Circuit configuration for applying a supply voltage to a load and method for such application
AssigneeInfineon Technologies AG
InventorMartin Feldtkeller
Life of this patent
Estimating the term…
Abstract
A circuit configuration for pulsed application of a first supply voltage to a load includes a first switch, connected in series with the load, a first control connector, a control circuit for control of the first switch and having a first output terminal connected to the control connector of the first switch and first and second voltage supply terminals, a second switch connected between the load and the first voltage supply terminal of the control circuit and having a second control connector to which a control signal is supplied. The invention also includes a method for actuating the first and second switches and use of the inventive circuit configuration in a switched-mode power supply or a power factor controller.
Claims25
A circuit configuration for clocked application of a supply voltage to a load, the circuit configuration comprising:
- a first switch having a first control connection, said first switch connected in series with the load;
- a control circuit connected to said first switch, said control circuit having:
- a first output terminal connected to said first control connection for actuating said first switch;
- and
- first and second voltage supply terminals;
- and
- a second switch having a second control connection to which an actuation signal is supplied, said second switch and said control circuit forming a series circuit, said series circuit being connected in parallel with said first switch, said second switch connected between the load and said first voltage supply terminal.
A switched-mode power supply for applying a supply voltage to a load, the power supply comprising:
- a first switch having a first control connection, said first switch being an IGBT connected in series with the load;
- a control circuit connected to said first switch, said control circuit having:
- a first output terminal connected to said first control connection for actuating said first switch;
- and
- first and second voltage supply terminals;
- a second switch having a second control connection to which an actuation signal is supplied, said second switch and said control circuit forming a series circuit, said series circuit being connected in parallel with said first switch, said second switch being a MOSFET connected between the load and said first voltage supply terminal;
- and
- said first and second switches being semiconductor switches selected from the group consisting of FETs and IGBTs.
In a power factor controller applying a supply voltage to an inductor through which an input current flows, a circuit configuration comprising:
- a first switch having a first control connection, said first switch connected in series with the inductor;
- a control circuit connected to said first switch, said control circuit having:
- a first output terminal connected to said first control connection for actuating said first switch;
- and
- first and second voltage supply terminals;
- and
- a second switch having a second control connection to which an actuation signal is supplied, said second switch and said control circuit forming a series circuit, said series circuit being connected in parallel with said first switch, said second switch connected between the inductor and said first voltage supply terminal.
A method for applying a supply voltage to a load, which comprises:
- connecting a first switch in series with the load, the first switch having a first control connection;
- connecting a control circuit to the first switch, the control circuit having:
- a first output terminal;
- and
- first and second voltage supply terminals;
- connecting the first output terminal to the first control connection for actuating the first switch;
- connecting a second switch between the load and the first voltage supply terminal, the second switch having a second control connection;
- supplying an actuation signal to the second control connection;
- and
- actuating the first and second switches by:
- turning on the first and second switches at least approximately at the same time;
- and
- turning off the first and second switches at different times.
A method for applying a supply voltage to a load, which comprises:
- connecting a first switch in series with the load, the first switch having a first control connection;
- connecting a control circuit to the first switch, the control circuit having:
- a first output terminal;
- and
- first and second voltage supply terminals;
- connecting the first output terminal to the first control connection for actuating the first switch;
- connecting a second switch between the load and the first voltage supply terminal, the second switch having a second control connection;
- supplying an actuation signal to the second control connection;
- and
- actuating the first and second switches by:
- turning on the second switch one of before and at approximately the same time as the first switch is turned off;
- and
- turning off the second switch after the first switch has been turned off.
In a switched-mode power supply applying a supply voltage to a primary coil of a transformer, a circuit configuration comprising:
- a first switch having a first control connection, said first switch connected in series with the primary coil;
- a control circuit connected to said first switch, said control circuit having:
- a first output terminal connected to said first control connection for actuating said first switch;
- and
- first and second voltage supply terminals;
- and
- a second switch having a second control connection to which an actuation signal is supplied, said second switch and said control circuit forming a series circuit, said series circuit being connected in parallel with said first switch, said second switch connected between the primary coil and said first voltage supply terminal.
Dependencies are inferred from the claim text.