公开(公告)号：EP2339736A1

公开(公告)日：2011-06-29

申请号：EP10197034.1

申请日：2010-12-27

Applicant: STMicroelectronics Srl

Inventor： Adragna, Claudio ,  Novelli, Aldo Vittorio ,  Santoro, Christian Leone

IPC: H02M3/337

CPC classification number: H02M3/3376 ,  Y02B70/1433

Abstract: A control device for a resonant converter is described; the converter comprises a switching circuit (Q1-Q2) adapted to drive a resonant load (Cr, 20). The resonant load comprises at least one transformer (20) with at least a primary winding (L1) and at least a secondary winding (L2) and the converter is adapted to convert an input signal (Vin) into an output signal (Vout); the switching circuit comprises at least a half bridge of first (Q1) and second (Q2) switches and the central point (HB) of said half bridge is connected to said resonant load (Cr, 20). The control device comprises first means (116) adapted to rectify a signal (Vs) representative of the current (Ir) circulating in the primary winding, second means (111) adapted to integrate at least said rectified signal (Vs') and being adapted to generate at least a control signal (HSGD, LSGD) of said switching circuit according to the integrated signal (Vint), third means (FF, CO1, 118, CO2) adapted to send a reset command to said second means so as to inhibit the operation over a time period (Tres) between the instant when said integrated signal reaches or overcomes a first signal (Vc, V2) and the instant of the next zero crossing of the signal (Vs) representative of the current (Ir) circulating in the primary winding. ( Figure 3 )

Abstract translation: 描述了用于谐振转换器的控制装置; 该转换器包括适于驱动谐振负载（Cr，20）的开关电路（Q1-Q2）。 所述谐振负载包括具有至少一个初级绕组（L1）和至少一个次级绕组（L2）的至少一个变压器（20），并且所述转换器适于将输入信号（Vin）转换成输出信号（Vout）; 开关电路至少包括第一（Q1）和第二（Q2）开关的半桥，并且所述半桥的中心点（HB）连接到所述谐振负载（Cr，20）。 控制装置包括适于对表示在初级绕组中循环的电流（Ir）的信号（Vs）进行整流的第一装置（116），适用于至少整合所述整流信号（Vs'）并且被适配的第二装置（111） 以根据积分信号（Vint）产生所述开关电路的至少一个控制信号（HSGD，LSGD）;第三装置（FF，CO1,118，CO2），适于向所述第二装置发送复位命令以便禁止 在所述积分信号达到或克服第一信号（Vc，V2）的瞬间与代表电流（Ir）的信号（Vs）的下一个过零点之间的时间段（Tres） 初级绕组。 （图3）

公开(公告)号：EP2302776B1

公开(公告)日：2012-10-31

申请号：EP10179241.4

申请日：2010-09-24

Applicant: STMicroelectronics Srl

Inventor： Santoro, Christian Leone ,  Novelli, Aldo Vittorio ,  Adragna, Claudio

IPC: H02M3/337 ,  H02M1/08 ,  H02M1/38

CPC classification number: H02M3/337 ,  H02M1/083 ,  H02M1/38 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: There is described a detecting device for the midpoint voltage (Va) of a half bridge circuit of transistors (M1, M2) comprising first (M1) and second (M2) transistors; the half bridge is connected between a voltage supply (Vcc) and a reference voltage (GND) and it is adapted to drive a load (LOAD). The first and second transistors are driven so that said midpoint voltage (Va) undergoes transitions from a low voltage value (LW) to a high voltage value (HW) and vice versa; the circuit comprises a bootstrap capacitor (Cboot) having one terminal connected to the midpoint node and the other terminal connected to a supply circuit (15) of said bootstrap capacitor. The detecting device comprises a further capacitor (Cgd) adapted to be connected between said other terminal of the bootstrap capacitor and circuit means (12, Cpump) adapted to form a low impedance node for the current signal (Isink, Isource) circulating in said further capacitor (Cgd) during the transitions from the low value to the high value and from the high value to the low value of the midpoint voltage (Va). The device comprises detecting means (10) adapted to detect said current signal circulating in said further capacitor and adapted to output at least a first signal (HL_comm, LH_comm) indicating the transitions from the low value to the high value or from the high value to the low value of the midpoint voltage according to said current signal.

公开(公告)号：EP2339734A1

公开(公告)日：2011-06-29

申请号：EP10197021.8

申请日：2010-12-27

Applicant: STMicroelectronics Srl

Inventor： Adragna, Claudio ,  Novelli, Aldo Vittorio ,  Santoro, Christian Leone

IPC: H02M3/337

CPC classification number: H02M3/3376 ,  Y02B70/1433

Abstract: A control device for a resonant converter is described; the converter comprises a switching circuit (Q1-Q2) adapted to drive a resonant load (Cr, 20), said resonant load comprising at least one transformer (20) with at least a primary winding (L1) and at least a secondary winding (L2). The converter is adapted to convert an input signal (Vin) into an output signal (Vout) and the switching circuit comprises at least a half bridge of first (Q1) and second (Q2) switches; the central point (HB) of said half bridge is connected to the resonant load. The control device comprises first means (110) adapted to integrate at least one signal (Vs) representative of a half wave of the current (Ir) circulating in the primary winding (L1); said first means are adapted to generate at least a control signal (HSGD, LSGD) of the switching circuit depending on the integrated signal (Vint). The control device comprises second means (120) adapted to set the equality of the switching-on time period (Ton1, Ton2) of said first and second switches. ( Figure 3 )

Abstract translation: 描述了用于谐振转换器的控制装置; 所述转换器包括适于驱动谐振负载（Cr，20）的开关电路（Q1-Q2），所述谐振负载包括至少一个变压器（20），所述变压器至少具有初级绕组（L1）和至少次级绕组 L2）。 转换器适于将输入信号（Vin）转换为输出信号（Vout），并且开关电路包括第一（Q1）和第二（Q2）开关的至少半桥; 所述半桥的中心点（HB）连接到谐振负载。 所述控制装置包括适于集成表示在所述初级绕组（L1）中循环的电流（Ir）的半波的至少一个信号（Vs）的第一装置（110）。 所述第一装置适于根据积分信号（Vint）至少产生开关电路的控制信号（HSGD，LSGD）。 控制装置包括适于设定所述第一和第二开关的接通时间段（Ton1，Ton2）的相等性的第二装置（120）。 （图3）