Global Patent Index - EP 3086377 A1

EP 3086377 A1 20161026 - LED DRIVER CIRCUIT AND METHOD OF CONTROLLING LED DRIVER CIRCUIT

Title (en)

LED DRIVER CIRCUIT AND METHOD OF CONTROLLING LED DRIVER CIRCUIT

Title (de)

LED-TREIBERSCHALTUNG UND VERFAHREN ZUR STEUERUNG DER LED-TREIBERSCHALTUNG

Title (fr)

CIRCUIT DE PILOTAGE DE LED ET MÉTHODE DE COMMANDE DE CIRCUIT DE PILOTAGE DE LED

Publication

EP 3086377 A1 20161026 (EN)

Application

EP 13899599 A 20131217

Priority

JP 2013083706 W 20131217

Abstract (en)

A controlling part of an LED driver circuit controls a first switch element with a first on-duty ratio if a first terminal voltage is lower than a preset first upper limit value, controls the first switch element with a second on-duty ratio smaller than the first on-duty ratio if the first terminal voltage reaches the first upper limit value, controls a second switch element with a third on-duty ratio if a second terminal voltage is lower than a preset second upper limit value, and controls the second switch element with a fourth on-duty ratio smaller than the third on-duty ratio if the second terminal voltage reaches the second upper limit value.

IPC 8 full level

H01L 33/00 (2010.01)

CPC (source: EP)

H05B 45/37 (2020.01); H05B 45/395 (2020.01); H05B 45/46 (2020.01); H05B 45/10 (2020.01); H05B 45/50 (2020.01); Y02B 20/30 (2013.01)

Designated contracting state (EPC)

AL 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 RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3086377 A1 20161026; EP 3086377 A4 20170802; EP 3086377 B1 20190814; JP 5897768 B2 20160330; JP WO2015092864 A1 20170316; WO 2015092864 A1 20150625

DOCDB simple family (application)

EP 13899599 A 20131217; JP 2013083706 W 20131217; JP 2015511849 A 20131217