Stmicroelectronics Design and Application S.r.o.

Stmicroelectronics S.r.l.

Ales Loidl

Ignazio Salvatore Bellomo

Luca Giussani

David Vincenzoni

Pavel Koutensky

Jiri Smutka

Jakub Hajek

A control apparatus for LED diodes includes a dimmer TRIAC electrically connected in series between a power supply and a LED lighting converter. The converter comprises a transformer, with a primary winding coupled with an input terminal and a secondary winding coupled with an output terminal, and a switch coupled to the primary winding to regulate the current through the primary winding and regulate the output voltage. The apparatus comprises a control device adapted to control said switch determining the on period and the off period of the switch to maintain constant the output current to supply said LED diodes. The apparatus comprises a detector connected to the secondary winding of the transformer and adapted to detect the conduction angle of the TRIAC; the control device is adapted to regulate the output current to supply said LED diodes in response to the TRIAC conduction angle detected by the detector.

Control apparatus for LED diodes

A state machine for generating signals configured for generating different signals according to the current state of the machine. The state machine is configured to change state both as a function of an internal timer and as a function of signals representative of events external to the state machine.

State machine for generating a pulse width modulation (PWM) waveform

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Mukarov, Czechia

Ales Loidl