公开(公告)号：US11067611B2

公开(公告)日：2021-07-20

申请号：US16357212

申请日：2019-03-18

Applicant: RENESAS ELECTRONICS AMERICA INC.

Inventor： Travis Guthrie ,  Narendra Kayathi

IPC: G01R19/257 ,  H03F3/217 ,  G01R19/00 ,  H02M3/157 ,  G01R19/25

Abstract: According to certain aspects, a predictive tracking scheme is provided for sampling inductor currents in a digital PWM controller used for high-bandwidth voltage regulation. In one or more embodiments, the predicted current derived from the PWM waveform is fed forward to the current sense ADC in order to reduce the required conversion range. These and other embodiments only need to convert a few of the LSB of the ADC in order to correct the largest error expected in the synthesizer.

公开(公告)号：US10574253B1

公开(公告)日：2020-02-25

申请号：US16358512

申请日：2019-03-19

Applicant: Renesas Electronics America Inc.

Inventor： Travis Guthrie ,  Narendra Kayathi

IPC: H03M1/12 ,  G01R15/18 ,  G01R19/25

Abstract: According to certain aspects, the present embodiments provide a solution for sampling and converting an analog signal at high frequencies but with low power consumption. In some embodiments, a low power, low resolution, AC coupled ADC is used to track the high frequency component of the analog input signal, in parallel with a high resolution ADC to sense the DC signal at a significantly lower sample rate. According to some aspects, the AC coupled ADC requires no reference or a low resolution reference. In these and other embodiments, a plurality of low resolution, low power ADCs having a high sampling rate may be time multiplexed together with a precision ADC at a low sampling rate.

公开(公告)号：US11002771B2

公开(公告)日：2021-05-11

申请号：US16357220

申请日：2019-03-18

Applicant: RENESAS ELECTRONICS AMERICA INC.

Inventor： Travis Guthrie ,  Narendra Kayathi

IPC: G01R19/257 ,  H03F3/217 ,  G01R19/00 ,  H03K7/08 ,  G01R19/25 ,  H02M3/157 ,  H03M1/50

Abstract: In one or more embodiments, an efficient scheme is provided for sampling inductor currents in a digital multiphase PWM controller used for high-bandwidth voltage regulation. Some embodiments use the data from the PWM modulator along with weighted states based on the PWM waveform and past conversions in order to prioritize which current sense input should be sampled for each conversion. In these and other embodiments, a single ADC is used to sample inductor currents from two or more phases in a multiphase PWM controller, thereby providing power and area savings, for example.

公开(公告)号：US11409312B1

公开(公告)日：2022-08-09

申请号：US16856758

申请日：2020-04-23

Applicant: Renesas Electronics America Inc.

Inventor： Travis Guthrie ,  Jim Toker ,  Shea Petricek

IPC: G05F1/56 ,  G06F1/26

Abstract: One or more embodiments relate to a multi-phase voltage regulator with AVP or droop configured to implement a non-linear load line. According to certain aspects, the non-linear load line can have a non-linear or zero slope in a first current/voltage region and a constant non-zero slope in second current/voltage region. In embodiments, the non-linear or zero slope region can specify that for any value of output current in that region, the output voltage will be the same predetermined value. The non-zero slope region can specify that for any value of the output current in that region, output current will be multiplied by a constant non-zero droop resistance value.

公开(公告)号：US11709513B2

公开(公告)日：2023-07-25

申请号：US17882232

申请日：2022-08-05

Applicant: Renesas Electronics America Inc.

Inventor： Travis Guthrie ,  Jim Toker ,  Shea Petricek

IPC: G05F1/56 ,  G06F1/26

CPC classification number: G05F1/56 ,  G06F1/26

Abstract: One or more embodiments relate to a multi-phase voltage regulator with AVP or droop configured to implement a non-linear load line. According to certain aspects, the non-linear load line can have a non-linear or zero slope in a first current/voltage region and a constant non-zero slope in second current/voltage region. In embodiments, the non-linear or zero slope region can specify that for any value of output current in that region, the output voltage will be the same predetermined value. The non-zero slope region can specify that for any value of the output current in that region, output current will be multiplied by a constant non-zero droop resistance value.