CA2556446A1 - Method and apparatus for handling a charging state in a mobile electronic device - Google Patents

Method and apparatus for handling a charging state in a mobile electronic device Download PDF

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Publication number
CA2556446A1
CA2556446A1 CA002556446A CA2556446A CA2556446A1 CA 2556446 A1 CA2556446 A1 CA 2556446A1 CA 002556446 A CA002556446 A CA 002556446A CA 2556446 A CA2556446 A CA 2556446A CA 2556446 A1 CA2556446 A1 CA 2556446A1
Authority
CA
Canada
Prior art keywords
mobile device
usb
powering
circuitry
bus voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002556446A
Other languages
French (fr)
Other versions
CA2556446C (en
Inventor
Martin G. A. Guthrie
Michael F. Habicher
Alexei Skarine
Dusan Veselic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fundamental Innovation Systems International LLC
Original Assignee
Research In Motion Limited
Martin G. A. Guthrie
Michael F. Habicher
Alexei Skarine
Dusan Veselic
Blackberry Limited
Fundamental Innovation Systems International Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Research In Motion Limited, Martin G. A. Guthrie, Michael F. Habicher, Alexei Skarine, Dusan Veselic, Blackberry Limited, Fundamental Innovation Systems International Llc filed Critical Research In Motion Limited
Publication of CA2556446A1 publication Critical patent/CA2556446A1/en
Application granted granted Critical
Publication of CA2556446C publication Critical patent/CA2556446C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/263—Arrangements for using multiple switchable power supplies, e.g. battery and AC
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/382—Information transfer, e.g. on bus using universal interface adapter
    • G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging

Abstract

Powering a mobile device and charging a rechargeable battery in the mobile device from a USB host. A voltage regulator may be coupled to the USB
interface and operable to receive a USB bus voltage from the USB interface and use the USB bus voltage to power the processing device. A timing circuitry may be used to disable the voltage regulator from powering the processing device after the timing circuitry has measured the passage of a pre-determined amount of time upon detecting the USB bus voltage. A battery charger may be used to receive the USB bus voltage from the USB interface and use the USB bus voltage to power the processing device and to charge the rechargeable battery. The processing device may enable the battery charger to power the processing device and to charge the rechargeable battery when the enumeration acknowledgement signal is received from the USB host.

Claims (17)

1. A mobile device, comprising:
host;
a universal serial bus (USB) interface for connecting the mobile device to a USB
a processing device operable to execute programs and to control operation of the mobile device, the processing device being further operable to receive an enumeration acknowledgement signal from the USB host via the USB interface;
a rechargeable battery for powering the processing device;
a voltage regulator coupled to the USB interface and operable to receive a USB
bus voltage from the USB interface and use the USB bus voltage to power the processing device;
a timing circuitry operable to disable the voltage regulator from powering the processing device after a pre-determined amount of time has expired, the timing circuitry being operable to measure the passage of the pre-determined amount of time upon detecting the USB bus voltage; and a battery charger operable to receive the USB bus voltage from the USB
interface and use the USB bus voltage to power the processing device and to charge the rechargeable battery;
wherein the processing device enables the battery charger to power the processing device and to charge the rechargeable battery when the enumeration acknowledgement signal is received from the USB host.
2. The mobile device of claim 1, wherein the processing device is further operable to disable both the voltage regulator and the battery charger if a device suspend state request signal is received from the USB host.
3. The mobile device of claim 1, further comprising:
a logic circuitry for selecting one of a voltage output of the voltage regulator or a voltage output of the battery charger to power the processing device.
4. The mobile device of claim 3, wherein the logic circuitry is a Diode OR
circuitry.
5. ~The mobile device of claim 1, wherein the timing circuitry comprises:
a resistor-capacitor (RC) circuitry coupled to the USB interface for measuring the passage of the pre-determined amount of time; and a switching circuitry that is controlled by the RC circuitry and is operable to disable the voltage regulator from powering the processing device.
6. ~The mobile device of claim 5, wherein the switching circuitry includes a transistor pair, wherein the RC circuitry causes the transistor pair to disconnect the voltage regulator from the processing device after the pre-determined amount of time has expired.
7. ~The mobile device of claim 1, wherein the pre-determined amount of time is an amount of time specified by the USB specifications during which the mobile device may be powered from the USB host without receiving the enumeration acknowledgement signal.
8. ~The mobile device of claim 7, wherein the pre-determined amount of time is less than or equal to 100 msec.
9. ~The mobile device of claim 1, wherein the voltage regulator is a low dropout (LDO) regulator.
10. ~The mobile device of claim 1, wherein the voltage regulator is a switched mode power supply (SMPS).
11. ~A method for powering a mobile device and charging a battery in the mobile device from a USB host, comprising:
detecting a USB bus voltage from the USB host;
upon detecting the USB bus voltage, measuring the passage of a pre-determined amount of time, the pre-determined amount of time being an amount of time specified by the USB specifications during which the mobile device may be powered from the USB
host without receiving an enumeration acknowledgement signal;

after detecting the USB bus voltage and before the passage of the pre-determined amount of time, using a first circuitry to power the mobile device using the USB bus voltage;
monitoring the USB host for the enumeration acknowledgement signal;
if the enumeration acknowledgement signal is received before the pre-determined amount of time has expired, then using a second circuitry to power the mobile device and charge the battery using the USB bus voltage; and once the pre-determined amount of time has expired, disabling the first circuitry from powering the mobile device using the USB bus voltage.
12. ~The method of claim 11, further comprising:
selecting one of the first circuitry or the second circuitry to power the mobile device.
13. ~The method of claim 11, further comprising:
monitoring the USB host for a device suspend state request signal;
if the device suspend state request signal is detected, then disabling the first circuitry and the second circuitry from powering the mobile device or charging the battery.
14. ~A mobile device, comprising:
a universal serial bus (USB) interface for connecting the mobile device to a USB
host;
a rechargeable battery for powering the mobile device;
first means for powering the mobile device using a USB bus voltage from the USB
host;~
means for disabling the first powering means from powering the processing device after a pre-determined amount of time has expired from when the USB bus voltage is first detected; and second means for powering the mobile device using the USB bus voltage;
wherein the second powering means is enabled to power the mobile device if an enumeration acknowledgement signal is received from the USB host before the pre-determined amount of time has expired.
15. ~The mobile device of claim 14, wherein the second power means also uses the USB bus voltage to charge a rechargeable battery.
16. ~The mobile device of claim 14, further comprising:
means for selecting one of the first power means or the second powering means to power the mobile device.
17. ~The mobile device of claim 14, further comprising:
means for detecting a device suspend state request signal from the USB host, and upon detecting the device suspend state request signal, disabling the first powering means and the second powering means from powering the mobile device using the USB
bus voltage.
CA2556446A 2004-02-17 2004-12-30 Method and apparatus for handling a charging state in a mobile electronic device Active CA2556446C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US54543304P 2004-02-17 2004-02-17
US60/545,433 2004-02-17
PCT/CA2004/002209 WO2005078555A1 (en) 2004-02-17 2004-12-30 Method and apparatus for handling a charging state in a mobile electronic device

Publications (2)

Publication Number Publication Date
CA2556446A1 true CA2556446A1 (en) 2005-08-25
CA2556446C CA2556446C (en) 2011-02-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2556446A Active CA2556446C (en) 2004-02-17 2004-12-30 Method and apparatus for handling a charging state in a mobile electronic device

Country Status (4)

Country Link
US (2) US7679316B2 (en)
EP (2) EP2562618A3 (en)
CA (1) CA2556446C (en)
WO (1) WO2005078555A1 (en)

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Also Published As

Publication number Publication date
EP2562618A3 (en) 2013-05-22
US7847517B2 (en) 2010-12-07
EP1723494A1 (en) 2006-11-22
US20050189909A1 (en) 2005-09-01
WO2005078555A1 (en) 2005-08-25
US20100117595A1 (en) 2010-05-13
EP2562618A2 (en) 2013-02-27
CA2556446C (en) 2011-02-08
EP1723494A4 (en) 2010-09-29
US7679316B2 (en) 2010-03-16

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