公开(公告)号：US20020074981A1

公开(公告)日：2002-06-20

申请号：US09969115

申请日：2001-10-01

Applicant: STMicroelectronics S.r.l.

Inventor： Atanasio La Barbera ,  Giovanni Luca Torrisi

IPC: G05F001/40

CPC classification number: H02M7/538

Abstract: An electronic circuit is for optimizing or reducing switching losses in current-driven power devices and includes a switching power device connected to an electric load. The power devices has at least one control terminal arranged to receive a predetermined drive current value produced by a first current generator. The control terminal also receives an additional drive current portion produced by a second independent current generator. Advantageously, the electronic circuit includes a control circuit for controlling a switch connected between the second current generator and the control terminal of the switching power device during the turn-on and turn-off phases of the power device.

公开(公告)号：US20020101182A1

公开(公告)日：2002-08-01

申请号：US09970164

申请日：2001-10-01

Applicant: STMicroelectronics S.r.l.

Inventor： Natale Aiello ,  Atanasio La Barbera ,  Giovanni Luca Torrisi

IPC: H05B037/02

CPC classification number: H05B39/045 ,  Y02B20/142 ,  Y10S315/07

Abstract: An electronic circuit is for the gradual start-up of electric loads, particularly halogen lamps. The circuit may include a power device having an output terminal connected to the electric load and having at least one control terminal receiving a predetermined driving current value. The circuit may further include a comparator having a first input terminal coupled to the power device output and a second input terminal kept at a reference potential. The comparator output may be connected to a controlled switch inserted upstream of the control terminal to control the opening of the switch and adjust the start-up phase of the power device according to the value of the reference potential.

Abstract translation: 电子电路用于逐步启动电力负载，特别是卤素灯。 电路可以包括具有连接到电负载的输出端并具有接收预定驱动电流值的至少一个控制端的功率器件。 电路还可以包括具有耦合到功率器件输出的第一输入端和保持在参考电位的第二输入端的比较器。 比较器输出可以连接到控制端子上游的受控开关，以控制开关的开启，并根据参考电位的值调节功率器件的启动阶段。

公开(公告)号：US20020085331A1

公开(公告)日：2002-07-04

申请号：US09969552

申请日：2001-10-02

Applicant: STMicroelectronics S.r.l.

Inventor： Natale Aiello ,  Atanasio La Barbera ,  Vincenzo Randazzo ,  Giovanni Luca Torrisi

IPC: H02H005/04

CPC classification number: H05B41/2856

Abstract: An electronic thermal protection circuit is for high currents which can occur in the start-up phase in lighting converters. The circuit is associated with a power device having an output terminal connected to an electric load and at least one control terminal receiving a predetermined driving current value by a driving circuit portion. Advantageously, an integrated temperature sensor is provided to detect the temperature of the power device, and an output stage is connected downstream of the sensor to switch off the driving circuit portion when a predetermined operation temperature is exceeded.

Abstract translation: 电子热保护电路适用于在照明转换器启动阶段可能发生的高电流。 该电路与具有连接到电负载的输出端子和由驱动电路部分接收预定驱动电流值的至少一个控制端子的功率器件相关联。 有利地，提供集成温度传感器以检测功率器件的温度，并且当超过预定操作温度时，输出级连接在传感器的下游，以关断驱动电路部分。