EP 1278402 B1 20050511 - Circuit for LED with temperature dependent current control
Title (en)
Circuit for LED with temperature dependent current control
Title (de)
Schaltkreis für Leuchtdioden mit temperaturabhängiger Stromregelung
Title (fr)
Circuit pour LED avec commande de courrant dépendent de la temperature
Publication
Application
Priority
DE 10134246 A 20010718
Abstract (en)
[origin: EP1278402A1] The device has a regulator, demand value generator, temperature sensor, a subtracter with a demand current input that drives the regulator, a switch-off device that varies the current demand so the diode current is negligible if a switch-off signal is applied and a controller with a temperature connection, an temperature-dependent output to the subtracter and a temperature-dependent second output to the switch-off input of the switch-off device. The device has a regulator (1), demand value generator (5) and temperature measurement device (4), a subtracter (6) with the demand current value as input that drives the regulator, a switch-off device (7) that varies the current demand value so the diode current is negligible when a switch-off signal is applied and a controller (8) with connections for a temperature measurement parameter, a first output to the subtracter dependent on the temperature measurement value and a temperature-dependent second output to the switch-off input of the switch-off device.
IPC 1-7
IPC 8 full level
H01L 33/00 (2010.01); H05B 37/02 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/18 (2020.01 - EP US)
Designated contracting state (EPC)
AT DE FR GB IT
DOCDB simple family (publication)
EP 1278402 A1 20030122; EP 1278402 B1 20050511; AT E295676 T1 20050515; DE 10134246 A1 20030206; DE 50203055 D1 20050616; JP 2003046132 A 20030214
DOCDB simple family (application)
EP 02011285 A 20020522; AT 02011285 T 20020522; DE 10134246 A 20010718; DE 50203055 T 20020522; JP 2002207265 A 20020716