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Analog wall dimmer for CFL/LED lamps based on the TS820 (USA version 110 V)
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The STEVAL-ILD003V2 demonstration board is designed to propose a low-cost analog dimmer topology using a sensitive SCR TS820-600FP. The dimmer can drive typical low-consumption lamps, particularly CFL and LED dimmable lamps.

Through-hole technology is used for the most important components such as LC filter, gate resistor, turn-on delay capacitor, etc., in order to allow board modification, if needed.

The STEVAL-ILD003V2 eliminates flickering thanks to its continuous current applied through the sensitive SCR gate. This dimmer could easily replace a standard low-cost analog Triac light dimmer using a Diac-controlled circuit.

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Errata Sheet
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Data Brief

Key Features

  • Operation for 2-wire wall dimmer
  • Leading-edge control (compatible with all lamps commonly found on the market)
  • Operation on 120 V line rms voltage (98 to 132 V) and 50 Hz or 60 Hz line frequency
  • Dimmable power range with halogen, CFL and LED lamps (with 27 °C/W heatsinks mounted on SCRs12:
  • 3 to 350 W for 110/120 V rms line
  • Maximum operating ambient temperature:60 °C
  • Power efficiency @ 350 W / 120 V > 98.5%
  • Standby losses @ 120 V < 0.3 W (could be reduced to 0 if potentiometer features a mechanical switch to open the circuit at minimum setting)
  • RoHS compliant
  • Compliance with EMC standards
  • IEC 61000-4-4: criteria A for more than 4 kV


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1481: Analog wall dimmer for CFL/LED lamps based on the TS820 (USA version 110 V)
3.0 115 KB

User Manual

Description Version Size
UM1513: STEVAL-ILD003V2: SCR dimmer, US version
2.0 925 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-ILD003V2 gerber files
1.0 54 KB

Bill of Materials

Description Version Size
3.1 39 KB

Schematic Pack

Description Version Size
STEVAL-ILD003V2 schematics
1.0 28 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ILD003V2ActiveTS820Buy Direct86.97Distributor reported inventory date: 2016-02-06
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA20

(*) 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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