US 2022/0069703 A1 · SEAMLESS NON-LINEAR VOLTAGE REGULATION CONTROL TO LINEAR CONTROL APPARATUS AND METHOD

Abstract

A digital control scheme controls an integrator of a PID filter to implement non-linear control of saturating the duty cycle during which the proportional and derivative terms of the PID filter are set to 0 while the integrator and its internal states (previous values or memory) is set to a duty cycle that is the sum of the current nominal duty cycle plus a deltaD. The deltaD is the maximum duty cycle increment that is used to regulate a voltage regulator from ICCmin to ICCmax and is a configuration register that can be set post silicon. An FSM moves from a non-linear all ON state to an open loop duty cycle which maintains the output voltage slightly higher than the required Vref. After a certain period in this open loop, the FSM then ramps down the open loop duty cycle value until the output voltage is close to the Vref.

Claims20

Dependent claims

An apparatus comprising:

an analog-to-digital converter to convert an analog voltage to a digital representation indicative of an error between the analog voltage and a threshold voltage;
and
a digital filter to receive the digital representation and to generate a duty cycle command, wherein the duty cycle command is to instruct a controller to adjust a duty cycle of a signal which is used to adjust the analog voltage, wherein the digital filter comprises a feedforward path and an integral path, wherein the feedforward path is coupled to the integral path via a multiplexer.

A system comprising:

a memory;
a processor coupled to the memory;
and
a wireless interface to allow the processor to communicate with another device, wherein the processor includes a voltage regulator comprising:
a low bandwidth feedback path to control regulation of an output supply voltage relative to a first reference voltage during a steady state;
a high bandwidth feedback path to control regulation of the output supply voltage when the output supply voltage crosses a second threshold, wherein the second threshold is lower than the first threshold;
and
a controller to facilitate transition from the high bandwidth feedback path to the low bandwidth feedback path via a multiplexer to bypass a feedforward path of the controller.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/009,661Filed 1 Sep 2020

Published

3 Mar 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

H02M 3/157
With automatic control of output voltage or current, e.g. switching regulators: with digital control
G06F 1/26
Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00: power supply means, e.g. regulation thereof
H02M 1/0025
Details of control, feedback or regulation circuits: arrangements for modifying reference values, feedback values or error values in the control…
H02M 3/1584
Including plural semiconductor devices as final control devices for a single load: with a plurality of power processing stages connected in parallel

Seamless non-linear voltage regulation control to linear control apparatus and method

Life of this patent

Seamless non-linear voltage regulation control to linear control apparatus and method

Life of this patent

Abstract

Claims20