EP 2420108 A1 20120222 - DRIVING CIRCUIT FOR LEDS
Title (en)
DRIVING CIRCUIT FOR LEDS
Title (de)
TREIBERSCHALTUNG FÜR LEDS
Title (fr)
CIRCUIT DE COMMANDE POUR LEDS
Publication
Application
Priority
- EP 2010002133 W 20100402
- AT 2132009 U 20090403
- AT 18502009 A 20091120
Abstract (en)
[origin: WO2010112237A1] The invention relates to a driver circuit for an LED, comprising a connection for a mains voltage, a rectifier (GR1), a filter circuit (L1), an inductor(L2), and a switch (S1), wherein the inductor (L2) is magnetized when the switch(S1) is closed, and the inductor (L2) is demagnetized when theswitch (S1) is opened, and the current feeds the LED through theinductor (L2) at least during the phase of the demagnetization,wherein the switch (S1) is always opened only when the current through theswitch (S1) has reached a specified threshold, and thespecified threshold depends on the present amplitude of thesupply voltage Vin.
IPC 8 full level
H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/3725 (2020.01 - EP US); H05B 45/382 (2020.01 - EP US)
Citation (search report)
See references of WO 2010112237A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
WO 2010112237 A1 20101007; CN 102428754 A 20120425; CN 102428754 B 20150708; EP 2420108 A1 20120222; EP 2420108 B1 20200715
DOCDB simple family (application)
EP 2010002133 W 20100402; CN 201080019793 A 20100402; EP 10719585 A 20100402