US 2020/0052591 A1Published application

AVP Combined with DAC Servo

AssigneeDialog Semiconductor (UK) Limited

InventorsPietro Gallina, Vincenzo Bisogno, Mark Childs

Life of this patent

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Abstract

An object of this disclosure is to implement a Buck, Boost, or other switching converter, with a circuit to supply a reference voltage and Adaptive Voltage Positioning (AVP), by means of a servo and programmable load regulation. The reference voltage is modified, achieving a high DC gain, using a servo to remove any DC offset at the output of the switching converter. The correction implemented by the servo is measured, and a programmable fraction of the correction is injected back on either the reference voltage or the output feedback voltage. To accomplish at least one of these objects, a Buck, Boost, or other switching converter is implemented, consisting of an output stage driven by switching logic, with a servo configured between the reference voltage and the control loops of the Buck converter. The AVP function is implemented on either the reference voltage or output feedback voltage.

Claims12

Dependent claims

A switching converter, comprising:

a circuit to supply a reference voltage to said switching converter;
a servo block, having as inputs an output feedback voltage and said reference voltage;
an Adaptive Voltage Positioning (AVP) block connected at either of said inputs of said servo block, and receiving feedback from said servo block, wherein when said AVP block is configured on said reference voltage, and said servo block comprises a first transconductance (GM) stage, with non-inverting input connected to said output feedback voltage, and inverting input connected to an output of an op-amp, wherein said first GM stage has an output connected to a capacitor, and a second GM stage, said second GM stage comprising a first transistor;
control loops connected to an output of said servo block, and said output feedback voltage;
switching logic outputs of said control loops;
and
an output stage, driven by said switching logic, configured to supply the output voltage of said switching converter.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/658,743Filed 21 Oct 2019
Priority: 1 Jul 2016
Published: 13 Feb 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H02M 3/158
With automatic control of output voltage or current, e.g. switching regulators: including plural semiconductor devices as final control devices…
H02M 3/156
Using semiconductor devices only: with automatic control of output voltage or current, e.g. switching regulators
H02M 3/157
With automatic control of output voltage or current, e.g. switching regulators: with digital control
H02M 1/0025
Details of control, feedback or regulation circuits: arrangements for modifying reference values, feedback values or error values in the control…

Family

Application15/200,483Division · filed 1 Jul 2016
Application16/658,743Division
US 10,468,984 B2Related patent
US 10,811,970 B2Related patent
US 2018/0006558 A1Published application
US 2020/0052591 A1This patent

From the US filing history. Foreign family members aren’t listed.