US 9,791,883 B2 · Switching converter to operate in pulse width modulation mode or pulse skipping mode

Abstract

An electronic device disclosed herein includes a current comparator to generate an output current based upon a difference between a current flowing in an output branch and a current flowing in an input branch. A pair of transistors is coupled to an output of the current comparator. A first amplifier has inputs coupled to the pair of transistors and to a reference voltage, the first amplifier being configured to subtract the reference voltage from a voltage across the pair of transistors and output a difference voltage. A second amplifier has inputs coupled to the difference voltage and to the reference voltage, the second amplifier being configured to subtract the difference voltage from the reference voltage and output a pulse skipping mode reference signal.

Claims20

Dependent claims

An electronic device, comprising:

a current comparator configured to generate an output current based upon a difference between a current flowing in an output branch and a current flowing in an input branch;
a pair of transistors coupled to an output of the current comparator;
a first amplifier having inputs coupled to the pair of transistors and to a reference voltage, the first amplifier configured to subtract the reference voltage from a voltage across the pair of transistors and output a difference voltage;
and
a second amplifier having inputs coupled to the difference voltage and to the reference voltage, the second amplifier configured to subtract the difference voltage from the reference voltage and output a pulse skipping mode reference signal.

2 more elements

An electronic device, comprising:

a current comparator configured to compare an input current to an output current and to generate a difference current therefrom;
a current to voltage converter circuit configured to convert the difference current to a converted voltage;
a first amplifier configured to subtract a reference voltage from the converted voltage and to output a difference voltage representing a result thereof;
a second amplifier configured to subtract the difference voltage from the reference voltage and output a pulse skipping mode reference signal.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/218,605Filed 25 Jul 2016 · continuation

Priority

CN 2014 1 053758311 Oct 2014

Published

US 2016/0103463 A117 Nov 2016

Granted

17 Oct 2017

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

G05F 3/262
Current mirrors: using field-effect transistors only
H02M 1/08
Details of apparatus for conversion: circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in…
H02M 3/158
With automatic control of output voltage or current, e.g. switching regulators: including plural semiconductor devices as final control devices…
H02M 1/0032
Details of control, feedback or regulation circuits: control circuits allowing low power mode operation, e.g. in standby mode

Family

Application14/531,314Parent of this continuation · filed 3 Nov 2014

US 2016/0334828 A1Pre-grant publication · published 17 Nov 2016

US 9,423,816 B2Parent of this continuation

US 2016/0103463 A1Published application

US 9,791,883 B2This patent

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

Switching converter to operate in pulse width modulation mode or pulse skipping mode

Life of this patent

Switching converter to operate in pulse width modulation mode or pulse skipping mode

Life of this patent

Abstract

Claims20