US 11,464,093 B2 · Single power phase buck and boost converters

Abstract

In examples, an apparatus includes a transistor, a switch, a diode, a capacitor, a voltage divider, a second transistor, a resistor, and a controller. The transistor has a transistor drain, a transistor source, and a transistor gate. The switch is adapted to couple a power supply to the transistor drain through an inductor. The diode has a cathode and an anode, the diode cathode coupled to the transistor drain. The capacitor is coupled between the diode anode and ground. The voltage divider is coupled between the diode anode and ground and having a voltage divider output. The second transistor has a second transistor source and a second transistor gate. The resistor is coupled between the diode anode and the second transistor source. The controller is coupled to the transistor gate, the transistor source, the voltage divider output, the diode anode, the second transistor gate, and the second transistor source.

Claims17

Dependent claims

An apparatus, comprising:

a first transistor having a first transistor drain, a first transistor source, and a first transistor gate;
a switch adapted to couple a power supply to the first transistor drain through an inductor;
a diode having a diode cathode and a diode anode, the diode cathode coupled to the first transistor drain;
a capacitor coupled between the diode anode and ground;
a voltage divider coupled between the diode anode and ground and having a voltage divider output;
a second transistor having a second transistor source and a second transistor gate;
a resistor coupled between the diode anode and the second transistor source;
a controller coupled to the first transistor gate, the first transistor source, the voltage divider output, the diode anode, the second transistor gate, and the second transistor source;
and
a third transistor having a third transistor drain, a third transistor source, and a third transistor gate, the third transistor drain coupled to the first transistor drain, the third transistor source coupled to the controller, and the third transistor gate coupled to the controller.

7 more elements

A system, comprising:

a camera;
an infrared (IR) light emitting diode (LED);
a driver coupled to the IR LED;
and
a first controller coupled to the camera and the driver and configured to provide a control signal to the camera and the driver to cause the driver to cause the IR LED to emit IR light while the camera captures an image, the driver comprising:
a first transistor having a first transistor drain, a first transistor source, and a first transistor gate, the first transistor drain adapted to be coupled to an inductor;
a diode having a diode cathode and a diode anode, the diode cathode coupled to the first transistor drain;
a capacitor coupled between the diode anode and ground;
a voltage divider coupled between the diode anode and ground and having a voltage divider output;
a second transistor having a second transistor source, and a second transistor gate;
a resistor coupled between the diode anode and the second transistor source;
a second controller coupled to the first transistor gate, the first transistor source, the voltage divider output, the diode anode, the second transistor gate, and the second transistor source;
and
a third transistor having a third transistor drain, a third transistor source, and a third transistor gate, the third transistor drain coupled to the first transistor drain, the third transistor source coupled to the controller, and the third transistor gate coupled to the second controller.

11 more elements

Dependencies are inferred from the claim text.

Single power phase buck and boost converters

Life of this patent

Single power phase buck and boost converters

Life of this patent

Abstract

Claims17