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US 11,641,162 B2Granted
Circuits and methods for generating a supply voltage for a switching regulator
AssigneeTexas Instruments Incorporated
InventorSalvatore Giombanco
Life of this patent
Estimating the term…
Abstract
Circuits and methods for converting a current to an output voltage are disclosed herein. An embodiment of the circuit includes a first switch connected between a source of current and a first node and a second switch connected between the first node and a common voltage. The circuit also includes a first controller for controlling the state of the first switch and a second controller for controlling the state of the second switch. A capacitor is coupled to the first node; the voltage on the capacitor is the output voltage. When the second switch is open, the capacitor charges, and when the second switch is closed, the capacitor does not charge. The current flows through the primary inductance of a transformer.
Claims27
A circuit comprising:
- a first transistor having a first gate, a first current terminal, and a second current terminal, the first current terminal coupled to a first power terminal;
- a first switch coupled between the second current terminal and a second power terminal;
- a second transistor having a second gate, a third current terminal, and a fourth current terminal, the third current terminal coupled to the second current terminal, and the fourth current terminal coupled to a third power terminal;
- a second switch coupled between the second power terminal and the first gate;
- and
- a controller having a control input, a first switch control output, a second switch control output, and a gate control output, the control input coupled to the second power terminal, the first switch control output coupled to the first switch, the second switch control output coupled to the second switch, the gate control output coupled to the second gate, and the controller configured to, after a voltage at the second power terminal equals a threshold voltage:
- open the first and second switches;
- and
- provide a signal at the gate control output, in which the second transistor is configured to turn on responsive to the signal, and the first transistor is configured to turn off responsive to the signal.
6 more elements
A circuit comprising:
- a first transistor having a first gate, a first current terminal, and a second current terminal, the first current terminal coupled to a first power terminal;
- a diode having an anode and a cathode, the anode coupled to the second current terminal, and the cathode coupled to a second power terminal;
- a second transistor having a second gate, a third current terminal, and a fourth current terminal, the third current terminal coupled to the second current terminal, and the fourth current terminal coupled to a third power terminal;
- a switch coupled between the first gate and the second power terminal;
- and
- a controller having a control input, a switch control output, and a gate control output, the control input coupled to the second power terminal, the switch control output coupled to the switch, the gate control output coupled to the second gate, and the controller configured to, after a voltage at the second power terminal equals a threshold voltage:
- open the switch;
- and
- provide a signal at the gate control output, in which the second transistor is configured to turn on responsive to the signal, and the first transistor is configured to turn off responsive to the signal.
6 more elements
A circuit comprising:
- a first transistor having a first gate, a first current terminal, and a second current terminal, the first current terminal coupled to a first power terminal, and the second current terminal coupled to a second power terminal;
- a switch coupled between the second power terminal and the first gate;
- a second transistor having a second gate, a third current terminal, and a fourth current terminal, the third current terminal coupled to the second current terminal, and the fourth current terminal coupled to a third power terminal;
- and
- a controller having a control input, a switch control output, and a gate control output, the control input coupled to the second power terminal, the switch control output coupled to the switch, the gate control output coupled to the second gate, and the controller configured to, after a voltage at the second power terminal equals a threshold voltage:
- open the switch;
- and
- provide a signal at the gate control output, in which the second transistor is configured to turn on responsive to the signal, and the first transistor is configured to turn off responsive to the signal.
5 more elements
Dependencies are inferred from the claim text.