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    Method for switching off a switched-mode power supply in the event of short-circuit, and a switched-mode power supply
    1.
    发明授权
    Method for switching off a switched-mode power supply in the event of short-circuit, and a switched-mode power supply 有权
    在短路情况下关断开关电源的方法以及开关式电源

    公开(公告)号：US6434023B2

    公开(公告)日：2002-08-13

    申请号：US76123601

    申请日：2001-01-17

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： PRELLER PETER

    IPC: H02M1/00 ,  H02M1/32 ,  H02M3/335 ,  H02M7/44 ,  H02M7/68

    CPC classification number: H02M1/32 ,  H02M3/335

    Abstract: In order to achieve complete short-circuit protection irrespective of a location of a short-circuit in a switched-mode power supply having a controllable switch in a primary circuit, the controllable switch is opened when a voltage drop across an electrolytic capacitor in a primary circuit falls below a threshold value which can be predetermined. For this purpose, a capacitive voltage device containing two capacitances is connected in parallel with the electrolytic capacitor. A potential at a center tap of the capacitive voltage divider is compared in a comparator with a reference voltage, which opens the controllable switch when the potential at the center tap falls below the reference voltage.

    Abstract translation: 为了实现完全的短路保护，无论在初级电路中具有可控开关的开关式电源中的短路位置如何，当在主电路中的电解电容器两端的电压降时，可控开关断开 电路低于可以预定的阈值。 为此，包含两个电容的电容电压装置与电解电容器并联连接。 在电容分压器的中心抽头处的电位在比较器中与参考电压进行比较，当中心抽头的电位低于参考电压时，该参考电压打开可控开关。

    3.
    发明专利
    未知

    公开(公告)号：DE10038988B4

    公开(公告)日：2004-12-30

    申请号：DE10038988

    申请日：2000-08-10

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： PRELLER PETER

    IPC: H02M3/335 ,  H04N5/63 ,  H02M3/28

    Abstract: The voltage converter has 3 inductively coupled inductive elements (Wa,Wb,Wc), with a controlled switch (SW) for switching the input voltage (Ui) to the first inductive element and a supply voltage storage capacitor (CS) coupled via a first diode (DD) to the second inductive element and via a second diode (D1) in series with a run-up resistor (RS) to the input voltage. A control circuit (IC) supplied from the storage capacitor controls the switch in dependence on the storage capacitor supply voltage in a normal mode or a stand-by mode, a higher output voltage provided at the third inductive element in the normal mode than in the stand-by mode. An auxiliary voltage generator (AVG), between the storage capacitor and the second inductive element, provides the control energy for a burst operating mode, with automatic adoption of the burst duration.

    4.
    发明专利
    未知

    公开(公告)号：DE10112537B4

    公开(公告)日：2004-12-23

    申请号：DE10112537

    申请日：2001-03-15

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： PRELLER PETER

    IPC: H02M3/335 ,  H02M3/28 ,  H03K17/16 ,  H03K17/30

    Abstract: A method for driving a switch in a switched-mode power supply, in which the switch is connected in series with a primary coil of a transformer and in which a control signal dependent on an output voltage is available. In this case, reference instants at which a voltage present across the switch corresponds to a first reference voltage value or at which a voltage present across the primary coil corresponds to a second reference voltage value are detected and counted, the switch being closed again only after the number of detected reference instants has reached a comparison numerical value. The invention furthermore relates to a switched-mode power supply for realizing the method according to the invention.

    7.
    发明专利
    未知

    公开(公告)号：DE59802565D1

    公开(公告)日：2002-01-31

    申请号：DE59802565

    申请日：1998-08-14

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： NIEDERREITER HANS ,  PRELLER PETER

    IPC: H02M3/28 ,  G01R22/00 ,  H02M3/335 ,  H04N5/63

    Abstract: A circuit arrangement is provided that is suitable for determining the output power of switched-mode power supplies. A charge capacitor is charged with a constant current for the duration of the discharging time of a transformer. The voltage across the charge capacitor is integrated by a downstream integration element. The output voltage of the integration element is proportional to the mean power of the switched-mode power supply. The inventive circuit arrangement takes into consideration that the charging and discharging times of the transformer can be different for different switching frequencies of the switched-mode power supply, even when the power output of the switched-mode power supply is the same.

    8.
    发明专利
    未知

    公开(公告)号：DE10002325A1

    公开(公告)日：2001-08-09

    申请号：DE10002325

    申请日：2000-01-20

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： PRELLER PETER

    IPC: H02M1/00 ,  H02M1/36 ,  H02M3/335 ,  H02M3/28

    Abstract: In order to start a switching power supply in an energy saving manner, the energy that is collected by the Y-capacitors (C2, C4) is transmitted via a diode (D2) to a capacitor (C1) that is located on the secondary side. Once the voltage in this capacitor (C1) reaches a first predefinable minimum value, the voltage is applied to an impulse generator (PS) as an input voltage and the generator starts the switching power supply. Once the voltage in an additional capacitor (C1) on the secondary side reaches a second predefinable minimum value, the voltage in the capacitor (C1) is also applied as an input voltage to a control unit, preferably a microprocessor ( mu P) which controls the impulse generator (PS).

    9.
    发明专利
    未知

    公开(公告)号：DE19732169B4

    公开(公告)日：2007-10-11

    申请号：DE19732169

    申请日：1997-07-25

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： PRELLER PETER

    IPC: H02M3/28 ,  H02M3/335 ,  H02M3/338

    Abstract: An apparatus for supplying a DC voltage to a load which can be connected to output terminals. The apparatus has a semiconductor switching element for a clocked application of a supply voltage to a primary of a transformer on the basis of a sequence of driving pulses applied to a control input of the semiconductor switching element. A driving circuit is provided for producing driving pulses. The driving circuit has a first input terminal for receiving an analog load-dependent control signal which is produced by a measuring configuration and governs a duration of the individual driving pulses. The driving circuit also has a second input terminal for receiving a starting signal defining turn-on instants of the driving pulses. The apparatus further has a pulse generator with an output terminal, connected to the input terminal of the driving circuit, for providing the pulsed starting signal on the basis of a control signal. The control signal is also supplied to a first input terminal of the pulse generator, in which pulse generator, the temporal spacing of the individual pulses of the starting signal can be influenced by the control signal.

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