Multi-mode power receiving unit and methods for use therewith

Patent metadata

Field	Value
Publication number	US-9985443-B2
Application number	US-201514965400-A
Country	US
Kind code	B2
Filing date	Dec 10, 2015
Priority date	Nov 18, 2015
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

Aspects of the subject disclosure may include, for example, a power receiving unit that includes a first wireless power receiver configured to receive a first wireless power signal in accordance with a first wireless power standard and a second wireless power receiver configured to receive a second wireless power signal in accordance with a second wireless power standard. A controllable rectifier circuit is configured to rectify either the first wireless power signal or the second wireless power signal. The controllable rectifier circuit includes a rectifier circuit configured to generate a rectified voltage from the wireless power signal, based on switch control signals. A rectifier control circuit is configured to determine whether the first wireless power signal or the second wireless power signal is received and to generate the switch control signals, based on whether the first wireless power signal or the second wireless power signal is received.

First claim

What is claimed is:

1. A power receiving unit comprising:
a first wireless power receiver configured to receive a first wireless power signal in accordance with a first wireless power standard;
a second wireless power receiver configured to receive a second wireless power signal in accordance with a second wireless power standard;
a controllable rectifier circuit configured to rectify one of: the first wireless power signal or the second wireless power signal, the controllable rectifier circuit comprising:
a rectifier circuit configured to generate a rectified voltage from the wireless power signal, based on switch control signals; and
a rectifier control circuit configured to determine whether the first wireless power signal or the second wireless power signal is received and to generate the switch control signals, based on whether the first wireless power signal or the second wireless power signal is received wherein the rectifier circuit includes three half-bridge rectifiers; wherein the rectifier control circuit is further configured to generate the switch control signals to operate a first proper subset of the three half-bridge rectifiers when the first wireless power signal is received and configured to generate the switch control signals to operate a second proper subset of the three half-bridge rectifiers when the second wireless power signal is received; and wherein a single one of the three half-bridge rectifiers is in both the first proper subset and the second proper subset.

2. The power receiving unit of claim 1 wherein the rectifier control circuit determines whether the first wireless power signal or the second wireless power signal is received based on detecting a received energy from one of: the first power receiver or the second power receiver.

3. The power receiving unit of claim 1 further comprising:
a wireless radio unit that communicates with a power transmitting unit to establish a wireless charging session;
wherein the rectifier control circuit determines whether the first wireless power signal or the second wireless power signal is received based on data from wireless charging session.

4. The power receiving unit of claim 1 wherein the first wireless power receiver includes a first coil and the second wireless power receiver includes a second coil.

5. The wireless power receiver of claim 4 wherein the first coil and the second coil are shared with a magnetic mobile payment system; and
wherein selection logic selectively couples the first coil and the second coil to either the wireless power receiver or the magnetic mobile payment system in response to an application selection signal.

6. The power receiving unit of claim 1 wherein the first wireless power receiver is further configured to receive a third wireless power signal in accordance with a third wireless power standard.

7. A method comprising:
receiving, at a power receiving unit including a first wireless power receiver and a second wireless power receiver, a wireless power signal from a power transmitting unit;
determining whether the wireless power signal is received via the first wireless power receiver or the second wireless power receiver;
generating switch control signals via the power receiving unit based on whether the wireless power signal is received via the first wireless power receiver or the second wireless power receiver; and
generating, via a rectifier circuit of the power receiving unit, a rectified voltage from the wireless power signal, based on switch control signals wherein the rectifier circuit includes three half-bridge rectifiers; wherein the switch control signals are generated to operate a first proper subset of the three half-bridge rectifiers when the wireless power signal is received via the first wireless power receiver and to operate a second proper subset of the three half-bridge rectifiers when the wireless power signal is received via the second wireless power receiver; and wherein a single one of the three half-bridge rectifiers is in both the first proper subset and the second proper subset.

8. The method of claim 7 wherein determining whether the wireless power signal is received via the first wireless power receiver or the second wireless power receiver is based on detecting a received energy from one of: the first power receiver or the second power receiver.

9. The method of claim 7 wherein determining whether the wireless power signal is received via the first wireless power receiver or the second wireless power receiver is based on data from wireless charging session establishment procedure communicated via a wireless radio unit.

10. A power receiving unit comprising:
a first wireless power receiver configured to receive a first wireless power signal in accordance with a first wireless power standard;
a second wireless power receiver configured to receive a second wireless power signal in accordance with a second wireless power standard;
a controllable rectifier circuit configured to rectify one of: the first wireless power signal or the second wireless power signal, the controllable rectifier circuit comprising:
a rectifier circuit including three half-bridge rectifiers configured to generate a rectified voltage from the wireless power signal, based on switch control signals; and
a rectifier control circuit configured to determine whether the first wireless power signal or the second wireless power signal is received and to generate the switch control signals to control operation of a selected two of the three half-bridge rectifiers, based on whether the first wireless power signal or the second wireless power signal is received.

11. The power receiving unit of claim 10 wherein the rectifier control circuit determines whether the first wireless power signal or the second wireless power signal is received based on detecting a received energy from one of: the first power receiver or the second power receiver.

12. The power receiving unit of claim 10 further comprising:
a wireless radio unit that communicates with a power transmitting unit to establish a wireless charging session;
wherein the rectifier control circuit determines whether the first wireless power signal or the second wireless power signal is received based on data from wireless charging session.

13. The power receiving unit of claim 10 wherein the first wireless power receiver and the second wireless power receiver share a single coil.

Assignees

• Broadcom Corp
• Avago Technologies General Ip

Inventors

• Walley John Stuart
• Recker David Lee

Classifications

• H02J5/005 Primary

  Electricity · mapped topic

• H02J50/12 Primary

  of the resonant type · CPC title

• H02M3/335

  using semiconductor devices only · CPC title

• H02J7/025 Primary

  Electricity · mapped topic

• H02J50/10 Primary

  using inductive coupling · CPC title