#Renesas Electronics America Inc.

Foreign object detection based on transmitter input parameter

Systems, apparatuses, and methods for detecting a foreign object on a wireless power charging region are described. A circuit can detect an object inductively coupled to a wireless power transmitter. …

DRIVE·Jun 9·1 min read

H02J50/60 Renesas Electronics America Inc.

ADAPTIVE VOLTAGE REGULATION WITH MULTIPLE PORTS

Systems and methods for adaptive voltage regulation with multiple ports are described. The device can include a first voltage regulator coupled to a first port and can regulate voltages between the fi…

DRIVE·Jun 4·1 min read

H02J7/865 Renesas Electronics America Inc.

WIRELESS POWER TRANSMITTER IMPLEMENTING LOW POWER PRE-CHARGING FOR FOREIGN OBJECT DETECTION IN A SEMICONDUCTOR DEVICE

In an embodiment, a semiconductor device is disclosed that includes a buffer circuit that is configured to selectively output a charge signal to an inductor-capacitor node of a power driver to charge …

DRIVE·May 28·1 min read

H02J50/12 Renesas Electronics America Inc.

Planar Litz coil for wireless power transfer

Structures, devices, and methods for wireless power transfer systems are described. A structure can include a plurality of strands arranged into a first coil layer and a second coil layer. The plurali…

DRIVE·May 26·1 min read

H01F27/2804 Renesas Electronics America Inc.

SEAMLESS SWAPPING OF CHARGER FORWARD AND REVERSE MODES

Systems and methods for operating a battery charger are described. A controller can operate a battery charger under a forward mode. Under the forward mode, a power supply is connected to the battery c…

DRIVE·Apr 30·1 min read

H02J7/865 Renesas Electronics America Inc.

INTERNAL AND EXTERNAL DEVICES CONTROL IN WIRELESS POWER SYSTEMS

Systems and methods for wireless power transmission are described. A wireless power transmitter can include a coil, an analog front end (AFE) and a controller. The AFE can include a set of internal me…

DRIVE·Jan 15·1 min read

H02J50/12 Renesas Electronics America Inc.

CHARGING SYSTEM

A charging system for sequentially charging an energy storage element over a plurality of operational phases is provided. The charging system includes a charging circuit and a control circuit. The cha…

DRIVE·Jan 1·1 min read

H02J7/00712 Renesas Electronics America Inc.

BI-DIRECTIONAL POWER FLOW CONTROL USING A SINGLE BATTERY CHARGER

Systems and methods for bi-directional power flow control using a single battery charger are described. According to one example, a semiconductor device is generally described. The semiconductor devic…

DRIVE·May 23·1 min read

H02J7/34 Renesas Electronics America Inc.

REAL-TIME MISFIRE DETECTION

Systems and methods for wireless power transfer systems are described. A controller can be coupled to a power rectifier configured to rectify alternating current power into direct current power. The p…

DRIVE·Feb 29·1 min read

H02M7/219 Renesas Electronics America Inc.

VOLTAGE DOUBLER IN WIRELESS POWER APPLICATION

DRIVE·Feb 29·1 min read

H02M7/25 Renesas Electronics America Inc.

METHOD AND SYSTEM USING A BATTERY VOLTAGE LOOP UNDER HIGH-CURRENT CONDITIONS

Systems and methods for using a battery voltage loop under high-current conditions are described. A method for operating a charger, the method includes setting, by a charger controller, a battery volt…

DRIVE·Jan 11·1 min read

H02J7/007182 Renesas Electronics America Inc.

Digital Demodulation for Wireless Power

In an embodiment, a semiconductor device is disclosed that includes at least one processing device and firmware including a dynamic demodulation engine. The dynamic demodulation engine, when executed …

DRIVE·Dec 7·1 min read

H04L27/06 Renesas Electronics America Inc.

APPARATUS AND METHOD FOR MEASURING BATTERY CELL VOLTAGE

In an embodiment, an apparatus is disclosed that includes a first battery management circuit. The first battery management circuit is configured to measure a voltage of a first battery cell of a batte…

DRIVE·Nov 16·2 min read

G01R31/396 Renesas Electronics America Inc.

CALIBRATION AND SYNCHRONIZATION OF GROUND CURRENT SENSING AMPLIFIER WITH WIRELESS POWER TRANSMITTER CONTROLLER

Systems and methods for calibrating a wireless power transmitter is described. A wireless power transmitter can include a controller and an amplifier module. The amplifier module can include an amplif…

DRIVE·Sep 14·1 min read

H03F3/04 Renesas Electronics America Inc.

WIRELESS POWER TRANSMITTER IMPLEMENTING MULTIPLEXING FOR MONITORING CIRCUITRY IN A SEMICONDUCTOR DEVICE

In an embodiment, a semiconductor device is disclosed that comprises a multiplexer. The multiplexer is configured to receive signals from each of a plurality of transmission coils of a wireless power …

DRIVE·Aug 31·1 min read

H04B5/0037 Renesas Electronics America Inc.

PHASE DEMODULATION USING PULSE SIGNAL

Systems and methods for phase demodulation is described. A wireless power transmitter can include a controller, a transmission coil, and an integrated circuit connected to the controller and the trans…

DRIVE·Aug 24·1 min read

H04L25/4902 Renesas Electronics America Inc.

PWM CONTROL OF ANALOG FRONT END

In an embodiment, a wireless power transmitter is disclosed that includes a first field-effect transistor, a second field-effect transistor a coil and an analog front end. The wireless power transmitt…

DRIVE·Jul 6·1 min read

H02J50/10 Renesas Electronics America Inc.

FOREIGN OBJECT DETECTION BASED ON TRANSMITTER INPUT PARAMETER

DRIVE·May 11·1 min read

H02J50/60 Renesas Electronics America Inc.

DISCHARGE CURRENT LIMIT LOOP FOR SHORT CIRCUIT PROTECTION IN REVERSE OPERATION FOR BUCK-BOOST BATTERY CHARGERS

A method, apparatus and non-transitory computer-readable medium of regulating current within a battery charging circuit. The apparatus including a first current sense resistor configured to sense a fi…

DRIVE·Apr 20·1 min read

H02J7/00304 Renesas Electronics America Inc.

MULTI-PORT CHARGING DEVICE WITH MULTIPLE CHARGERS

Battery charger systems and apparatuses are described. In an example, an apparatus may include a first controller, a first port connected to the first controller, a first charger module connected to t…

DRIVE·Mar 30·1 min read

H02J7/0013 Renesas Electronics America Inc.

ALTERNATING COMMUNICATION FOR WIRELESS POWER TRANSFER

Systems and apparatuses for wireless power transfer system are described. A receiver may send an amplitude shift key (ASK) signal to a transmitter. The transmitter may receive the ASK signal from the …

DRIVE·Mar 16·1 min read

H04B5/0037 Renesas Electronics America Inc.

MULTI-ELEMENT DRIVER TOPOLOGY FOR ELEMENT SELECTION

Apparatuses including multiple selectable circuit elements are described. In an example, an apparatus may include a power supply configured to output a voltage. The apparatus may further include a con…

DRIVE·Jan 26·1 min read

H02J50/12 Renesas Electronics America Inc.

Wireless Power Charging

A current sensing circuit and a minimum operating frequency for a wireless power transmission system is presented. A method of measuring current through a wireless power transmit coil, includes receiv…

DRIVE·Sep 22·1 min read

H02J50/80 Renesas Electronics America Inc.

BI-DIRECTIONAL ACTIVE BATTERY CELL BALANCER AND METHOD FOR BI-DIRECTIONAL CELL BALANCING

Systems and methods for balancing a pair of battery cells are described. A controller can determine a voltage difference based on a first voltage of a first battery cell and a second voltage of a seco…

DRIVE·Jul 14·1 min read

H02J7/0014 Renesas Electronics America Inc.

ACTIVE RECEIVER OVERVOLTAGE AND OVERPOWER PROTECTION IN WIRELESS POWER TRANSFER

An apparatus, a method and a non-transitory computer-readable storage medium storing a program for controlling power receiving operation. The apparatus includes a controller configured to compare a fr…

DRIVE·Jul 14·1 min read

H02J7/00308 Renesas Electronics America Inc.

DEVICE AND METHOD FOR REDUCING CURRENT OVERSHOOT IN A POWER REGULATOR

Example implementations include a method of reducing current overshoot in a power regulator device, by detecting a change in an input current of an inductive charger device in response to a change in …

DRIVE·Jun 23·2 min read

H02J7/06 Renesas Electronics America Inc.

INDUCTIVE CHARGER APPARATUS WITH MULTIPLE CHARGING PATHS AND METHOD FOR CHARGING THEREWITH

Exemplary embodiments may include a device with an input power component, a system supply component, an inductive charger component operatively coupled to the input component and the system component,…

DRIVE·Feb 17·1 min read

H02J7/007 Renesas Electronics America Inc.

Wireless Power Charging

DRIVE·Feb 3·1 min read

H02J50/80 Renesas Electronics America Inc.

FOREIGN OBJECT DETECTION USING WIRELESS POWER RECEIVER'S RESPONSE TO MODIFIED TRANSMITTER BEHAVIOR

A wireless power transmitter pulses the transmit power level unresponsively to the wireless power receiver's power requests in order to perform foreign object detection (FOD). The FOD is performed by …

DRIVE·Dec 30·1 min read

H02J50/60 Renesas Electronics America Inc.

ASK MODULATION

In accordance with some embodiments of the present invention, a wireless power receiver that ramps an ASK impedance is presented. A method of amplitude shift key (ASK) modulation in a wireless power r…

DRIVE·Dec 9·1 min read

H04L27/04 Renesas Electronics America Inc.

Wireless Power Charging with Authentication

An authentication method for authenticating a wireless power transmitter to a wireless power receiver includes receiving a SSP value, an ID, and a random number RND from a wireless power receiver; det…

DRIVE·Dec 9·1 min read

H02J7/00045 Renesas Electronics America Inc.

COORDINATING VOLTAGE AND FREQUENCY CHANGES IN WIRELESS POWER TRANSFER

A wireless transmitter coordinates changes in the transmitter's input or output voltages with changes in the transmitter's operating frequency to counteract the transmitter's output power changes whil…

DRIVE·Dec 9·1 min read

H02H9/04 Renesas Electronics America Inc.

Universal Wireless Charging Surface

According to some embodiments, a wireless power transmitter is presented. In some embodiments, a wireless power transmitter includes a charging table; a plurality of movable transmitter coils incorpor…

DRIVE·Dec 2·1 min read

H02J50/90 Renesas Electronics America Inc.

MULTI-COIL PTX/PRX OPERATION AND CONTROL

According to some embodiments, a wireless power transmitter is disclosed. The wireless power transmitter can include a plurality of transmission coils arranged to cover a charging area and coupled wit…

DRIVE·Nov 11·1 min read

H02J50/10 Renesas Electronics America Inc.

Multi-Coil Wireless Power Transmitter

A system and method of transmitting power according to some embodiments includes sequentially pinging each of a plurality of transmit coils to locate a receiver; determining one or more active coils f…

DRIVE·Sep 9·1 min read

H02J50/402 Renesas Electronics America Inc.

DEVICE AND METHOD FOR GENERATING MAGNITUDE AND RATE OFFSETS AT A PHASE COMPARATOR

Example implementations include a method of obtaining an input voltage of a power converter circuit and a system voltage of the power converter circuit, obtaining a voltage rate gain based on an aggre…

DRIVE·Jun 10·2 min read

H02J7/00712 Renesas Electronics America Inc.

Wireless Power System

A method of over-current protection in a wireless power receiver operating in a high-power mode includes digitally receiving an output current signal, generating an OC INT signal if the output current…

DRIVE·May 13·1 min read

H02J50/80 Renesas Electronics America Inc.

DEVICE AND METHOD FOR CHARGING A BATTERY DISCHARGED BEYOND AT LEAST ONE OPERATING THRESHOLD

Example implementations include obtaining charging power from a power source, obtaining a charging command, activating a trickle current to a battery, entering a first charging state in response to a …

DRIVE·Apr 22·2 min read

H02J7/007182 Renesas Electronics America Inc.