Two-Step LED Current Controller with Line Regulation Compensation
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-8
Features 2-step integrated driver, Better thermal performance, Built in thermal foldback and VIN pin clamp
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The XR46203 is a two-step LED current controller with line regulation compensation for operating over a wide alternating current (AC) voltage source range. It can drive an external N-channel power MOSFET to regulate the current flowing through a high voltage (HV) LED string.

The XR46203 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 PCB design can be very compact to meet various shape requirements. The XR46203 is especially suitable for replacing incandescent light bulbs and linear-type fluorescent lamps.

  • Device
    • Two current step control from a single device
    • Excellent system power regulation over the AC line variation range
    • 6V to 78V chip supply voltage range
    • Over temperature protection
    • Overvoltage protection
    • DFN 3 x 3-8L package
  • System
    • Single board LED lighting solution
    • All solid state components
    • No electrolytic capacitor or MOV required
    • Scalable architecture allows optimization of
    • performance vs. cost
    • Driver-on-board and chip-on-board design solutions available which minimize process flow and assembly cost
    • High PF and low THD performance
    • Flexible PCB layout options
    • TRIAC dimmable

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

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets XR46203 Two-Step LED Current Controller with Line Regulation Compensation 1B August 2018 362.4 KB
Product Brochures Power Management Brochure October 2020 2.4 MB
Product Briefs XR46203 Product Brief October 2016 98.5 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XR46203IHBTR 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 Status Suggested Replacement PDN
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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


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

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