A PD device comprises: a DC/DC converter disposed between an input and a VBUS output; a primary-side controller configured to control an input current of the DC/DC converter; a secondary-side controller coupled to a plurality of control inputs, the secondary-side controller configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feedback the control input signals subjected to the signal conversion to the primary-side controller, wherein the primary-side controller varies an output voltage value and an available output current value (MAX value) of the DC/DC converter by controlling the input current of the DC/DC converter on the basis of the control input signal fed back from the secondary-side controller. The PD device is capable of switching with respect to the plurality of apparatuses and controlling the output voltage value and the available output current value (MAX value).

A PD device comprises: a DC/DC converter disposed between an input and a VBUS output; a primary-side controller configured to control an input current of the DC/DC converter; a secondary-side controller coupled to a plurality of control inputs, the secondary-side controller configured to executed a signal conversion of control input signals of the plurality of the control inputs, and configured to feedback the control input signals subjected to the signal conversion to the primary-side controller, wherein the primary-side controller varies an output voltage value and an available output current value (MAX value) of the DC/DC converter by controlling the input current of the DC/DC converter on the basis of the control input signal fed back from the secondary-side controller. The PD device is capable of switching with respect to the plurality of apparatuses and controlling the output voltage value and the available output current value (MAX value).

Portable lighting devices, systems and methods are provided. The portable lighting devices may include a light source, a rechargeable battery, a battery charging and control circuitry, a power connector port and a wireless communication circuitry. The battery charging and control circuitry may be configured to control transmission of current from the rechargeable battery to the light source, and transmission of current from the rechargeable battery through the power connector port and onto an external device. The transmission of current to the external device may occur when the rechargeable battery has a charge capacity above a predetermined threshold level and terminates when the charge capacity of the rechargeable battery is at or below the predetermined threshold level. The wireless communication circuitry may be configured to transmit a battery condition information of the rechargeable battery to an external communication device through a wireless link.

In accordance with an aspect of the disclosure, an electronic device comprises: a battery; a receive coil configured to wirelessly receive power from a transmit coil of an external power device; and a power management module electrically connected with the battery and the receive coil, wherein the power management module includes: a rectifier circuit configured to rectify current flowing in the receive coil, the rectifier circuit including an output terminal; a charging circuit configured to charge the battery including a plurality of switches and an input terminal, the input terminal connected to the output terminal of the rectifier circuit; and a rectifying capacitor electrically connected with the output terminal of the rectifier circuit and the input terminal of the charging circuit, and wherein the power management module generates a sync signal based on current flowing in the output terminal of the rectifier circuit and controls whether the plurality of switches operate or switching frequencies of the plurality of switches, based on the sync signal.

In accordance with an aspect of the disclosure, an electronic device comprises: a battery; a receive coil configured to wirelessly receive power from a transmit coil of an external power device; and a power management module electrically connected with the battery and the receive coil, wherein the power management module includes: a rectifier circuit configured to rectify current flowing in the receive coil, the rectifier circuit including an output terminal; a charging circuit configured to charge the battery including a plurality of switches and an input terminal, the input terminal connected to the output terminal of the rectifier circuit; and a rectifying capacitor electrically connected with the output terminal of the rectifier circuit and the input terminal of the charging circuit, and wherein the power management module generates a sync signal based on current flowing in the output terminal of the rectifier circuit and controls whether the plurality of switches operate or switching frequencies of the plurality of switches, based on the sync signal.

The present invention discloses a modular intelligent combined wind power converter and a control method thereof. The modular intelligent combined wind power converter comprises separate bridge arm power units, wherein a plurality of the bridge arm power units are connected in parallel to form a high-capacity bridge arm power module, three bridge arm power modules form a three-phase full-controlled bridge power module, and the three-phase full-controlled bridge power module comprises an electric reactor, a capacitor, a fuse and a circuit breaker to form a basic converter module, and the basic converter module forms a high-capacity wind power converter through a modular intelligent combination method.

The present invention discloses a modular intelligent combined wind power converter and a control method thereof. The modular intelligent combined wind power converter comprises separate bridge arm power units, wherein a plurality of the bridge arm power units are connected in parallel to form a high-capacity bridge arm power module, three bridge arm power modules form a three-phase full-controlled bridge power module, and the three-phase full-controlled bridge power module comprises an electric reactor, a capacitor, a fuse and a circuit breaker to form a basic converter module, and the basic converter module forms a high-capacity wind power converter through a modular intelligent combination method.

A lead-acid battery monitoring device includes a plurality of sensor units 20 attached to a plurality of lead-acid batteries 1 connected in series and/or in parallel and a control unit 10 that sequentially establishes wireless communication connection with the plurality of monitoring units 20. The lead -acid battery monitoring device executes a first monitoring operation in which the management unit 10 sequentially receives monitoring data including an internal resistance and a temperature of each lead-acid battery 1 from the plurality of monitoring units 20 and a second monitoring operation in which the management unit 10 sequentially receives monitoring data including the temperature of each lead-acid battery 1 from the plurality of monitoring units 20.

A power supply system includes a storage battery and first and second current sensors for detecting electric current flowing to the storage battery. The second current sensor has a wider current detection range than the first current sensor. A storage battery control apparatus includes: an abnormality determination unit that determines whether an abnormality has occurred in the first current sensor; a first charging control unit that performs, when no abnormality has occurred in the first current sensor, a charging completion determination based on the electric current detected by the first current sensor; and a second charging control unit that performs, when an abnormality has occurred in the first current sensor, the charging completion determination based on the electric current detected by the second current sensor. The first charging control unit and the second charging control unit have different determination criteria for determining completion of the charging of the storage battery.

A low dropout voltage regulator unit includes an error amplifier and a power stage having an output terminal that is looped back onto the error amplifier and is capable of delivering an output current to a load. The unit includes multiple main supply inputs that are intended to potentially receive, respectively, multiple different supply voltages. The power stage includes multiple power paths that are connected, respectively, between the main supply inputs and the output terminal, are individually selectable and each comprise an output transistor. The unit also includes a selector circuit connected to the main supply inputs and configured to select one of the power paths according to a selection criterion. The error amplifier includes an output stage configured to selectively control the output transistor of the selected power path.