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US 12,640,658 B2Granted
Bi-directional communication scheme between primary and secondary for fly-back AC-DC converters
AssigneeInfineon Technologies Americas Corp.
InventorsRajesh Karri, Arun Khamesra
Life of this patent
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Abstract
An USB-PD power converter with primary and secondary side controllers that bidirectionally communicate with each other. In one embodiment, the USB-PD power converter has a first transformer in data communication with the primary-side controller and the secondary-side controller. The secondary-side controller is configured to generate control signals and receive acknowledgement signals from the primary-side controller via the first transformer. The primary-side controller is configured to generate the acknowledgment signals and receive the control signals from the secondary-side controller via the first transformer.
Claims19
A method for a secondary-side controlled Universal Serial Bus Power Delivery (USB-PD) converter, the method comprising:
- a secondary-side controller, of the USB-PD converter, generating a first control signal;
- a primary-side controller, of the USB-PD converter, receiving the first control signal via a first transformer of the USB-PD converter;
- the primary-side controller activating or deactivating a first primary-side switch coupled to a primary winding of a second transformer of the USB-PD converter in response to the primary-side controller receiving the first control signal via the first transformer;
- the primary-side controller generating a first acknowledgement signal in response to the generating a first signal for activating or deactivating the first primary-side switch;
- the secondary-side controller receiving the first acknowledgement signal via the first transformer,
- wherein the primary-side controller comprises an acknowledgement generator including gate drivers that drive first and second switches connected in series between a supply voltage and a primary-side ground, the acknowledgement generator being configured to produce distinct high-voltage and low-voltage pulse acknowledgements across the first transformer by opening and closing the first and second switches.
3 more elements
A Universal Serial Bus Power Delivery (UDB-PD) power converter comprising:
- a pulse transformer;
- a secondary-side controller in data communication with the pulse transformer;
- a primary-side controller in data communication with the pulse transformer;
- wherein the secondary-side controller is configured to generate control signals;
- wherein the secondary-side controller is configured to receive acknowledgement signals from the primary-side controller via the pulse transformer;
- wherein the primary-side controller is configured to generate the acknowledgment signals;
- wherein the primary-side controller is configured receive the control signals from the secondary-side controller via the pulse transformer,
- wherein the primary-side controller generates an acknowledgement signal in response to generating a first signal for activating or deactivating a first primary-side switch;
- and wherein the primary-side controller comprises an acknowledgement generator including gate drivers that drive first and second switches connected in series between a supply voltage and a primary-side ground, the acknowledgement generator being configured to produce distinct high-voltage and low-voltage pulse acknowledgements across the pulse transformer by opening and closing the first and second switches.
6 more elements
A Universal Serial Bus Power Delivery (USB-PD) power adapter comprising:
- a USB-C port;
- a flyback transformer coupled to the USB-C port;
- a pulse transformer;
- a primary-side controller coupled to the pulse transformer and configured to control operation of the flyback transformer;
- and
- a secondary-side controller coupled to the USB-C port and to the pulse transformer, the secondary-side controller configured for data communication with the primary-side controller in the USB-PD power adapter via the pulse transformer;
- wherein the secondary-side controller is configured to generate control signals for indirectly controlling switches connected to a primary winding of the flyback transformer;
- wherein the secondary-side controller is configured to receive acknowledgement signals from the primary-side controller via the pulse transformer;
- wherein the secondary-side controller is configured to control a secondary-side switch connected to a secondary winding of the flyback transformer based on acknowledgment signals received from the primary-side controller via the pulse transformer
- wherein the primary-side controller generates an acknowledgement signal in response to generating a first signal for activating or deactivating a first primary-side switch;
- and wherein the primary-side controller comprises an acknowledgement generator including gate drivers that drive first and second switches connected in series between a supply voltage and a primary-side ground, the acknowledgement generator being configured to produce distinct high-voltage and low-voltage pulse acknowledgements across the pulse transformer by opening and closing the first and second switches.
8 more elements
Dependencies are inferred from the claim text.