# US 2013/0154550 A1 · Power Management Circuit for a Portable Electronic Device Including USB Functionality and Method for Doing the Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154550 A1 - Document ID: US20130154550A1 - Status: Published application - Kind: A1 - Application number: 13/819,168 - Filed: 2011-08-25 - Published: 2013-06-20 - Earliest claimed: 2010-08-26 - Assignees: ST-Ericsson SA - Inventors: Alexandre Balmefrezol; Patrizia Milazzo; Giuseppe Platania; Vicenzo Polisi - Web page: https://patentgrep.com/patent/US20130154550A1 ## CPC - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - G06F 1/263: {Arrangements for using multiple switchable power supplies, e.g. battery and AC (G06F1/30 takes precedence)} - H02J 1/102: being switching converters (H02J1/108, H02J1/12 take precedence) - H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)} - H02J 2207/20: Charging or discharging characterised by the power electronics converter - H02J 2207/40: adapted for charging from various sources, e.g. AC, DC or multivoltage - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A Power Management Circuit for a portable electronic device comprising an internal battery to be charged either through a first interface or through an AC_DC conversion circuit. The circuit comprises a first buck/boost converter having a Switched Mode Power Supply (SMPS) mode which can be controlled either in a buck or a boost mode, said first buck/boost controller being associated with a first external coil for the purpose of embodying a battery charging circuit through a first interface (USB). The circuit further comprises a second buck/boost converter which can also be controlled either in a buck or a boost mode. Bypass circuits are used for performing, under control of a control circuit, the bypass of either the voltage of the battery or the voltage generated by said buck/boost controllers when in boost mode to a second interface (SIM/MMC). ## Claims ### Claim at position 1 1-13. (canceled) ### Claim 14 A power management circuit for a portable electronic device comprising an internal battery chargable either through a first interface or through an AC-DC conversion circuit, said circuit comprising: a first buck/boost converter having a Switched Mode Power Supply (SMPS) mode which is configured to be controlled either in a buck or a boost mode, said first buck/boost controller being associated with a first external coil for embodying a battery charging circuit where a battery is chargable through a first interface (USB), a second buck/boost converter having a Switched Mode Power Supply (SMPS) mode configured to be controlled either in a buck or a boost mode, said second buck/boost controller being associated with a second external coil for embodying a second battery charging circuit where said battery is chargable through an AC/DC interface; by-pass circuit for performing a by-pass of either the voltage of said battery or of the voltage generated by said buck/boost controllers when in boost mode to a second interface (SIM/MMC), controlled by a control signal; and control circuit for controlling the Switched Mode Power Supply (SMPS) mode of said first and second buck/boost controller and for controlling said by-pass means so as to generate a converted voltage to said second interface. ### Claim 15 (depends on 14) The power management circuit according to claim 14 characterized in that said first interface is a Universal Bus Interface. ### Claim 16 (depends on 14) The power management circuit according to claim 14 characterized in that said second interface is a SIM interface. ### Claim 17 (depends on 14) The power management circuit according to claim 14 characterized in that said second interface is a MMC interface. ### Claim 18 (depends on 15) The power management circuit according to claim 15 characterized in that said battery is a li-Ion battery. ### Claim 19 A portable terminal equipment comprising a power management circuit including an internal battery which can be charged either through a USB interface or an AC/DC interface, said power management circuit comprising: a first buck/boost converter having a Switched Mode Power Supply (SMPS) mode configured to be controlled either in a buck or a boost mode, said first buck/boost controller being associated with a first external coil for embodying a battery charging circuit where a battery is chargeable through a first interface (USB), a second buck/boost converter having a Switched Mode Power Supply (SMPS) mode configured to be controlled either in a buck or a boost mode, said second buck/boost controller being associated with a second external coil for embodying a second battery charging circuit where said battery is chargeable through an AC/DC interface; by-pass circuit for performing a by-pass of either the voltage of said battery or the voltage generated by said buck/boost controllers when in boost mode to a second interface (SIM/MMC), controlled by a control signal; and controlling circuit for controlling the Switched Mode Power Supply (SMPS) mode of said first and second buck/boost controller and also for controlling said by-pass means so as to generate a converted voltage to said second interface. ### Claim 20 (depends on 14) A telecommunication network device characterized in that it includes a power management circuit as in claim 14. ### Claim 21 (depends on 20) A telecommunication network device according to claim 20 characterized in that it is a Portable Assistant Document. ### Claim 22 A method for generating the power management of a portable electronic device comprising an internal battery chargeable either through a USB interface or through an AC/DC interface, said method comprising the steps of: arranging a first buck/boost converter associated with a first external coil for embodying a battery charging circuit where a battery is chargeable through an USB interface, said buck/boost converter also achieves a DC/DC up voltage conversion for converting the voltage from the battery to said USB interface so as to supply current to a peripheral unit connected to said USB interface; arranging a second buck converter associated with a second external coil for embodying a second battery charging circuit where said battery is chargeable through an AC/DC interface; arranging said second buck converter so as to perform boost conversion of the voltage of the battery to generate a higher voltage; by-passing the voltage of the battery, or the voltage generated by one of the two buck/boost converters controlled by a control signal; sensing the voltage of the battery as well as the voltage appearing from said USB interface and said AC/DC interface; and generating said control signal in response to said sensing step to bypass the higher voltage to said second interface. ### Claim 23 (depends on 22) The method according to claim 22 characterized in that said battery is a li-Ion battery. ### Claim 24 (depends on 22) The method according to claim 22 characterized in that said second interface is a 3V SIM interface. ### Claim 25 (depends on 22) The method according to claim 22 characterized in that said second interface is a 3V MMC interface. ### Claim 26 (depends on 22) A mobile telephone including circuits for performing the method of claim 22, further including a transceiver for transmitting and receiving wireless signals and a processing circuit for processing the wireless signals.