Stmicroelectronics (Grand Ouest) Sas

St-Ericsson Sa

Christophe Belet

Load current consumption measured using a first resistor having a high resistive value and a second resistor having a low resistive value. Differential amplifiers, the outputs of which are coupled to analog-to-digital converters and to a processing circuit unit, are connected to each of the nodes of the resistors. Depending on the current level, the processing circuit unit advantageously selects one of the analog-to-digital converters to estimate the present consumption of current in the load. Each input terminal of a resistor is advantageously power supplied from a power amplifier and each power amplifier is advantageously driven by a control loop. For low load currents, the first amplifier associated with the first resistor power supplies the load through the resistors while, for high load currents, when this first amplifier saturates, the second amplifier associated with the second resistor, takes over from the first amplifier to continue to power supply the load.

Device for power supplying a load and measuring the current consumption of the load

A USB Type-C device supporting a bidirectional power supply, includes: a first device terminal configured to be coupled to a second USB Type-C device; a second device terminal configured to be coupled to a rechargeable DC voltage power source; and a reversible switched-mode power supply coupled to the first device terminal and the second device terminal.

Method for converting electric energy between C-type USB devices and corresponding device

A module incorporated within a system-on-a-chip operating in a steady-state power supply phase is powered by supplying to the module a regulated power supply voltage obtained from a feedback control loop. The receives a main power supply voltage and a negative feedback voltage. The negative feedback voltage is generated inside the system-on-a-chip starting from an effective supply voltage of the module and from a setpoint signal corresponding to a desired regulated power supply voltage.

Method for powering a module incorporated within a system-on-a-chip and corresponding electronic device

A process for performing an auto-test of a fully discharged battery () of an electronic appliance including a battery charger (), said process involving the steps of: performing () an initialization phase; charging () said battery () with a predetermined constant current during a predefined period allowing stabilization of said current (Icurrent); detecting () the voltage of said battery after said predefined period, said battery being still in charge; testing () whether said sensed voltage is comprised within a predetermined range of threshold values (V1, V2), and reporting a battery failure when said sensed value is outside said range. The invention is particularly adapted to the auto-test of a backup battery made of Electric double layer capacitors or any fully discharged backup battery.

Growing community of inventors

Parigne l'eveque, France

Christophe Belet