STMicroelectronics Analog wall dimmer for CFL/LED lamps based on the TS820 (USA version 110 V) STEVAL-ILD003V2 STEVAL-ILD003V2 Data Sheet

For further information contact your local STMicroelectronics sales office.

February 2013

Doc ID 022481 Rev 3

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Analog wall dimmer for CFL/LED lamps based on the TS820

(USA version 110 V)

■

Operation for 2-wire wall dimmer

■

Leading-edge control (compatible with all 
lamps commonly found on the market)

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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 SCRs

(a)

 

(b)

:

– 3 to 350 W for 110/120 V rms line

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Maximum operating ambient 
temperature:60 °C

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Power efficiency @ 350 W / 120 V > 98.5%

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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

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IEC 61000-4-4: criteria A for more than 4 kV

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.

         

a.

Higher power can be reached with a different filter 
inductor and a bigger SCR heatsink

b.

200 W is the maximum allowed power without an SCR 
heatsink