OTP).

The PCB design can be very compact to meet various shape requirements. It is especially suitable for replacing “A” series LED light bulbs and candelabra LED bulbs.

  • Device
    • 6V to 78V chip supply voltage range
    • Over temperature protection
    • Single board LED lighting solution available
    • DFN 2 x 2-6L packages
  • System
    • All solid state components
    • No electrolytic capacitor required
    • Fewer components and simple solution for LED lighting
    • Scalable architecture allows optimization of
    • performance vs. cost
    • Driver-on-board and chip-on-board design solution available which minimizes process flow and assembly cost
    • High PF and Low THD performance
    • Flexible PCB layout options

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

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets XR46050 Two-Step LED Current Controller 1B July 2018 405.2 KB
Product Brochures Power Management Brochure October 2020 2.4 MB
Product Briefs XR46050 Product Brief November 2016 145.6 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XR46050IHBTR 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
XR46050IHBTR TDFN6 2x2 -40 85 OBS XR46084EHTR-ADJ (x2)
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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
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
06/09/2021 Product Discontinuation Notice - Addendum (See PDN for details)
01/12/2021 Product Discontinuation Notice

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