PROBLEM TO BE SOLVED: To provide a light emission element device that operates based upon a control signal from a control part when the control part is normal, and makes a light emission element illuminate without reference to the control signal from the control part when the control part is abnormal.SOLUTION: A light emission element drive device has an output voltage supply part which generates an output voltage Vo from an input voltage Vi and supplies the output voltage Vo to a light emission element Z1 based upon a PWM dimming signal S1 from a control IC 200 on receiving a signal indicating abnormality of the control IC 200, and an emergency driving part which makes the light emission element Z1 illuminate without reference to the control signal from the control IC 200. A light emission element driving IC 130, a coil L1, an output capacitor C1, a sense resistance Rs, and a capacitor C2 serve as the output voltage supply part and emergency driving part.SELECTED DRAWING: Figure 5
【課題】制御部が正常な場合は制御部からの制御信号に基づいて動作し、制御部が異常な場合は制御部からの制御信号にかかわらず発光素子を点灯させる発光素子駆動装置を提供する。【解決手段】発光駆動装置は、制御IC200からのPWM調光信号S1に基づいて、入力電圧Viから出力電圧Voを生成して出力電圧Voを発光素子Z1に供給する出力電圧供給部と、制御IC200の異常を示す信号を受信した場合は制御IC200からの前記制御信号にかかわらず発光素子Z1を点灯させる非常駆動部と、を有する。発光素子駆動IC130、コイルL1、出力コンデンサC1、センス抵抗Rs、及びコンデンサC2は、前記出力電圧供給部と前記非常駆動部を兼ねている。【選択図】図5
LIGHT EMISSION ELEMENT DRIVE DEVICE, LIGHT EMISSION DEVICE, AND VEHICLE
発光素子駆動装置、発光装置、車両
2016-05-12
Patent
Electronic Resource
Japanese
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / H01L Halbleiterbauelemente , SEMICONDUCTOR DEVICES / H05B ELECTRIC HEATING , Elektrische Heizung |
LIGHT EMISSION ELEMENT DRIVE DEVICE, LIGHT EMISSION DEVICE, AND VEHICLE
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