Power converter with reduced power consumption in standby mode

Patent metadata

Field	Value
Publication number	US-9602018-B2
Application number	US-201213424609-A
Country	US
Kind code	B2
Filing date	Mar 20, 2012
Priority date	Mar 20, 2012
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

In accordance with various embodiments a converter is provided, including: a transformer comprising a primary side and a secondary side; a primary side circuit arrangement coupled to the primary side of the transformer; a secondary side circuit arrangement coupled to the secondary side of the transformer, wherein the secondary side circuit arrangement is configured to provide at least one of an output voltage and an output current; a coupling component configured to provide information about at least one of the output voltage and the output current to the primary side circuit arrangement; a first energy supply configured to provide the coupling component with a first current; and second energy supply configured to provide the coupling component with a second current, wherein the second current is lower than the first current.

First claim

What is claimed is:

1. A converter comprising:
a transformer comprising a primary side and a secondary side;
a primary side circuit arrangement coupled to the primary side of the transformer;
a secondary side circuit arrangement coupled to the secondary side of the transformer, wherein the secondary side circuit arrangement is configured to provide at least one of an output voltage and an output current;
a coupling component configured to provide information about at least one of the output voltage and the output current to the primary side circuit arrangement and configured to operate in a first mode and a second mode, the coupling component comprising a first side and a second side which are galvanically decoupled from one another;
the primary side circuit arrangement comprising a first energy supply source configured to provide the coupling component with a first current; and
the primary side circuit arrangement further comprising a second energy supply source configured to provide the coupling component with a second current,
wherein the second current is lower than the first current,
wherein in the first mode the first energy source and the second energy source are configured to provide energy to the first side of the coupling component, and
wherein in the second mode only the second energy source is configured to provide energy to the first side of the coupling component.

2. The converter of claim 1 ,
wherein the primary side circuit arrangement comprises a controller configured to provide the at least one switch control signal to the at least one switch.

3. The converter of claim 1 ,
wherein the first side of the coupling component is coupled to the primary side circuit arrangement.

4. The converter of claim 1 ,
wherein the second side of the coupling component is coupled to the secondary side circuit arrangement.

5. The converter of claim 1 ,
wherein the information about at least one of the output voltage and the output current corresponds to an amplitude of a signal generated by the first side of the coupling component.

6. The converter of claim 1 ,
wherein the information about at least one of the output voltage and the output current corresponds to a frequency of pulses generated by the first side of the coupling component.

7. The converter of claim 1 ,
wherein the primary side circuit arrangement comprises a controller configured to provide the at least one switch control signal to the at least one switch; and
wherein during the operation of the coupling component in the first mode the controller is configured to adjust a current flow through the primary side of the transformer in accordance with the signal generated by the first side of the coupling component.

8. The converter of claim 1 , wherein the coupling component comprises an optocoupler.

9. The converter of claim 2 ,
wherein the coupling component is configured to operate in the first mode when the controller is activated.

10. The converter of claim 2 ,
wherein the primary side circuit arrangement is configured to deactivate the first energy supply source when the controller is deactivated.

11. The converter of claim 2 ,
wherein the controller comprises the first energy supply source.

12. The converter of claim 5 ,
wherein the primary side circuit arrangement comprises a controller configured to provide the at least one switch control signal to the at least one switch; and
wherein the primary side circuit arrangement is configured to deactivate the controller when the signal amplitude exceeds a first threshold value.

13. The converter of claim 5 ,
wherein the primary side circuit arrangement comprises a controller configured to provide the at least one switch control signal to the at least one switch; and
wherein the primary side circuit arrangement is configured to deactivate the controller when the signal amplitude has remained above a predefined value for a predefined period of time.

14. The converter of claim 5 ,
wherein the coupling component is configured to be operated in the first mode after the signal amplitude drops below a second threshold value during the operation of the coupling component in the second mode.

15. The converter of claim 12 ,
wherein the coupling component is configured to operate in the second mode after the signal amplitude has exceeded the first threshold value.

16. The converter of claim 13 ,
wherein the coupling component is configured to operate in the second mode after the signal amplitude has remained above the predefined value for the predefined period of time.

17. A converter comprising:
a transformer comprising a first side and a second side;
a first circuit coupled to the first side of the transformer;
a second circuit coupled to the second side of the transformer, wherein the second circuit is configured to provide an output voltage;
a transmitter configured to provide information about the output voltage to the first circuit and configured to operate in a first mode and a second mode, the transmitter comprising a receiving side and a sending side which are galvanically decoupled from one another;
the first circuit comprising a first energy supply source configured to provide the transmitter with a first current; and
the first circuit further comprising a second energy supply source configured to provide the transmitter with a second current, wherein the second current is different from the first current,
wherein in the first mode the first energy supply source and the second energy supply source are configured to provide energy to the receiving side of the transmitter, and wherein in the second mode only the second energy source is configured to provide energy to the receiving side of the transmitter.

18. The converter of claim 17 ,
wherein the first circuit comprises a controller configured to provide the at least one switch control signal to the at least one switch; and
wherein during the operation of the transmitter in the first mode the controller is configured to adjust a current flow through the first side of the transformer in accordance with the amplitude of a signal generated by the receiving side of the transmitter.

19. The converter of claim 17 , wherein the transmitter comprises an optocoupler.

20. A converter comprising:
a transformer comprising a primary side and a secondary side;
a primary side circuit arrangement coupled to the primary side of the transformer;
a secondary side circuit arrangement coupled to the secondary side of the transformer, wherein the secondary side circuit arrangement is configured to provide at least one of an output voltage and an output current;
a coupling component configured to provide information about at least one of the output voltage and the output current to the primary side circuit arrangement and configured to operate in a first mode and a second mode, the coupling component comprising a first side and a second side which are galvanically decoupled from one another;
a first energy supply source configured to provide the coupling component with a first current; and
a second energy supply source configured to provide the coupling component with a second current, wherein the second current is lower than the first current, wherein in the first mode the first energy source and the second energy source are configured to provide energy to the first side of the coupling component, and wherein in the second mode only the second energy source is configured to provide energy to the first side of

Assignees

• Herfurth Michael
• Infineon Technologies Austria Ag

Inventors

• Herfurth Michael

Classifications

• Y02B70/1433

  Cross-Sectional Technologies · mapped topic

• H02M3/335

  using semiconductor devices only · CPC title

• H02M3/33507

  with automatic control of the output voltage or current, e.g. flyback converters (H02M3/33561, H02M3/33569 take precedence) · CPC title

• Y02B70/16

  Cross-Sectional Technologies · mapped topic

• H02M3/3376 Primary

  with automatic control of output voltage or current · CPC title