US 2021/0242780 A1 · METHODS AND APPARATUS TO ADJUST AN OPERATING MODE OF A POWER CONVERTER

Abstract

Methods, apparatus, systems and articles of manufacture are disclosed to adjust an operating mode of a power converter. An example apparatus includes a first transistor having a gate terminal, a first current terminal, and a second current terminal, the first current terminal to be coupled to a second transistor and an inductor of a power converter, a capacitor coupled to the second current terminal, a logic gate having a first logic gate input, a second logic gate input, and a logic gate output, the logic gate output coupled to the gate terminal, a comparator having a comparator input and a comparator output, the comparator input coupled to the capacitor and the second current terminal, a multiplexer coupled to the comparator output, a first flip-flop coupled to the multiplexer and the second logic gate input, and a second flip-flop coupled to the multiplexer and the first flip-flop.

Claims25

Dependent claims

An apparatus comprising:

a first transistor having a gate terminal, a first current terminal, and a second current terminal, the first current terminal to be coupled to a second transistor and an inductor of a power converter;
a capacitor coupled to the second current terminal;
a logic gate having a first logic gate input, a second logic gate input, and a logic gate output, the logic gate output coupled to the gate terminal;
a comparator having a comparator input and a comparator output, the comparator input coupled to the capacitor and the second current terminal;
a multiplexer coupled to the comparator output;
a first flip-flop coupled to the multiplexer and the second logic gate input;
and
a second flip-flop coupled to the multiplexer and the first flip-flop.

5 more elements

An apparatus comprising:

a control logic circuit configured to:
generate a first control signal and a second control signal, the second control signal after the first control signal;
and
adjust a first operating mode of a power converter to a second operating mode of the power converter in response to an assertion of a first logic signal;
and
a signal comparator circuit including a comparator, the signal comparator circuit coupled to the control logic circuit, the signal comparator circuit configured to:
in response to the first control signal, sample an input of the comparator and assert a second logic signal in response to the input satisfying a threshold;
and
in response to the second control signal, assert the first logic signal.

6 more elements

A power conversion system comprising:

a power converter having a load terminal, the load terminal to be coupled to a load, the power converter including a transistor having a current terminal and a gate terminal;
a switch mode control circuit coupled to the current terminal and the gate terminal, the switch mode control circuit including a comparator, the switch mode control circuit configured to:
in response to a first control signal, sample an input of the comparator;
in response to the input satisfying a threshold, assert a first logic signal;
in response to a second control signal after the first control signal, assert a second logic signal in response to the assertion of the first logic signal;
and
adjust a first operating mode of the power converter to a second operating mode of the power converter in response to the assertion of the second logic signal.

4 more elements

A method comprising:

in response to a first control signal, sampling an input of a comparator during a first low-side period, the input based on a voltage associated with a transistor coupled to a power converter;
in response to the input satisfying a threshold, asserting a first logic signal;
in response to a second control signal after the first control signal, selecting, with a multiplexer, the first logic signal to be transmitted to a flip-flop during a second low-side period after the first low-side period;
asserting, with the flip-flop, a second logic signal based on the first logic signal;
and
adjusting a first operating mode of the power converter to a second operating mode of the power converter in response to the assertion of the second logic signal.

3 more elements

Dependencies are inferred from the claim text.

Methods and apparatus to adjust an operating mode of a power converter

Life of this patent

Methods and apparatus to adjust an operating mode of a power converter

Life of this patent

Abstract

Claims25