公开(公告)号：US20170317597A1

公开(公告)日：2017-11-02

申请号：US15653145

申请日：2017-07-18

Applicant: STMicroelectronics S.r.l.

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

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491 ,  Y02P80/112

Abstract: A circuit includes a timer circuit configured to generate a first control signal defining a first time period and a second control signal defining a second time period. A controller is configured to control a high-side and a low-side transistor of a half-bridge circuit in response to the first and second control signals only during a first switching cycle of the half-bridge circuit. The half-bridge circuit includes a bootstrap capacitor coupled to a node between the high-side and low-side transistors. The controller turns on the low-side transistor for the first time period during the first switching cycle and configured turns off the low-side and the high-side transistors for the second time period during the first switching cycle.

公开(公告)号：US09735686B2

公开(公告)日：2017-08-15

申请号：US14860570

申请日：2015-09-21

Applicant: STMicroelectronics S.r.l.

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

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A control device controls a switching circuit for a converter. The switching circuit comprises a half-bridge having a high-side transistor and a low-side transistor. The control device comprises a controller configured to control turning on and turning off said two transistors, so that a square-wave voltage is applied to the transformer primary. The controller is configured to start switching the half-bridge by turning on the low-side transistor. The control device comprises a first timer configure to initially turn on the low-side transistor for a duration given by a first time period useful for pre-charging a bootstrap capacitor couplable to the middle point of the half-bridge, and a second timer configured to keep the low-side transistor and the high-side transistor turned off for a second time period immediately following the first time period and having a longer duration than the first time period.

公开(公告)号：US20130293267A1

公开(公告)日：2013-11-07

申请号：US13888180

申请日：2013-05-06

Applicant: STMICROELECTRONICS S.R.L.

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

IPC: H03K17/082

CPC classification number: H03K17/082 ,  H02M1/32 ,  H02M1/36 ,  H02M1/38 ,  H02M3/3382 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A control device of a switching circuit of a resonant apparatus is described. The switching circuit comprises at least one half-bridge having a high-side transistor and a low-side transistor connected between an input voltage and a reference voltage; the resonant apparatus comprises a resonant load. The control device is configured to determine the on time period and the off time period of the transistors alternatively and a dead time of both the transistors so that a periodic square-wave voltage is applied to the resonant load. The control device comprises a detector adapted to detect the current sign flowing through the resonant load and a correction circuit configured to extend the current operating time period of said two transistors in response to at least the current sign detected from the detection means.

Abstract translation: 描述谐振装置的开关电路的控制装置。 开关电路包括具有连接在输入电压和参考电压之间的高侧晶体管和低侧晶体管的至少一个半桥; 谐振装置包括谐振负载。 控制装置被配置为确定晶体管的导通时间段和关闭时间段以及两个晶体管的死区时间，使得周期性方波电压被施加到谐振负载。 控制装置包括检测器，其适于检测流过谐振负载的电流符号，以及校正电路，其被配置为响应于至少从检测装置检测到的电流符号来扩展所述两个晶体管的当前工作时间段。

公开(公告)号：US10250145B2

公开(公告)日：2019-04-02

申请号：US15653145

申请日：2017-07-18

Applicant: STMicroelectronics S.r.l.

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

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/00

Abstract: A circuit includes a timer circuit configured to generate a first control signal defining a first time period and a second control signal defining a second time period. A controller is configured to control a high-side and a low-side transistor of a half-bridge circuit in response to the first and second control signals only during a first switching cycle of the half-bridge circuit. The half-bridge circuit includes a bootstrap capacitor coupled to a node between the high-side and low-side transistors. The controller turns on the low-side transistor for the first time period during the first switching cycle and configured turns off the low-side and the high-side transistors for the second time period during the first switching cycle.

公开(公告)号：US09698688B2

公开(公告)日：2017-07-04

申请号：US14846389

申请日：2015-09-04

Applicant: STMicroelectronics S.r.l.

Inventor： Claudio Adragna ,  Claudio Spini ,  Aldo Vittorio Novelli ,  Fabrizio Bognanni

IPC: H02M3/335 ,  H02M3/158 ,  H02M3/337 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M3/33507 ,  H02M3/3376 ,  H02M2001/0035 ,  Y02B70/1433 ,  Y02B70/16

Abstract: An effective method enhances energy saving at low load in a resonant converter with a hysteretic control scheme for implementing burst-mode at light load. The method causes a current controlled oscillator of the converter to stop oscillating when a feedback control current of the output voltage of the converter reaches a first threshold value, and introduces a nonlinearity in the functional relation between the frequency of oscillation and said feedback control current or in a derivative of the functional relation, while the control current is between a lower, second threshold value and the first threshold value, such that the frequency of oscillation remains equal or smaller than the frequency of oscillation when the control current is equal to the second threshold value. Several circuital implementations are illustrated, all of simple realization without requiring any costly microcontroller.

公开(公告)号：US20160013722A1

公开(公告)日：2016-01-14

申请号：US14860570

申请日：2015-09-21

Applicant: STMicroelectronics S.r.l.

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

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A control device controls a switching circuit for a converter. The switching circuit comprises a half-bridge having a high-side transistor and a low-side transistor. The control device comprises a controller configured to control turning on and turning off said two transistors, so that a square-wave voltage is applied to the transformer primary. The controller is configured to start switching the half-bridge by turning on the low-side transistor. The control device comprises a first timer configure to initially turn on the low-side transistor for a duration given by a first time period useful for pre-charging a bootstrap capacitor couplable to the middle point of the half-bridge, and a second timer configured to keep the low-side transistor and the high-side transistor turned off for a second time period immediately following the first time period and having a longer duration than the first time period.

Abstract translation: 控制装置控制转换器的开关电路。 开关电路包括具有高侧晶体管和低侧晶体管的半桥。 控制装置包括控制器，其被配置为控制导通和截止所述两个晶体管，使得方波电压被施加到变压器初级。 控制器配置为通过打开低端晶体管来开始切换半桥。 控制装置包括第一定时器，其配置为在第一时间周期内最初使低侧晶体管导通，该持续时间可用于对可耦合到半桥的中点的自举电容器进行预充电，以及第二定时器配置 为了保持低侧晶体管和高侧晶体管在第一时间段之后紧接第二时间段并且具有比第一时间段更长的持续时间。

公开(公告)号：US09094006B2

公开(公告)日：2015-07-28

申请号：US13888180

申请日：2013-05-06

Applicant: STMicroelectronics S.r.l.

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

IPC: H02M3/156 ,  H03K17/082 ,  H02M1/32 ,  H02M3/338 ,  H02M1/36 ,  H02M1/38 ,  H02M1/00

CPC classification number: H03K17/082 ,  H02M1/32 ,  H02M1/36 ,  H02M1/38 ,  H02M3/3382 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A control device of a switching circuit of a resonant apparatus is described. The switching circuit comprises at least one half-bridge having a high-side transistor and a low-side transistor connected between an input voltage and a reference voltage; the resonant apparatus comprises a resonant load. The control device is configured to determine the on time period and the off time period of the transistors alternatively and a dead time of both the transistors so that a periodic square-wave voltage is applied to the resonant load. The control device comprises a detector adapted to detect the current sign flowing through the resonant load and a correction circuit configured to extend the current operating time period of said two transistors in response to at least the current sign detected from the detection means.

Abstract translation: 描述谐振装置的开关电路的控制装置。 开关电路包括具有连接在输入电压和参考电压之间的高侧晶体管和低侧晶体管的至少一个半桥; 谐振装置包括谐振负载。 控制装置被配置为确定晶体管的导通时间段和关闭时间段以及两个晶体管的死区时间，使得周期性方波电压被施加到谐振负载。 控制装置包括检测器，其适于检测流过谐振负载的电流符号，以及校正电路，其被配置为响应于至少从检测装置检测到的电流符号来扩展所述两个晶体管的当前工作时间段。