公开(公告)号：EP1363385A1

公开(公告)日：2003-11-19

申请号：EP02425295.9

申请日：2002-05-15

Applicant: STMicroelectronics S.r.l.

Inventor： Aiello, Natale ,  Gennaro, Francesco Giovanni

IPC: H02M1/12 ,  H02M3/156

CPC classification number: H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

Abstract: A method for detecting the null current condition in an inductor a PWM driven inductor connected between a voltage source node and a second circuit node of a line for outputting current to a load, comprises time differentiating the voltage present on the second node generating a derivative signal, monitoring the instant when the derivative signal becomes negative and signaling the verification of a null current condition in the inductor each time that the derivative signal becomes negative.
A fully integrable PWM driving circuit implementing this method, detecting the null current condition in an inductor connected between a voltage source node and a second node of a line for outputting current toward a load, comprises a power switch connected between the second node and a ground node of the circuit, a PWM control circuit of the power switch in function of load conditions including a bistable stage coupled to a control terminal of the power switch, and comprises a time differentiating circuit means coupled to the second node, generating a pulse setting the bistable output stage when the voltage on the second node drops.

Abstract translation: 一种用于在电感器连接在电压源节点和输出婷电流到负载的线的第二电路节点之间的PWM驱动的电感器的衍生物检测所述零电流状态的方法，包括时间微分的电压存在于第二节点生成的信号上 ，监测即时当导数信号变为负和信令零电流条件的验证在电感器每次做的导数信号变为负。 一个完全积PWM驱动电路实施该方法中，检测在连接在电压源节点和用于向负载输出婷电流的线的第二节点之间电感器中的零电流状态，包括连接在所述第二之间的功率开关 节点与电路的接地节点，在负荷条件，包括耦合到所述功率开关的控制端的双稳态阶段功能的电力开关的PWM控制电路，以及包括时间微分电路装置，耦合到所述第二节点，产生 一个脉冲设定双稳态输出级。当第二个节点上的电压下降。

公开(公告)号：EP1748538A1

公开(公告)日：2007-01-31

申请号：EP05425565.8

申请日：2005-07-29

Applicant: STMicroelectronics S.r.l.

Inventor： Di Franco, Fabrizio Gaetano ,  Leonardi, Cosimo ,  Stracquadaini, Rosario Davide ,  Gennaro, Francesco Giovanni

IPC: H02M1/00

CPC classification number: H02M1/32

Abstract: A switching power supply includes input terminals (100a, 100b), which receive a first voltage (V AC ), and a switching converter stage (2), provided with a first switching device (8). The power supply further includes a second switching device (105), connected between the input terminals (100a, 100b) and the switching converter stage (2), and an activation device (110, 111), associated to the second switching device (105) for controlling the second switching device (105) so as to limit a second voltage (V INL ) applied to the switching converter stage (2).

Abstract translation: 一种开关电源包括输入端子（100A，100B）其中接收第一电压（V AC），和开关转换器级（2），设置有第一开关装置（8）。 所述电源进一步包括连接在输入端子（100A，100B）和所述开关转换器级（2）之间的第二开关装置（105），以及相关联的第二开关装置激活设备（110，111）上（105 ），用于控制所述第二开关器件（105），以便限制第二电压（V INL）施加到开关转换器级（2）。