US 2026/0229996 A1Published application

Constant on time switching converter

OwnerBenjamin M MCCUE, Ryan LIND +1inventors

InventorsBenjamin M MCCUE, Ryan LIND, Ronnie BEAN

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Abstract

A circuit includes first, second, third and fourth transistors, a buck control circuit, and a boost control circuit. The second transistor is coupled to the first transistor. The fourth transistor is coupled to the third transistor. The buck control circuit has a first output coupled to a control terminal of the first transistor, and a second output coupled to a control terminal of the second transistor. The boost control circuit includes a flip-flop, a first timer, and a second timer. The flip-flop has a first output coupled to a control terminal of the first transistor, a second output coupled to a control terminal of the second transistor, and an input. The first timer has an output coupled to the input of the flip-flop. The second timer has an output coupled to the input of the flip-flop.

Claims20

Dependent claims

A circuit comprising:

a first transistor having a first terminal, a second terminal, and a control terminal;
a second transistor having a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to a reference terminal, and a control terminal;
a third transistor having a first terminal, a second terminal, and a control terminal;
a fourth transistor having a first terminal coupled to the second terminal of the third transistor, a second terminal coupled to the reference terminal, and a control terminal;
a first control circuit having a first output coupled to the control terminal of the first transistor, and a second output coupled to the control terminal of the second transistor;
a second control circuit including:
a flip-flop having a first output coupled to the control terminal of the third transistor, a second output coupled to the control terminal of the fourth transistor, and an input;
a first timer having an output coupled to the input of the flip-flop;
and
a second timer having an output coupled to the input of the flip-flop.

7 more elements

An apparatus, comprising:

a first transistor having a first terminal, a second terminal, and a control terminal;
a second transistor having a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to a reference terminal, and a control terminal;
a third transistor having a first terminal, a second terminal, and a control terminal;
a fourth transistor having a first terminal coupled to the second terminal of the third transistor, a second terminal coupled to the reference terminal, and a control terminal;
a buck control circuit having a first output coupled to the control terminal of the first transistor, and a second output coupled to the control terminal of the second transistor;
a boost control circuit having a first output coupled to the control terminal of the third transistor, and a second output coupled to the control terminal of the fourth transistor, the boost control circuit including:
a first timer configured to turn off the fourth transistor responsive to the apparatus operating in a boost mode;
and
a second timer configured to turn off the fourth transistor responsive to the apparatus operating in a buck-boost mode.

6 more elements

A system, comprising:

an input terminal configured to receive an input voltage;
an output terminal configured to provide an output voltage;
a first transistor having a first terminal coupled to the input terminal, a second terminal, and a control terminal;
a second transistor having a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to a reference terminal, and a control terminal;
a third transistor having a first terminal coupled to the output terminal, a second terminal, and a control terminal;
a fourth transistor having a first terminal coupled to the second terminal of the third transistor, a second terminal coupled to the reference terminal, and a control terminal;
an inductor having a first terminal coupled to the first terminal of the second transistor, and a second terminal coupled to the first terminal of the fourth transistor;
a buck control circuit having a first output coupled to the control terminal of the first transistor, and a second output coupled to the control terminal of the second transistor, the buck control circuit including a first timer configured to turn off the first transistor responsive to the system operating in a buck mode or a buck-boost mode;
and
a boost control circuit having a first output coupled to the control terminal of the third transistor, and a second output coupled to the control terminal of the fourth transistor, the boost control circuit including:
a second timer configured to turn off the fourth transistor responsive to the system operating in a boost mode;
and
a third timer configured to turn off the fourth transistor responsive to the system operating in a buck-boost mode.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/043,437Filed 1 Feb 2025
Published: 6 Aug 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 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
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…

Family

No related US applications are recorded in the indexed filing history.

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