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US 11,239,747 B2Granted
Current sensing apparatus in power factor correction circuits and related methods
AssigneeTexas Instruments Incorporated
InventorSerkan Dusmez
Life of this patent
Estimating the term…
Abstract
Current sensing apparatus in power factor correction circuits and related methods are disclosed. An example power factor correction circuit includes a first Gallium Nitride (GaN) transistor having a first current terminal and a second current terminal, a second GaN transistor having a third current terminal and a fourth current terminal, a first diode having a first anode, a second diode having a second anode, the second anode coupled to the first anode, and a resistor having a first terminal and a second terminal, the first terminal coupled to the second current terminal and the fourth current terminal, the second terminal coupled to the first anode and the second anode.
Claims17
A power supply circuit comprising:
- a first Gallium Nitride (GaN) transistor having a first current terminal and a second current terminal;
- a second GaN transistor having a third current terminal and a fourth current terminal, the fourth current terminal coupled to the second current terminal;
- a first diode having a first anode and a first cathode;
- a second diode having a second anode and a second cathode, the second anode coupled to the first anode;
- and
- a first resistor having a first resistor terminal and a second resistor terminal, the first resistor terminal coupled to the second current terminal and to the fourth current terminal, the second resistor terminal coupled to the first anode and to the second anode;
- a third diode having a third anode and a third cathode, the third anode coupled to the first current terminal;
- a fourth diode having a fourth anode and a fourth cathode, the fourth anode coupled to the third current terminal and the fourth cathode coupled to the third cathode;
- a second resistor having a third resistor terminal and a fourth resistor terminal, the third resistor terminal coupled to the third cathode and the fourth cathode;
- a third resistor having a fifth resistor terminal and a sixth resistor terminal, the fifth resistor terminal coupled to the fourth resistor terminal and the fourth resistor terminal coupled to the fourth current terminal, the second current terminal, and the first resistor terminal;
- and
- a controller having a current sense input and a voltage sense input, the current sense input coupled to the second resistor terminal and the voltage sense input coupled to the fourth resistor terminal.
9 more elements
A power factor correction circuit comprising:
- a first Gallium Nitride (GaN) transistor having a first current terminal and a second current terminal;
- a second GaN transistor having a third current terminal and a fourth current terminal, the fourth current terminal coupled to the second current terminal;
- a diode having an anode;
- a resistor having a first resistor terminal and a second resistor terminal, the first resistor terminal coupled to the second current terminal and to the fourth current terminal, the second resistor terminal coupled to the anode;
- and
- a controller coupled to the second resistor terminal and to the anode, the controller configured to:
- measure a first voltage that corresponds to a first current flowing through the resistor and the diode, the first current having a first value in response to the controller turning on the first GaN transistor;
- and
- measure a second voltage that corresponds to a second current flowing through the resistor and the diode, the second current having a second value in response to the controller turning off the first GaN transistor, the second value greater than the first value.
6 more elements
A power conversion system comprising:
- a power converter;
- a power factor correction circuit coupled to the power converter, the power factor correction circuit comprising:
- a first Gallium Nitride (GaN) transistor having a first current terminal and a second current terminal;
- a second GaN transistor having a third current terminal and a fourth current terminal;
- a first diode having a first anode and a first cathode;
- a second diode having a second anode and a second cathode, the second anode coupled to the first anode and the second cathode coupled to the first cathode;
- and
- a resistor having a first resistor terminal and a second resistor terminal, the first resistor terminal coupled to the second current terminal and to the fourth current terminal, the second resistor terminal coupled to the first anode and to the second anode;
- and
- a controller coupled to the power factor correction circuit, the controller configured to:
- receive an input current of the power conversion system using the resistor;
- receive an input voltage of the power conversion system;
- and
- control the first GaN transistor and the second GaN transistor based on the input current and the input voltage.
11 more elements
Dependencies are inferred from the claim text.