公开(公告)号：US20200083794A1

公开(公告)日：2020-03-12

申请号：US16428094

申请日：2019-05-31

Applicant: Microchip Technology Incorporated

Inventor： Santosh Manjunath Bhandarkar ,  Alex Dumais

IPC: H02M1/08 ,  H02M3/157 ,  H03K5/24

Abstract: Adaptive slope compensation for current mode control in a switch mode power supply converter is computed for every switching cycle based upon the input voltage and duty-cycle whereby the quality factor is maintained at a constant value. A digital signal processing (DSP) capable microcontroller comprises a voltage loop compensator and generates a desired current reference for every switching cycle. Slope calculations are adapted for switching frequency, inductance value, current circuit gain, etc. The slope calculation result is applied to a pulse-digital-modulation (PDM) digital-to-analog converter (DAC) capable of changing its output levels at a very fast rate compared to the power supply switching frequency whereby the required current slope is provided within the switching period. Actual inductor current may be used to compare against the slope reference, thereby taking care of changes in the inductance values under load. The slope levels are automatically changed when the switching frequency is changed.

公开(公告)号：US20190199204A1

公开(公告)日：2019-06-27

申请号：US16165384

申请日：2018-10-19

Applicant: Microchip Technology Incorporated

Inventor： Santosh Manjunath Bhandarkar ,  Alex Dumais

IPC: H02M1/42 ,  H02M7/217

CPC classification number: H02M1/4225 ,  G05F1/565 ,  H02M1/083 ,  H02M1/143 ,  H02M3/1563 ,  H02M3/157 ,  H02M7/217 ,  H02M2001/0019 ,  H02M2001/0022 ,  H02M2001/0032 ,  H02M2001/0058 ,  H02M2003/1566

Abstract: A circuit arrangement for switched boundary mode power conversion, a corresponding signal processor and a method of switched boundary mode power conversion are provided. The circuit arrangement comprises an input for receiving an input voltage from a power supply, an output to provide an output voltage to a load, an energy storage device, a controllable switching device, and a signal processor. The signal processor is connected to the controllable switching device and being configured for zero-current switching of the switching device. The signal processor is further configured to determine an on-time period for the switching device in one or more switching cycles based on the output voltage and the output of a crossover frequency control module to provide an improved transient response characteristic of the circuit arrangement.