公开(公告)号：US20160043696A1

公开(公告)日：2016-02-11

申请号：US14797934

申请日：2015-07-13

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Marco RAIMONDI ,  Edoardo BOTTI

IPC: H03F1/02 ,  H03F3/21 ,  H03F3/217 ,  H03F3/183

CPC classification number: H03F3/45932 ,  H03F1/0205 ,  H03F3/183 ,  H03F3/185 ,  H03F3/211 ,  H03F3/217 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/129 ,  H03F2200/171 ,  H03F2200/258 ,  H03F2200/351 ,  H03F2200/78 ,  H03F2203/21106

Abstract: A switching amplifier includes a first half-bridge PWM modulator, a second half-bridge PWM modulator, and at least one amplifier stage configured to receive input signals. The switching amplifier also includes a PWM control stage configured to control switching of the first PWM modulator and of the second PWM modulator as a function of the input signals, by respective first PWM control signals and second PWM control signals. The amplifier stage and the PWM control stage have a fully differential structure.

Abstract translation: 开关放大器包括第一半桥PWM调制器，第二半桥PWM调制器和被配置为接收输入信号的至少一个放大器级。 开关放大器还包括PWM控制级，被配置为通过相应的第一PWM控制信号和第二PWM控制信号来控制作为输入信号的函数的第一PWM调制器和第二PWM调制器的切换。 放大器级和PWM控制级具有完全差分结构。

公开(公告)号：US20240014729A1

公开(公告)日：2024-01-11

申请号：US18214751

申请日：2023-06-27

Applicant: STMicroelectronics S.r.l.

Inventor： Edoardo BOTTI ,  Giovanni GONANO ,  Marco RAIMONDI

IPC: H02M1/32 ,  H02M3/157 ,  H02M1/00 ,  H03F3/217

CPC classification number: H02M1/32 ,  H02M3/157 ,  H02M1/0009 ,  H03F3/217

Abstract: A half bridge switching power stage includes high/low side switches driven in response to a cycle-by-cycle protected driving signal derived from a PWM signal. Signals indicative of detected over-currents at said high/low side switches are processed to output the cycle-by-cycle protected driving signal, when the signal indicative of the detected over-current indicates, during a time interval within which the high/low side switch is turned on, that current flowing in the turned on high/low side switch crosses a given threshold, as an inverted PWM signal by turning off the turned on high/low side switch, and otherwise outputting said cycle-by-cycle protected driving signal as a not inverted PWM signal. An anomaly detection circuit receives the signals indicative of the over-current and switches off both the high/low side switches when an anomaly is detected in a pattern of over-current events in the signals indicative of the over-current.

公开(公告)号：US20230412129A1

公开(公告)日：2023-12-21

申请号：US18206331

申请日：2023-06-06

Applicant: STMicroelectronics S.r.l.

Inventor： Edoardo BOTTI ,  Francesco STILGENBAUER ,  Marco RAIMONDI ,  Elena CUSSOTTO

IPC: H03F3/217

CPC classification number: H03F3/2173 ,  H03F2200/03 ,  H03F2200/171 ,  H03F2200/351

Abstract: A switching circuit includes first and second half bridges supplying an electrical load via filter networks. During alternate switching sequences a first transistor pair (high-side in one half bridge and low-side in the other half bridge) is switched to a non-conductive state, and a second transistor pair (high-side in the other half bridge and low-side in the one half bridge) is switched to a conductive state. A current flow line is provided by an inductance, a first switch and a second switch between outputs of the half bridges. In a medium-high power mode, the first and second switches are in the conductive state between switching the first pair of transistors to the non-conductive state and the second pair of transistors to the conductive state. In a low or quiescent power mode, switching the first and second switches to the conductive state is refrained due to application of a longer delay.