US 2022/0069708 A1 · Mode-transition Architecture for Buck-boost converter

Abstract

A mode-transition architecture for USB controllers is described herein. In an example embodiment, an integrated circuit (IC) controller includes a controller coupled to a slope compensation circuit, the controller to detect a transition of a buck-boost converter from a first mode having a first duty cycle to a second mode having a second duty cycle that is less or more than the first duty cycle. The controller controls the slope compensation circuit to nullify an error in an output caused by the transition. The controller can cause the slope compensation circuit to apply a charge stored in a capacitor during a first cycle to start a second cycle with a higher voltage than the first cycle.

Claims20

Dependent claims

A method comprising:

detecting, by a USB controller, a transition of a buck-boost converter from a first mode having a first duty cycle to a second mode having a second duty cycle that is less than the first duty cycle;
providing, by a slope compensation circuit of the USB controller, an output based on an input current of the buck-boost converter and a slope compensation current, the output comprising an error caused by the transition;
and
controlling, by the USB controller, an offset output by the slope compensation circuit to nullify the error caused by the transition.

1 more element

An integrated circuit (IC) controller for a Universal Serial Bus (USB) Type-C device, the IC controller comprising:

a current sense amplifier (CSA) to measure an input current of a buck-boost converter;
a slope compensation circuit coupled to an output of the CSA, the slope compensation circuit to add an offset to the output of the CSA when enabled;
and
a controller coupled to the slope compensation circuit, wherein the controller is operable to:
detect a transition of the buck-boost converter from a first mode having a first duty cycle to a second mode having a second duty cycle that is less than the first duty cycle;
and
control the offset output by the slope compensation circuit to nullify an error in the output of the CSA caused by the transition.

4 more elements

A Universal Serial Bus (USB) device comprising:

a buck-boost converter comprising an input terminal and an output terminal;
a USB Type-C connector comprising a VBUS line;
and
an integrated circuit (IC) controller comprising:
a VBUS terminal coupled to the VBUS line of the USB Type-C connector and the output terminal of the buck-boost converter;
a current sense amplifier (CSA) to measure an input current at the input terminal;
a slope compensation circuit coupled to an output of the CSA, the slope compensation circuit to add an offset to the output of the CSA when enabled;
and
a controller coupled to the slope compensation circuit, wherein the controller is operable to:
detect a transition of the buck-boost converter from a first mode having a first duty cycle to a second mode having a second duty cycle that is less than the first duty cycle;
and
control the slope compensation circuit to nullify an error in the output caused by the transition.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/147,686Filed 13 Jan 2021

Priority

3 Sep 2020

Published

3 Mar 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

H02M 3/1582
Including plural semiconductor devices as final control devices for a single load: buck-boost converters
H02M 1/0003
Details of apparatus for conversion: details of control, feedback or regulation circuits
G01R 19/16552
In AC or DC supplies: in I.C. power supplies
G06F 1/266
Power supply means, e.g. regulation thereof: arrangements to supply power to external peripherals either directly from the computer or under…

Mode-transition Architecture for Buck-boost converter

Life of this patent

Mode-transition Architecture for Buck-boost converter

Life of this patent

Abstract

Claims20