公开(公告)号：US20230140765A1

公开(公告)日：2023-05-04

申请号：US17967089

申请日：2022-10-17

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Leonardo PEDONE ,  Simone SCADUTO ,  Rossella GAUDIANO ,  Matteo BRIVIO ,  Matteo VENTURELLI

IPC: G01R31/317 ,  H03M1/78 ,  H03M1/74

Abstract: A digital-to-analog converter (DAC) includes a switching network and built-in-self-test (BIST) circuitry. The DAC, in operation, generates analog output signals in response to input codes of a set of input codes of the DAC. The BIST circuitry sequentially applies codes of a determined subset of codes of the set of input codes to test the plurality of switches. The determined subset of codes has fewer codes than the set of input codes. The BIST circuitry detects failures of switches of the plurality of switches based on responses of the DAC to the applied codes. In response to detecting a failure of a switch, the BIST generates a signal indicating a failure of the switching network.

公开(公告)号：US20220360177A1

公开(公告)日：2022-11-10

申请号：US17730878

申请日：2022-04-27

Applicant: STMicroelectronics S.r.l.

Inventor： Gerardo CASTELLANO ,  Leonardo PEDONE ,  Filippo MINNELLA ,  Marcello RAIMONDI

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/08

Abstract: A control circuit for a multiphase buck converter includes a regulator circuit and a plurality of phase control circuits. The regulator circuit generates a regulation signal based on a feedback signal and a reference signal, and each phase control circuit receives a current sense signal and generates a respective PWM signal based on the respective current sense signal and the regulation signal. The control circuit includes a first selector circuit and a second selector circuit configured to receive a selection signal and selectively connect each phase control circuit of a subset of the phase control circuits to a PWM signal for driving a respective stage of the multiphase buck converter, and to a current sense signal provided by the respective stage of the multiphase buck converter. A selection control circuit generates the selection signal in order to connect the phase control circuits to different stages of the multiphase buck converter.