公开(公告)号：EP1881745A1

公开(公告)日：2008-01-23

申请号：EP06425504.5

申请日：2006-07-20

Applicant: STMicroelectronics S.r.l.

Inventor： Messina, Sebastiano ,  Aiello, Natale ,  Morreale, Danilo Antonio Claudio

IPC: H05B41/36

CPC classification number: H05B41/36

Abstract: A device for recognizing the power supply of discharge lamps comprises an output block for the power supplying of the lamp and a power-factor correction block 20 for correcting the power factor on the basis of a given conduction time. A control circuit, such as a microcontroller, which is sensitive to the supply voltage of the lamp, is able to detect the striking voltage of the lamp and to obtain a first recognition of the power supply of the lamp as a function of the striking voltage, likewise estimating the conduction time for the correction of the power factor as a function of the power supply corresponding to the aforesaid first recognition. The control circuit is configured for measuring the conduction time for the correction of the power factor effectively applied to the lamp and comparing the estimated conduction time for the correction of the power factor with the measured one. Consequently:
- i) if the estimated conduction time and the measured conduction time are consistent with one another, the control circuit recognizes the power supply as the one corresponding to the first recognition; and
- ii) if the estimated conduction time and the measured conduction time are not consistent with one another, the control circuit recognizes the power supply as the one corresponding to the conduction time measured.

Abstract translation: 用于识别放电灯的电源的装置包括用于灯的供电的输出块和用于基于给定导通时间校正功率因数的功率因数校正块20。 对灯的电源电压敏感的诸如微控制器的控制电路能够检测灯的击打电压，并且获得作为击打电压的函数的灯的电源的第一识别 ，同样估计作为与上述第一识别相对应的电源的函数的功率因数校正的导通时间。 控制电路被配置为测量用于校正有效地施加到灯的功率因数的导通时间，并将用于校正功率因数的估计导通时间与测量的功率因数进行比较。 因此：i）如果估计的导通时间和测量的导通时间彼此一致，则控制电路将电源识别为与第一识别相对应的电源; 和 - ii）如果估计的导通时间和测量的导通时间彼此不一致，则控制电路将电源识别为对应于测量的导通时间的电源。