Drive circuit for a switch in a switching converter and method for driving a switch in a switching converter
    1.
    发明授权
    Drive circuit for a switch in a switching converter and method for driving a switch in a switching converter 有权
    用于开关转换器中的开关的驱动电路和用于驱动开关转换器中的开关的方法

    公开(公告)号:US07135845B2

    公开(公告)日:2006-11-14

    申请号:US10766299

    申请日:2004-01-28

    IPC分类号: G05F1/40 H02M1/00 H02H7/10

    摘要: The present invention relates to a drive circuit for a switch (T) connected to a rectifier arrangement in a switching converter which provides an output voltage (Vout) from an input voltage (Vin), the drive circuit having the following features: a controller arrangement (40) having at least one control amplifier (OTA1) and a compensation network (41) having at least one capacitor (C4, C5), a signal dependent on the output voltage (Vout) being fed to said controller arrangement and the latter providing a control signal (S4), a protection circuit (30), which is designed to detect at least one critical state of the switching converter and which provides a protection signal (S3) in a manner dependent on the presence of a critical state, the protection circuit (30) having a discharge circuit (32) coupled to the compensation network (41), a signal generating circuit (20), to which the control signal (S4) and the protection signal (S3) are fed and which provides a drive signal (S5) having drive pulses according to the protection signal, the duty ratio of which drive signal is dependent on the control signal (S4).

    摘要翻译: 本发明涉及一种用于开关(T)的驱动电路,该开关(T)连接到开关转换器中的整流器装置,其提供来自输入电压(Vin)的输出电压(Vout),该驱动电路具有以下特征:控制器装置 (40)具有至少一个控制放大器(OTA 1)和具有至少一个电容器(C 4,C 5)的补偿网络(41),取决于输出电压(Vout)的信号被馈送到所述控制器装置, 后者提供控制信号(S 4),保护电路(30),其被设计为检测开关转换器的至少一个临界状态,并以取决于存在的方式提供保护信号(S 3) 一个临界状态,具有耦合到补偿网络(41)的放电电路(32)的保护电路(30),一个信号发生电路(20),控制信号(S 4)和保护信号(S 3) )喂养,并提供a 驱动信号(S 5)具有根据保护信号的驱动脉冲,驱动信号的占空比取决于控制信号(S 4)。