CN107005074B - Apparatus and method for providing selectable charging voltage - Google Patents

Apparatus and method for providing selectable charging voltage Download PDF

Info

Publication number
CN107005074B
CN107005074B CN201580064238.3A CN201580064238A CN107005074B CN 107005074 B CN107005074 B CN 107005074B CN 201580064238 A CN201580064238 A CN 201580064238A CN 107005074 B CN107005074 B CN 107005074B
Authority
CN
China
Prior art keywords
frequency
output voltage
power management
power
management signal
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.)
Active
Application number
CN201580064238.3A
Other languages
Chinese (zh)
Other versions
CN107005074A (en
Inventor
A·贝比
S·帕拉塔班
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.)
Intel Corp
Original Assignee
Intel Corp
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 Intel Corp filed Critical Intel Corp
Publication of CN107005074A publication Critical patent/CN107005074A/en
Application granted granted Critical
Publication of CN107005074B publication Critical patent/CN107005074B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • 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
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/30—Charge provided using DC bus or data bus of a computer
    • 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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

In an embodiment, an apparatus includes detector logic having a first resonant frequency. The detector logic is to receive a power management signal having a power management signal frequency and to provide an indication of whether the power management signal frequency is within a first frequency difference of the first resonant frequency. The apparatus also includes switching signal logic to activate a first switching signal in response to the indication that the management signal frequency is within the first frequency difference of the first resonant frequency to cause power adapter circuitry to change an output voltage from a first voltage to a second voltage different from the first voltage. Other embodiments are described and claimed.

Description

Apparatus and method for providing selectable charging voltage
Technical Field
The field is power transmission.
Background
Portable Devices (PDs), such as tablet computers and mobile phones, may use micro Universal Serial Bus (USB) ports or type C USB ports for charging and data transfer. For example, charging through a micro-USB or type-C USB port may be done at 5V, 1.5A (e.g., 7.5W), and may require a long time to charge. Further, if the device is active when charging, the charging time may be longer than if the device was not active during charging.
Drawings
Fig. 1 is a block diagram of an apparatus according to an embodiment of the invention.
Fig. 2 is a block diagram of an apparatus according to another embodiment of the invention.
Fig. 3 is a flow chart of a method according to an embodiment of the invention.
Fig. 4 is a flow diagram of a method according to another embodiment of the invention.
Detailed Description
In an embodiment, an Alternating Current (AC) power adapter may include a detection device that may enable a power supply to charge a portable device at a selectable rate, for example, at a standard (also referred to herein as "normal") rate (e.g., 5V, 1.5 amps) and at a higher rate than the standard rate. Embodiments may enable charging at higher than standard rates with relatively low cost implementations, and without adding integrated circuits in the AC power adapter.
In an embodiment, the USB dedicated charging AC adapter may utilize the portable device handshake and may enable the USB charging voltage to increase from a first voltage level (e.g., 5V) to a second voltage level (e.g., 12V), which may result in rapid charging of the portable device via the USB port. Detection of a compatible portable device by an AC adapter may be accomplished via an inductor-capacitor (L-C) tank circuit at defined frequency resonance. Identifying compatible portable devices using L-C tank circuits may be implemented at a lower cost than, for example, using an application specific Integrated Circuit (IC) in an AC adapter to identify compatible portable devices. In some embodiments, multiple L-C tank circuits may be employed to enable charging at any of multiple voltage levels, e.g., without affecting USB communication. Charging at higher voltage levels may be enabled whether the portable system is in an off mode or an active mode. The use of one or more L-C tank circuits may be compatible with, for example, USB BC1.2 and USB Power Delivery (PD) specifications.
Fig. 1 is a block diagram of an apparatus 100 according to an embodiment of the invention. Apparatus 100 includes a USB AC adapter 110 and a portable device 150 that includes power management logic 120 and a system on a chip (SOC) 130. The USB AC adapter 110 is connected to the portable device 150 via the USB connector 140.
The USB AC adapter 110 includes an AC/DC converter 112 and a detector 114. In portable device 150, power management logic 120 includes USB charger interface 122, status/configuration register 124, USB switch 126, signal generator logic 152, current meter 154 (e.g., current measurement logic), and USB port 140. The USB port 140 may be, for example, a mini-AB port, a C-port, or another USB port.
In an embodiment, the change of the charging voltage from the first charging voltage to the second (e.g., higher) charging voltage through the USB port 140 may occur as follows. (in other embodiments, the order of the acts performed may be changed.)
The USB adapter 110 may be coupled to the AC power source 102. When USB adapter 110 is coupled to AC power source 102, USB adapter 110 may drive a first voltage (e.g., 5V) to USB port 140. Alternatively, power conduit VBUS (V-bus) 122 may be enabled only after detecting an Upstream Facing Port (UFP) pull-down on the CC pin of USB adapter 110 (e.g., detecting at line 142 output from USB port 140). In some embodiments, the USB adapter 110 behaves like an BC1.2DCP adapter and conforms to the BC1.2DCP adapter specification.
Portable device 150 may detect that USB adapter 110 is a dedicated charger. In the case of USB type B or AB, the D +/D-line 118/119 may be used for voltage negotiation. When using a type C USB port, such as USB port 160, D +, D-, CC, SBU1, SBU2, RX1+, RX1-, RX2+, RX2-, TX1+, TX1-, TX2+, or TX 2-may be used for voltage negotiation. The portable device 150 begins to charge at the normal charging voltage. In some embodiments, the normal charging voltage is about 5 volts.
The signal generator logic 152 may generate a signal (e.g., a square wave signal) and send the signal to the available lines (e.g., for type B or type AB, or D +118 or D-line 119; for type C, any of the lines listed above) via the charger interface 122 at a signal frequency that may increase within a defined frequency band. The signal may be communicated to USB adapter 110. The signal frequency may start from a minimum frequency and the frequency may be increased in incremental steps (e.g., frequency sweep or frequency drive herein).
The portable device 150 may detect the resonant load during a frequency sweep, for example, via a change in current provided by the signal generator logic 152 (as detected by the current meter 154). The portable device 150 may fine tune and lock onto the signal frequency at or near the resonant frequency of the tank circuit located within the detector 114 of the USB adapter. If no resonant load is found, the portable device 150 will continue to charge normally at the normal charging voltage.
In some embodiments, at or near resonance (e.g., at signal frequencies within a frequency band that may include the resonant frequency of the tank circuit and that may extend above and below the resonant frequency by a frequency difference), the L-C tank circuit voltage at the USB AC adapter 110 may increase many times the drive voltage (e.g., from 3.3V to over 5V). This voltage increase may occur at or near the resonant frequency of the tank circuit. The increased voltage may be used, for example, to activate a Field Effect Transistor (FET) within the detector 114 in order to change the AC adapter output voltage. A higher voltage at resonance may serve as an indicator that the charging voltage may change (e.g., to a higher output voltage). Resonance and resulting higher resonant circuit voltage may be different manifestations that are not easily confused by other communication waveforms.
A different resonant frequency may be assigned to each of the plurality of high voltage levels, each of which may have a corresponding L-C tank within the detector 114. In some embodiments, the AC USB adapter 110 may support multiple output voltage levels.
The portable device 150 may check the desired output voltage (e.g., higher charging voltage) from the AC adapter 110 on VBUS 122/142. If the desired output voltage from the AC adapter 110 via the USB port 140 is available before the blanking interval expires, the portable device 150 is enabled to charge at a higher rate. If the desired output voltage is not available before the expiration of the blanking interval, the portable device 150 may stop the frequency sweep and may continue normal charging, for example, at a normal charging voltage. In one embodiment, the normal charging voltage is about 5 volts.
When the USB AC adapter 110 is not plugged in from the portable device 150, the adapter output voltage may be reduced to a normal voltage (e.g., 5V) as the signal is disconnected from the USB AC adapter 110. There may be a time-out delay before the charging voltage is reduced to the initial voltage. In some embodiments, the timeout delay may be less than the shortest practical time to remove a connector (e.g., USB connector 140) from one device and insert into another device compatible with the BC1.2 specification.
When the USB AC adapter 110 is disconnected, the portable device 150 may be disconnected from the signal (e.g., square wave signal) and normal port functionality may be restored.
FIG. 2 is a block diagram of a USB AC adapter 200 according to another embodiment of the present invention. The USB AC adapter 200 may include an AC/DC converter 210 and a detector 220. Lines D +232, D-234, VBUS 236, and CC 238 are also shown. (in other embodiments, for example, for use with a type C USB port, the available line from the type C USB port may be used in voltage negotiation.)
In operation, the USB AC adapter 200 may be adapted/configured for coupling to a portable device (not shown) via a USB plug 240 (e.g., an AB USB port, or a micro/C-type plug, or another USB plug). Upon detection of the USB AC adapter 200 by the portable device (via the USB plug 240), a signal (e.g., a square wave signal) may be received at the detector 220 (e.g., from the portable device) via one or more of the lines D +232, D-234 or (e.g., for a type C USB port) via another available line. The received signal may have a frequency f that varies with timeSignalE.g., a sweep within a determined frequency band (e.g., from the lowest frequency of the frequency band to the highest frequency of the frequency band).
The L-C tank circuit 222 within the detector 220 can "see" the signal. The L-C tank 222 may be adjusted to a resonant frequency f, for example, determined by the values of the inductor L and the capacitor C. When the frequency f is changedSignalNear the resonant frequency f, the voltage across the L-C tank 222 may rise, and at the frequency fSignalBecoming a value that is increasingly different from the resonant frequency f, the voltage across the L-C tank circuit 222 may drop to a steady value. The portable equipment can be connected with the measuring signal generatorThe current output by the logic (e.g., within the portable device 150) detects resonance in the L-C tank circuit 222, and when resonance is detected, the signal generator logic within the portable device 150 may return to the frequency range in which resonance has been detected and may lock on or near the resonant frequency f (e.g., within a determined frequency difference of the resonant frequency f, the determined frequency difference forming a frequency band including frequencies below and above the resonant frequency f). The diode 224 may rectify the AC voltage into a DC signal and the resistor-capacitor (R-C) circuit 226 may ensure that the voltage at the resonant frequency f lasts for a minimum R-C time constant before activating the Field Effect Transistor (FET) 228. After the FET 228 is activated, the AC/DC logic 210 may switch from the first charging voltage to a second charging voltage, which may be higher than the first charging voltage, for example. The charging voltage may be provided to the portable device via the VBUS 236.
Other embodiments may include a plurality of L-C tanks, each of which is tuned to a respective resonant frequency. Each resonant frequency may be associated with a different charging voltage provided by the AC/DC logic 210 and may be determined by locking a signal frequency (e.g., provided by the portable device) to a frequency value f that is substantially the same (or close to) a corresponding resonant frequency of the L-C tank circuit associated with the desired charging voltageSignalTo activate a particular charging voltage.
Fig. 3 is a flow chart 300 of a method according to an embodiment of the invention. At decision diamond 302, if the portable device detects that the USB port VUSB (e.g., charging line) of the USB port is valid, then proceeding to block 304, detection is initiated by the portable device (e.g., according to the BC1.2 specification). Proceeding to decision diamond 306, if a dedicated charger is not detected, then moving to block 308, normal portable device functionality is continued for the Portable Device (PD) coupled to the fixed output voltage charger. If a dedicated (e.g., multi-level voltage) charger is detected, moving to block 310, a signal (e.g., a square wave signal) is applied to the idle pin of the USB port. The signal has an associated frequency that can be swept through a frequency band. For example, the sweep may be from a minimum frequency of the band to a maximum frequency of the band.
Continuing to decision diamond 312, if the portable device does not detect a resonance (resonance associated with the USB AC adapter circuitry, which may be detected via, for example, current measurement logic), continuing to block 314, the signal is stopped and charging at the standard charging voltage is continued. At decision diamond 312, if resonance is detected at the portable device (e.g., by a current measurement provided by the signal generator logic), then proceeding to block 316, the frequency sweep is stopped and the frequency of the signal is locked at or near the resonant frequency, e.g., within a frequency band including frequencies above and below the resonant frequency. For example, the frequency band may include frequencies that are within a defined frequency difference of the resonant frequencies.
Proceeding to block 318, if VBUS does not provide the desired charging voltage to the portable device, proceeding to decision diamond 320, if the blanking interval has not expired, VBUS is again checked for the desired charging voltage (some time may elapse before switching the charging voltage). If the blanking interval expires and the desired charging voltage is not provided via VBUS, proceed to block 314, end signal and continue charging at the regular charging voltage.
At decision diamond 318, if VBUS applies the desired charging voltage, then proceed to block 322, enabling charging at a desired rate (e.g., a faster than normal rate). Proceeding to decision diamond 324, VBUS is monitored to ensure that the desired charging voltage is provided via VBUS. If the desired charging voltage is not provided, then proceed to block 326, the signal is stopped, charging is stopped, and an interrupt is generated and sent to, for example, a System On Chip (SOC) of the portable device to indicate that an error has occurred.
Fig. 4 is a flow diagram of a method 400 according to another embodiment of the invention. At decision diamond 402, if the USB AC adapter is plugged into an AC power source, proceeding to block 404, the USB AC adapter drives a standard (e.g., normal) voltage (e.g., 5V) to VBUS, which is an output bus that carries a charging voltage to a USB port coupled to the portable device. Proceeding to decision diamond 406, if the USB AC adapter detects a resonant frequency of a signal, which corresponds to a resonant tank circuit of the USB AC adapter, a signal (e.g., a square wave signal) is provided by the portable device onto a selected USB pin (e.g., a D +, D-, or other available pin), proceeding to decision diamond 408, if a blanking interval expires, proceeding to block 410, a desired charging voltage (e.g., a high charging voltage) is enabled on VBUS. If the blank time has not expired, return to decision diamond 408, and when the blank time has expired, continue to block 410, the desired charge voltage is enabled on VBUS.
Proceeding to decision diamond 412, as long as a resonant frequency (e.g., a signal from the portable device that is at or near the resonant frequency and is received at the USB AC charger) is detected on the selected USB pin to which the portable device has provided a signal, the USB AC charger will continue to provide the desired charging voltage (e.g., high voltage) via VBUS. If the resonant frequency (or a signal having a frequency close to the resonant frequency) is not detected on the selected USB pin, proceeding to decision diamond 414, if the blanking interval has not expired, returning to decision diamond 412, the USB AC adapter continues to determine if the resonant frequency is on the selected pin. If the blanking interval has expired, then returning to block 404, the standard voltage is again provided via VBUS for charging the portable device.
Additional embodiments are described below.
In a first embodiment, an apparatus includes detector logic having a first resonant frequency. The detector logic is to receive a power management signal having a power management signal frequency and to provide an indication of whether the power management signal frequency is within a first frequency difference of the first resonant frequency. The apparatus also includes switching signal logic to activate a first switching signal in response to the indication that the power management signal frequency is within the first frequency difference of the first resonant frequency to cause power adapter circuitry to change an output voltage from a first voltage to a second voltage different from the first voltage.
A second embodiment includes the elements of embodiment 1 and further includes the power adapter circuitry to input alternating current (a.c.) and output direct current (d.c.) at an output voltage selected from a plurality of selectable output voltages. In response to receiving the first switching signal, the power adapter circuitry is to change the output voltage from the first voltage to the second voltage.
Embodiment 3 includes elements as described in embodiment 2. Additionally, the power adapter circuitry is to provide the output voltage to a Universal Serial Bus (USB) connector.
Embodiment 4 includes the elements as described in embodiment 3 and further includes the USB connector.
Embodiment 5 includes elements as described in embodiment 1. Additionally, the switching signal logic is to deactivate the first switching signal in response to a change in the power management signal frequency from a first frequency that is within the first differential frequency of the resonant frequency to a second frequency that is outside the first frequency difference of the resonant frequency. The output voltage will change from the second voltage to the first voltage after deactivating the first switching signal.
Embodiment 6 includes the elements of embodiment 1 wherein the second voltage is greater than the first voltage.
Embodiment 7 includes the elements of embodiment 6 wherein the first voltage is approximately 5 volts and the second voltage is approximately 12 volts.
An 8 th embodiment includes the elements of embodiment 1, wherein the detector logic has a second resonant frequency, the detector logic to provide an indication of whether the power management signal frequency is within a second frequency difference of the second resonant frequency, and wherein, in response to the indication that the management signal frequency is within the second frequency difference of the second resonant frequency, the switching signal logic is to activate a second switching signal to cause the power adapter circuitry to output a third voltage different from the first voltage and the second voltage.
Embodiment 9 includes the elements of embodiment 1 wherein, after identifying the indication that the power management signal frequency is within the first frequency difference of the first resonant frequency, the switching signal logic is to cause the power adapter circuitry to change the output voltage from the first voltage to the second voltage after expiration of a blanking interval that begins when the detector logic is enabled to detect the power management signal.
An 10 th embodiment includes the elements of embodiment 1, wherein the detector logic comprises resonant circuitry having a resonant frequency that is the first resonant frequency.
Embodiment 11 includes the elements of embodiment 10 wherein the resonant circuitry comprises an inductor-capacitor (L-C) tank circuit.
The 12 th embodiment is a method, comprising: receiving, at a detector logic, a power management signal having a power management signal frequency; determining whether the power management signal frequency is within a first frequency difference of a first resonant frequency; and in response to the power management signal frequency being within the first frequency difference of the first resonant frequency, providing a first indication for switching an output voltage of power circuitry from a first output voltage to a second output voltage different from the first output voltage.
The 13 th embodiment includes the elements as in the 12 th embodiment, and further includes: after switching the output voltage of the power logic to the second output voltage, providing a second indication to cause the output voltage of the power circuitry to switch to the first output voltage in response to the power management signal frequency becoming a second power management signal frequency outside the first frequency difference of the first resonant frequency.
A 14 th embodiment includes the elements as in the 12 th embodiment, wherein the output voltage of the power circuitry switches from the first output voltage to the second output voltage after a blanking interval expires when the power management signal frequency is within the first frequency difference of the first resonant frequency.
Embodiment 15 includes the elements of embodiment 12 wherein the second output voltage is greater than the first output voltage.
Embodiment 16 includes the elements as in embodiment 12, further comprising: determining whether the power management signal frequency is within a second frequency difference of a second resonant frequency; and responsive to the power management signal frequency being within the second frequency difference of the second resonant frequency, providing a second indication for the output voltage of power circuitry to become a third output voltage different from the first output voltage and the second output voltage.
Embodiment 17 is an apparatus for performing the method of any one of embodiments 12-16.
Embodiment 18 is an apparatus comprising means for performing the method of any of embodiments 12-16.
The 19 th embodiment is a computer readable medium storing processor-executable instructions that, when executed by a processor, cause the processor to perform the following: receiving, at a power management logic, a power management signal having a power management signal frequency; determining whether the power management signal frequency is within a first frequency difference of a first resonant frequency; and switching an output voltage of power circuitry from a first output voltage to a second output voltage different from the first output voltage in response to the power management signal frequency being within the first frequency difference of the first resonant frequency.
Embodiment 20 includes the elements as in embodiment 19 and further includes instructions to: switching the output voltage of the power circuitry to the first output voltage after switching the output voltage of the power logic to the second output voltage and in response to the power management signal frequency having a second power management signal frequency outside of the first frequency difference of the first resonant frequency.
Embodiment 21 includes the elements as in embodiment 19 and further includes instructions to: waiting for a blanking time interval to expire before switching the output voltage of the power circuitry to the second output voltage when the power management signal frequency is within the first frequency difference of the first resonant frequency, wherein the blanking time interval begins at an initial time that is determined that the power management signal frequency is within the first frequency difference of the first resonant frequency.
Embodiment 22 includes the elements of embodiment 19, further including instructions to: determining whether the power management signal frequency is within a second frequency difference of a second resonant frequency and changing the output voltage of power circuitry to a third output voltage different from the first output voltage and the second output voltage in response to the power management signal frequency being within the second frequency difference of the second resonant frequency.
Embodiment 23 is an apparatus comprising: means for receiving a power management signal having a power management signal frequency; means for determining whether the power management signal frequency is within a first frequency difference of a first resonant frequency; and means for providing a first indication to switch an output voltage of power circuitry from a first output voltage to a second output voltage different from the first output voltage in response to the power management signal frequency being within the first frequency difference of the first resonant frequency.
Embodiment 24 includes the elements of embodiment 23, further comprising: means for providing a second indication after switching the output voltage of the power logic to the second output voltage in response to changing the power management signal frequency to a second power management signal frequency outside of the first frequency difference of the first resonant frequency, the second indication to cause the output voltage of the power circuitry to switch to the first output voltage.
A 25 th embodiment includes the elements of the 23 th embodiment, further comprising means for switching the output voltage of the power circuitry from the first output voltage to the second output voltage after a blanking interval expires when the power management signal frequency is within the first frequency difference of the first resonant frequency.
Embodiment 26 includes the elements of embodiment 23 wherein the second output voltage is greater than the first output voltage.
Embodiment 27 includes the elements as in embodiment 23, and further includes: means for determining whether the power management signal frequency is within a second frequency difference of a second resonant frequency; and means for providing a second indication in response to the power management signal frequency being within the second frequency difference of the second resonant frequency, the second indication for causing the output voltage of power circuitry to become a third output voltage different from the first output voltage and the second output voltage.
A 28 th embodiment is an apparatus, comprising: frequency generation logic to generate a signal having a signal frequency selectable within a frequency band; a first pin for outputting the signal to a power supply; a second pin to receive first power at a first voltage from the power supply; and current measurement logic to measure a current provided to the first pin by the frequency generation logic. The frequency generation logic is to change the signal frequency within the frequency band, and in response to a first current increase detected by the current measurement logic when the signal frequency is near a first frequency of the frequency band, the frequency generation logic is to lock the signal frequency at a first locking frequency near the first frequency, and after locking the signal frequency at the first locking frequency, the second pin is to receive a second power at a second voltage from the power supply.
A 29 th embodiment includes the elements as in the 28 th embodiment and further includes a Universal Serial Bus (USB) port including the first pin and the second pin, the USB port for coupling to a USB connector of the power supply.
Embodiment 30 includes elements as described in embodiment 28. Additionally, in response to a second current increase detected by the current measurement logic when the signal frequency is near a second frequency of the frequency band, the frequency generation logic is to lock the signal frequency at a second lock frequency near the second frequency, and the second pin is to receive a third power at a third voltage from the power supply after locking the signal frequency at the second lock frequency.
Embodiment 31 is a method comprising: generating, by signal generation logic of a device, a signal having a signal frequency selectable within a frequency band; outputting the signal to a power supply; receiving, by the device, first power at a first voltage from the power source; measuring, by current measurement logic of the device, a current provided to the power supply by the frequency generation logic; changing the signal frequency within the frequency band; and locking the signal frequency at a first locking frequency that is close to a first frequency of the frequency band in response to detecting the first current increase when the signal frequency is close to the first frequency. Receiving second power at a second voltage from the power source after locking the signal frequency at the first locking frequency.
A 32 nd embodiment includes the elements as in the 31 st embodiment, and further includes: in response to detecting the second current increase when the signal frequency is near a second frequency of the frequency band, locking the signal frequency at a second locking frequency near the second frequency, wherein third power at a third voltage is to be received from the power source after locking the signal frequency at the second locking frequency.
Embodiments may be used in many different types of systems. For example, in one embodiment, a communication device may be arranged to perform the various methods and techniques described herein. Of course, the scope of the invention is not limited to communication devices, and instead, other embodiments may be directed to other types of apparatuses for processing instructions, or one or more machine-readable media comprising instructions that, in response to being executed on a computing device, cause the device to carry out one or more of the methods and techniques described herein.
Embodiments may be implemented in code and may be stored on a non-transitory storage medium having stored thereon instructions which can be used to program a system to perform the instructions. Embodiments may also be implemented in data and may be stored on a non-transitory storage medium, which when executed by at least one machine, causes the at least one machine to assist at least one integrated circuit in performing one or more operations. The storage medium may include, but is not limited to, any type of disk including: floppy disks, optical disks, Solid State Drives (SSDs), compact disk read-only memories (CD-ROMs), rewritable compact disks (CD-RWs), and magneto-optical disks; semiconductor devices such as Read Only Memory (ROM), Random Access Memory (RAM) such as Dynamic Random Access Memory (DRAM) and Static Random Access Memory (SRAM); erasable programmable read-only memory (EPROM); flashing; an Electrically Erasable Programmable Read Only Memory (EEPROM); magnetic or optical cards; or any other type of media suitable for storing electronic instructions.
While the present invention has been described with respect to a limited number of embodiments, those skilled in the art will appreciate numerous variations and modifications therefrom. It is intended that the appended claims cover all such modifications and variations as fall within the true spirit and scope of this present invention.

Claims (33)

1. An apparatus for providing a selectable charging voltage, comprising:
detector logic having a first resonant frequency, the detector logic to receive a power management signal having a power management signal frequency, the detector logic to provide an indication of whether the power management signal frequency is within a first frequency band that includes the first resonant frequency; and
switching signal logic to activate a first switching signal to cause power adapter circuitry to change an output voltage from a first voltage to a second voltage different from the first voltage in response to the indication that the power management signal frequency is within the first frequency band including the first resonant frequency.
2. The apparatus of claim 1, further comprising the power adapter circuitry to input alternating current (a.c.) and output direct current (d.c.) at an output voltage selected from a plurality of selectable output voltages, wherein the power adapter circuitry is to change the output voltage from the first voltage to the second voltage in response to receiving the first switching signal.
3. The apparatus of claim 2, wherein the power adapter circuitry is to provide the output voltage to a Universal Serial Bus (USB) connector.
4. The apparatus of claim 3, further comprising the USB connector.
5. The apparatus of claim 1, wherein the switching signal logic is to deactivate the first switching signal in response to a change in the power management signal frequency from a first frequency within the first frequency band including the first resonant frequency to a second frequency outside the first frequency band including the first resonant frequency, wherein the output voltage is to change from the second voltage to the first voltage after deactivating the first switching signal.
6. The apparatus of claim 1, wherein the second voltage is greater than the first voltage.
7. The apparatus of claim 6, wherein the first voltage is approximately 5 volts and the second voltage is approximately 12 volts.
8. The apparatus of claim 1, wherein the detector logic has a second resonant frequency, the detector logic to provide an indication of whether the power management signal frequency is within a second frequency band that includes the second resonant frequency, and wherein, in response to the indication that the management signal frequency is within the second frequency band that includes the second resonant frequency, the switching signal logic is to activate a second switching signal to cause the power adapter circuitry to output a third voltage that is different from the first voltage and different from the second voltage.
9. The apparatus of claim 1, wherein, after identifying the indication that the power management signal frequency is within the first frequency band comprising the first resonant frequency, the switching signal logic is to cause the power adapter circuitry to change the output voltage from the first voltage to the second voltage after expiration of a blanking interval beginning when the detector logic is enabled to detect the power management signal.
10. The apparatus of any of claims 1-9, wherein the detector logic comprises resonant circuitry having a resonant frequency that is the first resonant frequency.
11. The apparatus of claim 10, wherein the resonant circuitry comprises an inductor-capacitor (L-C) tank circuit.
12. A method for providing a selectable charging voltage, comprising:
receiving, at a detector logic, a power management signal having a power management signal frequency;
determining whether the power management signal frequency is within a first frequency band that includes a first resonant frequency; and
in response to the power management signal frequency being within the first frequency band including the first resonant frequency, providing a first indication for switching an output voltage of power circuitry from a first output voltage to a second output voltage different from the first output voltage.
13. The method of claim 12, further comprising: after switching the output voltage of power logic to the second output voltage, providing a second indication for causing the output voltage of the power circuitry to switch to the first output voltage in response to the power management signal frequency becoming a second power management signal frequency outside the first frequency band including the first resonant frequency.
14. The method of claim 12, wherein the output voltage of the power circuitry switches from the first output voltage to the second output voltage after a blanking interval expires when the power management signal frequency is within the first frequency band that includes the first resonant frequency.
15. The method of claim 12, wherein the second output voltage is higher than the first output voltage.
16. The method of claim 12, further comprising:
determining whether the power management signal frequency is within a second frequency band that includes a second resonant frequency; and
in response to the power management signal frequency being within the second frequency band including the second resonant frequency, providing a second indication for the output voltage of power circuitry to become a third output voltage different from the first output voltage and the second output voltage.
17. An apparatus for performing the method of any one of claims 12 to 16.
18. A computer readable medium storing processor-executable instructions that, when executed by a processor, cause the processor to:
receiving, at a power management logic, a power management signal having a power management signal frequency;
determining whether the power management signal frequency is within a first frequency band that includes a first resonant frequency; and
switching an output voltage of a power circuitry from a first output voltage to a second output voltage different from the first output voltage in response to the power management signal frequency being within the first frequency band including the first resonant frequency.
19. The computer-readable medium of claim 18, further comprising instructions for: switching the output voltage of the power circuitry to the first output voltage after switching the output voltage of power logic to the second output voltage and in response to the power management signal frequency having a second power management signal frequency outside of the first frequency band including the first resonant frequency.
20. The computer-readable medium of claim 18, further comprising instructions for: waiting for a blanking time interval to expire before switching the output voltage of the power circuitry to the second output voltage when the power management signal frequency is within the first frequency band that includes the first resonant frequency, wherein the blanking time interval begins at an initial time that determines that the power management signal frequency is within the first frequency band that includes the first resonant frequency.
21. The computer-readable medium of any of claims 18 to 20, further comprising instructions to:
determining whether the power management signal frequency is within a second frequency band that includes a second resonant frequency; and
changing the output voltage of power circuitry to a third output voltage different from the first output voltage and the second output voltage in response to the power management signal frequency being within the second frequency band including the second resonant frequency.
22. An apparatus for implementing the method of claim 12, comprising:
means for receiving a power management signal having a power management signal frequency;
means for determining whether the power management signal frequency is within a first frequency band that includes a first resonant frequency; and
means for providing a first indication to switch an output voltage of power circuitry from a first output voltage to a second output voltage different from the first output voltage in response to the power management signal frequency being within the first frequency band including the first resonant frequency.
23. The apparatus of claim 22, further comprising: means for providing a second indication after switching the output voltage of power logic to the second output voltage in response to the power management signal frequency becoming a second power management signal frequency outside of the first frequency band that is included with the first resonant frequency, the second indication to cause the output voltage of the power circuitry to switch to the first output voltage.
24. The device of claim 22, wherein the output voltage of the power circuitry switches from the first output voltage to the second output voltage after expiration of a blanking interval when the power management signal frequency is within the first frequency band that includes the first resonant frequency.
25. The apparatus of claim 22, wherein the second output voltage is higher than the first output voltage.
26. The apparatus of claim 22, further comprising:
means for determining whether the power management signal frequency is within a second frequency band that includes a second resonant frequency; and
means for providing a second indication in response to the power management signal frequency being within the second frequency band including the second resonant frequency, the second indication to cause the output voltage of power circuitry to become a third output voltage different from the first output voltage and the second output voltage.
27. An apparatus for delivering electrical power, comprising:
frequency generation logic to generate a signal having a signal frequency selectable within a frequency band;
a first pin for outputting the signal to a power supply;
a second pin to receive first power at a first voltage from the power supply; and
current measurement logic to measure a current provided to the first pin by the frequency generation logic;
wherein the frequency generation logic is to change the signal frequency within the frequency band and, in response to a first current increase detected by the current measurement logic when the signal frequency is near a first frequency of the frequency band, the frequency generation logic is to lock the signal frequency at a first locking frequency near the first frequency and, after locking the signal frequency at the first locking frequency, the second pin is to receive second power at a second voltage from the power supply.
28. The apparatus of claim 27, further comprising a Universal Serial Bus (USB) port including the first pin and the second pin, the USB port for coupling to a USB connector of the power source.
29. A computer readable medium storing processor-executable instructions that, when executed by a processor, cause the processor to:
receiving, at a detector logic, a power management signal having a power management signal frequency;
determining whether the power management signal frequency is within a first frequency band that includes a first resonant frequency; and
in response to the power management signal frequency being within the first frequency band including the first resonant frequency, providing a first indication for switching an output voltage of power circuitry from a first output voltage to a second output voltage different from the first output voltage.
30. The computer-readable medium of claim 29, further comprising instructions for: after switching the output voltage of power logic to the second output voltage, providing a second indication for causing the output voltage of the power circuitry to switch to the first output voltage in response to the power management signal frequency becoming a second power management signal frequency outside the first frequency band including the first resonant frequency.
31. The computer readable medium of claim 29, wherein the output voltage of the power circuitry switches from the first output voltage to the second output voltage after a blanking interval expires when the power management signal frequency is within the first frequency band that includes the first resonant frequency.
32. The computer readable medium of claim 29, wherein the second output voltage is higher than the first output voltage.
33. The computer-readable medium of claim 29, further comprising instructions for:
determining whether the power management signal frequency is within a second frequency band that includes a second resonant frequency; and
in response to the power management signal frequency being within the second frequency band including the second resonant frequency, providing a second indication for the output voltage of power circuitry to become a third output voltage different from the first output voltage and the second output voltage.
CN201580064238.3A 2014-12-23 2015-11-23 Apparatus and method for providing selectable charging voltage Active CN107005074B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IN6509/CHE/2014 2014-12-23
IN6509CH2014 2014-12-23
PCT/US2015/062123 WO2016105773A1 (en) 2014-12-23 2015-11-23 Apparatus and methods to provide a selectable charging voltage

Publications (2)

Publication Number Publication Date
CN107005074A CN107005074A (en) 2017-08-01
CN107005074B true CN107005074B (en) 2021-07-06

Family

ID=56151333

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201580064238.3A Active CN107005074B (en) 2014-12-23 2015-11-23 Apparatus and method for providing selectable charging voltage

Country Status (5)

Country Link
EP (1) EP3238321A4 (en)
JP (1) JP6612350B2 (en)
KR (1) KR102496919B1 (en)
CN (1) CN107005074B (en)
WO (1) WO2016105773A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6989308B2 (en) * 2017-07-06 2022-01-05 ローム株式会社 Wireless power transmission device and wireless charger using it
KR102577748B1 (en) * 2018-11-29 2023-09-14 에스케이하이닉스 주식회사 Power control curcuit and semiconductor apparatus using the power control circuit
US11218016B2 (en) * 2019-07-31 2022-01-04 Samsung Electronics Co., Ltd. Electronic device and frequency interference cancellation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1574541A (en) * 2003-06-11 2005-02-02 捷讯研究有限公司 Universal serial bus (USB) charger for a mobile device
CN1578045A (en) * 2003-07-03 2005-02-09 美国凹凸微系有限公司 Selector circuit for power management in multiple battery systems
EP1577998A1 (en) * 2004-03-18 2005-09-21 O2 Micro, Inc. Controllable AC/DC adapter for battery powered devices

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10164848A (en) * 1996-11-26 1998-06-19 Matsushita Electric Works Ltd Power converter
US6741066B1 (en) 2000-09-21 2004-05-25 O2Micro International Limited Power management for battery powered appliances
JP2003263245A (en) * 2002-03-07 2003-09-19 Fuji Xerox Co Ltd Usb device
US7834591B2 (en) * 2006-02-16 2010-11-16 Summit Microelectronics, Inc. Switching battery charging systems and methods
JP4602310B2 (en) * 2006-11-07 2010-12-22 伊藤超短波株式会社 Electronic therapy device
JP4893342B2 (en) * 2007-01-30 2012-03-07 株式会社Ｊｖｃケンウッド Portable radio and charger
US20130093381A1 (en) 2008-05-27 2013-04-18 Voltstar Technologies, Inc. Energy saving cable assembly
US8164932B2 (en) * 2009-02-12 2012-04-24 Apple Inc. Power converter with automatic mode switching
US8760123B2 (en) * 2012-10-29 2014-06-24 Qualcomm Incorporated High voltage dedicated charging port
US8745301B2 (en) * 2012-10-29 2014-06-03 Qualcomm Incorporated High voltage dedicated charging port
US9244876B2 (en) * 2012-12-20 2016-01-26 Blackberry Limited Method and apparatus pertaining to universal serial bus-based charging
KR200475093Y1 (en) * 2014-04-24 2014-11-11 여종률 Battery charging cradle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1574541A (en) * 2003-06-11 2005-02-02 捷讯研究有限公司 Universal serial bus (USB) charger for a mobile device
CN1578045A (en) * 2003-07-03 2005-02-09 美国凹凸微系有限公司 Selector circuit for power management in multiple battery systems
EP1577998A1 (en) * 2004-03-18 2005-09-21 O2 Micro, Inc. Controllable AC/DC adapter for battery powered devices

Also Published As

Publication number Publication date
JP6612350B2 (en) 2019-11-27
WO2016105773A1 (en) 2016-06-30
EP3238321A4 (en) 2018-08-08
KR20170097624A (en) 2017-08-28
KR102496919B1 (en) 2023-02-08
JP2018509121A (en) 2018-03-29
EP3238321A1 (en) 2017-11-01
CN107005074A (en) 2017-08-01

Similar Documents

Publication Publication Date Title
US10719402B2 (en) Power-loss protection
US10622802B2 (en) Power receiving apparatus and control circuit thereof
US9740258B2 (en) Hold-up energy storage and management
US9153984B2 (en) Charging device
US10983152B2 (en) USB data pin impedance detection
US8200852B2 (en) Multi-mode dongle for peripheral devices and associated methods
US10658860B2 (en) Electronic device, charger within the electronic device, and detecting method for detecting abnormal status of connector of electronic device
KR20140144277A (en) Electronic device and control method therefor
CN107005074B (en) Apparatus and method for providing selectable charging voltage
CN111742459A (en) Method for controlling voltage output to external electronic device according to voltage magnitude detected at signal terminal connected to external electronic device, and electronic device
CN112463686A (en) Board card hot-plug device and method
JP2016140211A (en) Power feeding system
US8929045B2 (en) Delay protection circuit and electronic device employing the same
US10476257B2 (en) Interface control circuit and control method thereof
CN106896311B (en) Measuring tool
CN105634038B (en) Electric signal output and power determination method and device
JP6352674B2 (en) Expansion device, device detection circuit and communication system
US11829169B2 (en) USB power delivery management
CN108092363B (en) Charging method and device
CN116683558A (en) Charging abnormity detection method and related device
US20150039150A1 (en) Hub and power management method thereof
US20120159033A1 (en) Motherboard
JP2022165536A (en) memory system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant