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Digital controller for lighting and power supply applications
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The STLUX385A device is part of the STLUX™ family of STMicroelectronics®digital devices tailored for lighting and power conversion applications. The STLUX385A has been successfully integrated in a wide range of architectures and applications, starting from simple buck converters for driving multiple LED strings, boost for power factor corrections, half-bridge resonant converters for high power dimmable LED strings and up to full bridge controllers for HID lamp ballasts.

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Errata Sheet
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Key Features

  • 6 programmable PWM generators (SMEDs) (state machine event driven)
  • 10 ns event detection and reaction
  • Max.1.3 ns PWM resolution
  • Single, coupled and two coupled operational modes
  • Up to 3 internal/external events per SMED
  • DALI (digital addressable lighting interface)
  • Interrupt driven hardware encoder
  • Bus frequency: 1.2, 2.4 or 4.8 kHz
  • IEC 60929 and IEC 62386 compliant plus 24-bit frame extension
  • Configurable noise rejection filter
  • Reverse polarity on Tx/Rx lines
  • 4 analog comparators
  • 4 internal 4-bit references
  • 1 external reference
  • Less than 50 ns propagation time
  • Continuous comparison cycle
  • 8 analog-to-digital converters (ADCs)
  • 10-bit precision, with operational amplifier to extend resolution to 12-bit equivalent
  • Sequencer functionality
  • Input impedance: 1 MΩ
  • Configurable gain value: x 1 or x 4
  • Integrated microcontroller
  • Advanced STM8®core with Harvard architecture and 3-stage pipeline
  • Max. fCPU: 16 MHz
  • Memories
  • Flash and E2PROM with read while write (RWW) and error correction code (ECC)
  • Program memory: 32 Kbytes Flash; data retention 15 years at 85 °C after 10 kcycles at 25 °C
  • Data memory: 1 Kbyte true data E2PROM; data retention:15 years at 85 °C after 100 kcycles at 85 °C
  • RAM: 2 Kbytes
  • ROM: 2 Kbytes
  • Clock management
  • Internal 96 MHz PLL
  • Low-power oscillator circuit for external crystal resonator or direct clock input
  • Internal, user-trimmable 16 MHz RC and low-power 153.6 kHz RC oscillators
  • Clock security system with clock monitor
  • Basic peripherals
  • System and auxiliary timers
  • IWDG/WWDG watchdog, AWU, ITC
  • Reset and supply management
  • Multiple low-power modes (wait, slow, auto-wakeup, Halt) with user definable clock gating
  • Low consumption power-on and power-down reset
  • I/O
  • 12 multifunction bidirectional GPIO with highly robust design, immune against current injection
  • 6 fast digital input DIGIN, with configurable pull-up
  • Communication interfaces
  • UART asynchronous with SW flow control
  • I2C master/slave fast-slow speed rate
  • Operating temperature
  • -40 °C up to 105 °C.

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS9548: Digital controller for lighting and power conversion applications with 6 programmable PWM generators, 96 MHz PLL, DALI
3.0 1,700 KB

Application Notes

Description Version Size
AN4382: 100 W LED street lighting application using STLUX385A
1.0 1,545 KB
AN4460: STEVAL-ILL057V1: four independent high brightness LED
1.0 1,798 KB
AN4461: 100 W LED street lighting application using STLUX385A
2.0 1,519 KB

User Manual

Description Version Size
UM1753: Description of STLUX385A peripheral library
1.0 267 KB
UM1760: STLUX™ SMED configurator 1.0
1.1 2,678 KB
UM1763: Description of STLUX385A examples kit
1.0 418 KB
UM1792: STLUX385A development environment
1.0 1,704 KB

Design Notes & Tips

Description Version Size
DN0028: STEVAL-ILL066V1 - 90Vac-305Vac input
1.0 583 KB

Related Tools and Software

Related Tools and Software

Part Number Description
IAR-EWSTM8 IAR Integrated development environment and optimizing C compiler for STM8
ST-LINK/V2 ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32
STEVAL-ILH007V1 150 W HID digital ballast based on the STLUX385A
STEVAL-ILL057V1 200 W, digital 4-LED channels demonstration board with STLUX385A-controlled current regulation and dimming
STEVAL-ILL066V1 100 W LED street lighting evaluation board using STLUX385A
STEVAL-ILL068V1 STLUX385A digital lighting controller evaluation board
STEVAL385LED4CH 200 W, digital 4-LED channels demonstration board with STLUX385A-controlled current regulation and dimming
STEVAL385LEDPSR 100W LED street lighting demonstration board using STLUX385A
STSW-STLUXLIB01 STLUX385A Peripheral Library
STX-RLINK In-circuit debugger/programmer for STM8, ST7, STM32, STR7 and STR9 microcontrollers

Publications and Collaterals


Description Version Size
STLUX385A 100 W LED street lighting
1.0 2,068 KB
1.0 874 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STLUX385AActiveTSSOP 38Tube_-2Distributor reported inventory date: 2015-03-27
Distributor NameRegionStockMin. order
Farnell Element14Order NowEUROPE501
STLUX385ATRActiveTSSOP 38Tape And Reel_Free Samples2Distributor reported inventory date: 2015-03-27
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA25002500

(*) 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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