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100W LED street lighting demonstration board using STLUX385A

The STEVAL385LEDPSR demonstration board is a complete and configurable solution that efficiently controls a single dimmable high brightness LED string using the STLUX385A digital controller.

The LED efficiency is high during all stages of dimming and the STEVAL385LEDPSR can achieve a 92% efficiency during full load while maintaining a low < 200 mW power consumption during idle periods.

The STLUX385A device handles a primary side regulated power conversion stage as well as all the supported communication links.

The power conversion stage consists of a PFC regulator followed by a “Zero Voltage Switching” (ZVS) LC resonant stage. The high precision dimming is adjusted using a primary side regulation (PSR) control technique.

The LED brightness can be dimmed by controlling the LED current down to a very low level.

The STEVAL385LEDPSR demonstration board provides all the physical communication interfaces such as a DALI, insulated 0-10 and UART. All the communication is managed by the STLUX385A device. The UART interface and STLUX385A flexibility allow to quickly connect the STEVAL385LEDPSR board to alternative interfaces such as the Wi-Fi, power line modems, Bluetooth®and ZigBee®.

This demonstration board is available with an order code STEVAL-ILL066V1 now.

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Errata Sheet
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Data Brief

Key Features

  • STLUX385A based
  • High efficiency (92%)
  • Primary side controlled
  • Up to 100 W (100 V at 1 A or 200 V at 0.5 A)
  • Single isolated output suitable for LED connection
  • Wide input voltage range: 90 V to 265 V AC
  • Adjustable LED current and dimming
  • Output resolution: 11-bit equivalent
  • IDLE mode power consumption: < 200 mW
  • Real-time fault detection and protection (e. g.: short- or open circuit)
  • Remote control via DALI, 0 - 10 V, UART



Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB2161: 100 W LED street lighting application using STLUX385A
2.0 390 KB

Application Notes

Description Version Size
AN4382: 100 W LED street lighting application using STLUX385A
1.0 1,545 KB

Hardware Resources

Bill of Materials

Description Version Size
STEVAL385LEDPSR bill of material
1.0 43 KB

Schematic Pack

Description Version Size
STEVAL385LEDPSR schematics
1.0 94 KB

Publications and Collaterals


Description Version Size
STLUX385A 100 W LED street lighting
1.0 2,068 KB

License Agreement

Description Version Size
Evaluation products license agreement
1.0 126 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL385LEDPSRNRNDSTLUX385A-140No availability reported, please contact our Sales officeEcopack1-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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