Power delivery device, AC adapter, AC charger, electronic apparatus and power delivery system

Patent metadata

Field	Value
Publication number	US-10333409-B2
Application number	US-201715809166-A
Country	US
Kind code	B2
Filing date	Nov 10, 2017
Priority date	May 14, 2015
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A PD device comprises: a DC/DC converter disposed between an input and a VBUS output; a primary-side controller configured to control an input current of the DC/DC converter; and a bidirectional insulation circuit coupled to a control input, the bidirectional insulation circuit configured to receive a control input signal of the control input, and then feed back the received control input signal to the primary-side controller. The primary-side controller varies an output voltage value and an available output current value of the DC/DC converter by controlling the input current of the DC/DC converter on the basis of the control input signal fed back from the bidirectional insulation circuit. There are provided a PD device in which mounting space is reduced, and thereby capable of achieving miniaturization and cost reduction, and capable of controlling the output voltage value and the available output current value (MAX value).

First claim

What is claimed is:

1. A power delivery device comprising:
a DC/DC converter disposed between an input and a VBUS output;
a primary-side controller configured to control an input current of the DC/DC converter;
a bidirectional insulation circuit coupled to a control input, the bidirectional insulation circuit configured to receive a control input signal of the control input, and to feed the received control input signal back to the primary-side controller, the control input independent from the VBUS output;
a switch disposed between an output of the DC/DC converter and the VBUS output, the switch SW configured to interrupt the output of the DC/DC converter, wherein the switch is not a component configuring the DC/DC converter;
a secondary-side controller connected to the bidirectional insulation circuit, the secondary-side controller configured to execute on/off control of the switch; and
a power output circuit connected to the primary-side controller, the power output circuit configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs, wherein
the primary-side controller varies an output voltage value and an available output current value of the DC/DC converter by controlling the input current on the basis of the control input signal fed back from the bidirectional insulation circuit;
the bidirectional insulation circuit is coupled to a plurality of control inputs, and is structured execute signal conversion and switching of control input signals of the plurality of the control inputs.

2. The power delivery device according to claim 1 , further comprising
an output capacitor configured to couple the secondary-side controller and the VBUS output to each other.

3. The power delivery device according to claim 1 , further comprising
an AC coupling capacitor configured to couple the bidirectional insulation circuit and the control input.

4. The power delivery device according to claim 1 , wherein
the bidirectional insulation circuit comprises a plurality of unidirectional insulation circuits.

5. The power delivery device according to claim 4 , wherein the bidirectional insulation circuit comprises
a first unidirectional insulation circuit structured to provide DC coupling and provide AC coupling, and
a second unidirectional insulation circuit structured to provide AC coupling.

6. The power delivery device according to claim 1 , wherein
the bidirectional insulation circuit is further structured to execute a signal conversion of an AC signal component of the VBUS output.

7. The power delivery device according to claim 1 , wherein the power output circuit comprises a plurality of DC/DC converters.

8. The power delivery device according to claim 1 , wherein the bidirectional insulation circuit comprises:
a protocol conversion unit configured to execute a frequency conversion, and
a communication circuit disposed between the protocol conversion unit and the control input, the communication circuit configured to execute a code conversion.

9. The power delivery device according to claim 1 , wherein
the bidirectional insulation circuit comprises a switch configured to select between the secondary-side controller and the control input.

10. The power delivery device according to claim 1 , wherein the bidirectional insulation circuit comprises
a first transceiver connected to the secondary-side controller, and
a switch controlled by the primary-side controller, the switch configured to select between the first transceiver and the control input.

11. The power delivery device according to claim 1 , wherein
the bidirectional insulation circuit comprises a first transceiver configured to select between the secondary-side controller and the control input.

12. The power delivery device according to claim 1 , wherein the bidirectional insulation circuit comprises
a first transceiver connected to the secondary-side controller,
a second transceiver connected to a control input, and
a switch configured to select between the first transceiver and the second transceiver.

13. An AC adapter comprising the power delivery device according to claim 1 .

14. An AC charger comprising the power delivery device according to claim 1 .

15. An electronic apparatus comprising the power delivery device according to claim 1 .

16. A power delivery system comprising the power delivery device according to claim 1 .

17. A power delivery device comprising:
a DC/DC converter disposed between an input and a VBUS output;
a primary-side controller configured to control an input current of the DC/DC converter;
a bidirectional insulation circuit coupled to a control input, the bidirectional insulation circuit configured to receive a control input signal of the control input, and to feed the received control input signal back to the primary-side controller, the control input independent from the VBUS output;
a switch disposed between an output of the DC/DC converter and the VBUS output, the switch SW configured to interrupt the output of the DC/DC converter, wherein the switch is not a component configuring the DC/DC converter;
a secondary-side controller connected to the bidirectional insulation circuit, the secondary-side controller configured to execute on/off control of the switch;
a monitor circuit configured to detect a primary-side signal of the DC/DC converter; and
a power output circuit connected to the primary-side controller, the power output circuit configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs, wherein
the primary-side controller varies an output voltage value and an available output current value of the DC/DC converter by controlling the secondary-side controller through the bidirectional insulation circuit on the basis of the signal detected by the monitor circuit;
the bidirectional insulation circuit is coupled to a plurality of control inputs, and is structured execute signal conversion and switching of control input signals of the plurality of the control inputs.

18. A power delivery device comprising:
a DC/DC converter disposed between an input and a VBUS output;
a primary-side controller configured to control an input current of the DC/DC converter;
a bidirectional insulation circuit coupled to a control input, the bidirectional insulation circuit configured to receive a control input signal of the control input, and to feed the received control input signal to the primary-side controller, the control input independent from the VBUS output;
a switch disposed between an output of the DC/DC converter and the VBUS output, the switch SW configured to interrupt the output of the DC/DC converter, wherein the switch is not a component configuring the DC/DC converter;
a secondary-side controller connected to the bidirectional insulation circuit, the secondary-side controller configured to execute on/off control of the switch;
an error amplifier connected between the output of the DC/DC converter and the bidirectional insulation circuit; and
a power output circuit connected to the primary-side controller, the power output circuit configured to supply output voltages to a plurality of VBUS outputs disposed in pairs with the plurality of the control inputs, wherein
the primary-side controller receives a feedback signal received through the bidirectional insulation circuit on the basis of a detected signal of the error amplifier, and varies an output voltage value and an available output current va

Assignees

• Rohm Co Ltd

Inventors

• Ono Akihiro

Classifications

• H02J1/082

  DC supplies with two or more different DC voltage levels · CPC title

• H02J1/002

  using intermediate DC-AC-DC conversion · CPC title

• H04B3/56

  Circuits for coupling, blocking, or by-passing of signals · 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

• H02M3/33523

  with galvanic isolation between input and output of both the power stage and the feedback loop · CPC title