公开(公告)号：EP2339735A1

公开(公告)日：2011-06-29

申请号：EP10197026.7

申请日：2010-12-27

Applicant: STMicroelectronics Srl

Inventor： Adradna, Claudio

IPC: H02M3/337

CPC classification number: H02M3/3376 ,  Y02B70/1433

Abstract: There is described an integrated circuit (103) for an oscillator (101) adapted to drive a control device (100) of a switching resonant converter; the converter comprises a switching circuit (Q1-Q2) adapted to drive a resonant load (Cr, 20) provided with at least one transformer (20) with at least a primary winding (L1) and at least a secondary winding (L2). The control device is adapted to drive the switching circuit and the converter is adapted to convert an input signal (Vin) into an output signal (Vout). The integrated circuit comprises first means (Q20, Q3-Q7, 113-115) adapted to charge and discharge a capacitor (Ct) by a first current signal (Ic + i p (t)) such that the voltage (Vct) at the terminals of said capacitor is between first (Vv) and second (Vp) reference voltages, with said second reference voltage higher than said first reference voltage. The current signal (Ic + i p (t)) comprises a second current signal (Ic) representative of the feedback loop that controls the output signal (Vout) of the converter; the integrated circuit comprises second means (110) adapted to rectify a signal (Vs) representative of the current (Ir) circulating in the primary winding (L1) and the first current signal (Ic + i p (t)) comprises a third current signal (i p (t)) proportional to the rectified signal. ( Figure 3 )

Abstract translation: 中，描述了在用于在振荡器（101）angepasst到驱动开关谐振变换器的控制设备（100）的集成电路（103）; 该转换器包括一个开关电路（Q1-Q2）angepasst驱动谐振负载（CR，20）设置有至少一个变压器（20），具有至少一个初级绕组（L1）和至少一个次级绕组（L2）。 该控制装置是angepasst来驱动开关电路和转换器是angepasst对输入信号（Vin）转换为在输出端信号（Vout）。 第一集成电路包括装置（Q20，Q3-Q7，113-115）angepasst充电和由第一电流信号放电的电容器（CT）（IC + IP（t））的检查在端子做的电压（VCT） 说的电容器是第一（VV）和第二（VP）的参考电压之间，其中所述第二参考电压高于所述第一参考电压高。 电流信号（IC + I P（t））的包含第二电流信号（Ic）的代表的反馈环路的那样控制输出信号（Vout）的转换器的; 该集成电路包括第二装置（110）angepasst纠正信号（Vs）代表的电流（Ir）的的在初级绕组（L1）和所述第一电流信号（Ic的+ IP（t））的循环包括第三电流信号 （IP（t））的成比例的整流信号。 （图3）