Stmicroelectronics S.r.l.

St-ericsson Sa

Stmicroelectronics S.a.

Stmicroelectronics Application Gmbh

Stmicroelectronics Design and Application S.r.o.

Vincenzo Polisi

Patrizia Milazzo

Fred Rennig

Mirko Dondini

Giuseppe Platania

Alexandre Balmefrezol

CalogeroAndrea Trecarichi

Ludek Beran

Calogero Andrea Trecarichi

Donato Tagliavia

Francesco Nino Mammoliti

Vaclav Dvorak

Jerome Nebon

Jochen Barthel

Alfonso Furio

Marianna Sanza'

In an embodiment, an electronic circuit includes: a supply management circuit for receiving an input supply voltage and providing a first supply voltage; and a main circuit configured to: when the input supply voltage becomes higher than a first threshold, cause the electronic circuit to transition into an initialization state in which an oscillator is enabled and configuration data is copied from an NVM to configuration registers, and then to transition into a standby state in which the oscillator is disabled and content of the configuration registers is preserved by the first supply voltage, and, upon reception of a wakeup event, cause the configuration data from the configuration registers to be applied to the first circuit, and cause the electronic circuit to transition into an active state in which the first oscillator is enabled and the first circuit is configured to operate based on the configuration data.

Power management circuit and method

A control circuit for a voltage source generates a reference signal for a voltage source, wherein the reference signal indicates a requested output voltage to be generated by the voltage source. A digital feed-forward control circuit computes a digital feed-forward regulation value indicative of a requested output voltage by determining a maximum voltage drop at strings of solid-state light sources. A digital feed-back control circuit determines a minimum voltage drop for current regulators/limiters for the strings and determines a digital feed-back correction value as a function of the minimum voltage drop. The control circuit then sets the reference signal after a start-up as a function of the digital feed-forward regulation value and corrects the reference signal as a function of the digital feed-back correction value.

Current supply system, related integrated circuit, power supply system and method of operating a current supply system

A DC-DC converter controls a supply current (I) provided to a rechargeable battery. The converter comprises an electrical input terminal that receives supply current (I). An electrical output terminal is connected to the battery through a coil with a resistor in series therebetween. A controllable selector connects the input terminal to the output terminal during a first time interval in order to supply the battery and to connect the input terminal to a ground potential during a successive second time interval. Also, a feedback module generates a control signal for the selector from a resistor feedback signal, indicative of a variation of a battery charge current (I). The feedback module has an electronic block that receives the feedback signal. The electronic block processes the feedback signal to measure a variation of the supply current (I) and provide the control signal to adjust the duration of the first time interval.

DC-DC converter for the control of a battery charge current in portable electronic devices

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).

Power management circuit for a portable electronic device including USB functionality and method for doing the same

A power management unit for a battery-operated electronic device having a bus interface for the interconnection with another electronic device, the power management unit including an electric energy storage element coupled between a battery of the battery-operated electronic device and a voltage supply line of the bus interface, the electric energy storage element being operable to charge/discharge electric energy; a drive circuitry arranged to control a charge/discharge of the electric energy storage element. The drive circuitry is operable to cause an electric power supplied by the other electronic device through the voltage supply line to re-charge the battery; or, in case the other electronic device does not supply electric power, cause the battery supply electric power to the other electronic device through the voltage supply line. The power management unit is particularly adapted for battery-operated, mobile USB OTG devices.

Power management unit for battery-operated devices

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Catania, Italy

Vincenzo Polisi